/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/array-int-symm.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 04:23:40,437 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 04:23:40,440 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 04:23:40,474 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 04:23:40,524 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 04:23:40,524 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 04:23:40,525 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 04:23:40,529 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 04:23:40,565 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 04:23:40,565 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 04:23:40,565 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 04:23:40,566 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 04:23:40,568 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 04:23:40,568 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 04:23:40,568 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 04:23:40,569 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 04:23:40,569 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 04:23:40,569 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 04:23:40,570 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 04:23:40,570 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 04:23:40,570 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 04:23:40,570 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 04:23:40,570 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 04:23:40,570 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 04:23:40,571 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 04:23:40,571 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 04:23:40,571 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 04:23:40,571 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 04:23:40,571 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 04:23:40,571 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 04:23:40,572 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 04:23:40,572 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 04:23:40,572 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 04:23:40,572 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 04:23:40,572 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 04:23:40,572 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 04:23:40,572 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 04:23:40,573 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 04:23:40,573 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 04:23:40,573 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 04:23:40,878 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 04:23:40,895 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 04:23:40,897 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 04:23:40,898 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 04:23:40,899 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 04:23:40,900 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/array-int-symm.wvr.bpl [2021-06-05 04:23:40,900 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/array-int-symm.wvr.bpl' [2021-06-05 04:23:40,932 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 04:23:40,934 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 04:23:40,935 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 04:23:40,935 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 04:23:40,935 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 04:23:40,947 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:23:40" (1/1) ... [2021-06-05 04:23:40,955 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:23:40" (1/1) ... [2021-06-05 04:23:40,961 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 04:23:40,963 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 04:23:40,963 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 04:23:40,964 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 04:23:40,970 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:23:40" (1/1) ... [2021-06-05 04:23:40,970 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:23:40" (1/1) ... [2021-06-05 04:23:40,980 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:23:40" (1/1) ... [2021-06-05 04:23:40,980 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:23:40" (1/1) ... [2021-06-05 04:23:40,987 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:23:40" (1/1) ... [2021-06-05 04:23:40,989 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:23:40" (1/1) ... [2021-06-05 04:23:40,990 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:23:40" (1/1) ... [2021-06-05 04:23:40,991 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 04:23:40,991 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 04:23:40,991 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 04:23:40,992 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 04:23:40,994 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:23:40" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 04:23:41,068 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 04:23:41,069 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 04:23:41,069 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 04:23:41,069 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 04:23:41,069 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 04:23:41,070 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 04:23:41,070 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 04:23:41,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 04:23:41,070 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 04:23:41,071 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 04:23:41,391 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 04:23:41,391 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-06-05 04:23:41,392 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-06-05 04:23:41,392 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-06-05 04:23:41,393 INFO L202 PluginConnector]: Adding new model array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 04:23:41 BoogieIcfgContainer [2021-06-05 04:23:41,393 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 04:23:41,395 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 04:23:41,395 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 04:23:41,397 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 04:23:41,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:23:40" (1/2) ... [2021-06-05 04:23:41,398 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52a9c606 and model type array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 04:23:41, skipping insertion in model container [2021-06-05 04:23:41,398 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 04:23:41" (2/2) ... [2021-06-05 04:23:41,399 INFO L111 eAbstractionObserver]: Analyzing ICFG array-int-symm.wvr.bpl [2021-06-05 04:23:41,404 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 04:23:41,404 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 04:23:41,404 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 04:23:41,405 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 04:23:41,478 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 04:23:41,495 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 04:23:41,511 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 04:23:41,511 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 04:23:41,511 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 04:23:41,511 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 04:23:41,511 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 04:23:41,511 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 04:23:41,511 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 04:23:41,511 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 04:23:41,518 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 21 places, 16 transitions, 48 flow [2021-06-05 04:23:41,526 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:41,528 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:41,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 04:23:41,532 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:23:41,532 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:23:41,533 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:23:41,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:23:41,537 INFO L82 PathProgramCache]: Analyzing trace with hash -381977242, now seen corresponding path program 1 times [2021-06-05 04:23:41,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:23:41,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227794166] [2021-06-05 04:23:41,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:23:41,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:23:41,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:23:41,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:23:41,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227794166] [2021-06-05 04:23:41,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227794166] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:23:41,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:23:41,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 04:23:41,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556285169] [2021-06-05 04:23:41,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 04:23:41,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:23:41,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 04:23:41,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 04:23:41,777 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:41,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:23:41,843 INFO L93 Difference]: Finished difference Result 40 states and 72 transitions. [2021-06-05 04:23:41,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 04:23:41,845 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-05 04:23:41,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:23:41,853 INFO L225 Difference]: With dead ends: 40 [2021-06-05 04:23:41,853 INFO L226 Difference]: Without dead ends: 37 [2021-06-05 04:23:41,856 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 46.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:23:41,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-06-05 04:23:41,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2021-06-05 04:23:41,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:41,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 52 transitions. [2021-06-05 04:23:41,886 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 52 transitions. Word has length 10 [2021-06-05 04:23:41,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:23:41,887 INFO L482 AbstractCegarLoop]: Abstraction has 28 states and 52 transitions. [2021-06-05 04:23:41,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:41,887 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 52 transitions. [2021-06-05 04:23:41,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 04:23:41,889 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:23:41,889 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:23:41,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 04:23:41,890 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:23:41,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:23:41,894 INFO L82 PathProgramCache]: Analyzing trace with hash -481455702, now seen corresponding path program 2 times [2021-06-05 04:23:41,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:23:41,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732605522] [2021-06-05 04:23:41,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:23:41,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:23:41,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:23:41,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:23:41,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732605522] [2021-06-05 04:23:41,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732605522] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:23:41,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:23:41,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 04:23:41,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497603472] [2021-06-05 04:23:41,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 04:23:41,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:23:41,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 04:23:41,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 04:23:41,975 INFO L87 Difference]: Start difference. First operand 28 states and 52 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:42,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:23:42,017 INFO L93 Difference]: Finished difference Result 46 states and 84 transitions. [2021-06-05 04:23:42,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 04:23:42,017 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-05 04:23:42,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:23:42,018 INFO L225 Difference]: With dead ends: 46 [2021-06-05 04:23:42,018 INFO L226 Difference]: Without dead ends: 43 [2021-06-05 04:23:42,019 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:23:42,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-06-05 04:23:42,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2021-06-05 04:23:42,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:42,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 56 transitions. [2021-06-05 04:23:42,025 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 56 transitions. Word has length 10 [2021-06-05 04:23:42,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:23:42,025 INFO L482 AbstractCegarLoop]: Abstraction has 30 states and 56 transitions. [2021-06-05 04:23:42,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:42,026 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 56 transitions. [2021-06-05 04:23:42,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 04:23:42,026 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:23:42,026 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:23:42,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 04:23:42,027 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:23:42,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:23:42,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1042522380, now seen corresponding path program 1 times [2021-06-05 04:23:42,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:23:42,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514331327] [2021-06-05 04:23:42,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:23:42,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:23:42,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:23:42,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:23:42,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514331327] [2021-06-05 04:23:42,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514331327] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:23:42,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:23:42,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 04:23:42,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062743117] [2021-06-05 04:23:42,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 04:23:42,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:23:42,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 04:23:42,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:23:42,071 INFO L87 Difference]: Start difference. First operand 30 states and 56 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:42,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:23:42,119 INFO L93 Difference]: Finished difference Result 41 states and 72 transitions. [2021-06-05 04:23:42,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 04:23:42,120 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 04:23:42,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:23:42,121 INFO L225 Difference]: With dead ends: 41 [2021-06-05 04:23:42,121 INFO L226 Difference]: Without dead ends: 36 [2021-06-05 04:23:42,121 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:23:42,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-06-05 04:23:42,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 27. [2021-06-05 04:23:42,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:42,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 50 transitions. [2021-06-05 04:23:42,126 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 50 transitions. Word has length 11 [2021-06-05 04:23:42,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:23:42,126 INFO L482 AbstractCegarLoop]: Abstraction has 27 states and 50 transitions. [2021-06-05 04:23:42,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:42,126 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 50 transitions. [2021-06-05 04:23:42,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 04:23:42,127 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:23:42,127 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:23:42,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 04:23:42,127 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:23:42,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:23:42,128 INFO L82 PathProgramCache]: Analyzing trace with hash -707752582, now seen corresponding path program 1 times [2021-06-05 04:23:42,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:23:42,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084259836] [2021-06-05 04:23:42,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:23:42,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:23:42,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:23:42,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:23:42,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084259836] [2021-06-05 04:23:42,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084259836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:23:42,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914753168] [2021-06-05 04:23:42,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:23:42,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:23:42,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 04:23:42,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:23:42,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:23:42,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914753168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:23:42,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:23:42,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 04:23:42,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878699498] [2021-06-05 04:23:42,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 04:23:42,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:23:42,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 04:23:42,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 04:23:42,288 INFO L87 Difference]: Start difference. First operand 27 states and 50 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:42,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:23:42,335 INFO L93 Difference]: Finished difference Result 39 states and 71 transitions. [2021-06-05 04:23:42,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 04:23:42,336 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 04:23:42,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:23:42,336 INFO L225 Difference]: With dead ends: 39 [2021-06-05 04:23:42,336 INFO L226 Difference]: Without dead ends: 39 [2021-06-05 04:23:42,337 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 44.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:23:42,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-06-05 04:23:42,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2021-06-05 04:23:42,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:42,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 53 transitions. [2021-06-05 04:23:42,341 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 53 transitions. Word has length 11 [2021-06-05 04:23:42,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:23:42,341 INFO L482 AbstractCegarLoop]: Abstraction has 28 states and 53 transitions. [2021-06-05 04:23:42,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:42,341 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 53 transitions. [2021-06-05 04:23:42,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 04:23:42,342 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:23:42,342 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:23:42,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:23:42,553 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:23:42,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:23:42,554 INFO L82 PathProgramCache]: Analyzing trace with hash -742242342, now seen corresponding path program 2 times [2021-06-05 04:23:42,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:23:42,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097141456] [2021-06-05 04:23:42,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:23:42,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:23:42,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:23:42,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:23:42,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097141456] [2021-06-05 04:23:42,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097141456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:23:42,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669194317] [2021-06-05 04:23:42,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:23:42,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:23:42,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:23:42,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 04:23:42,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:23:42,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:23:42,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669194317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:23:42,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:23:42,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 04:23:42,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536617002] [2021-06-05 04:23:42,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:23:42,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:23:42,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:23:42,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:23:42,692 INFO L87 Difference]: Start difference. First operand 28 states and 53 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:42,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:23:42,735 INFO L93 Difference]: Finished difference Result 52 states and 92 transitions. [2021-06-05 04:23:42,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 04:23:42,735 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 04:23:42,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:23:42,736 INFO L225 Difference]: With dead ends: 52 [2021-06-05 04:23:42,736 INFO L226 Difference]: Without dead ends: 52 [2021-06-05 04:23:42,736 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 42.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:23:42,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-06-05 04:23:42,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 30. [2021-06-05 04:23:42,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:42,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 60 transitions. [2021-06-05 04:23:42,740 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 60 transitions. Word has length 11 [2021-06-05 04:23:42,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:23:42,741 INFO L482 AbstractCegarLoop]: Abstraction has 30 states and 60 transitions. [2021-06-05 04:23:42,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:42,742 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 60 transitions. [2021-06-05 04:23:42,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 04:23:42,742 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:23:42,742 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:23:42,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:23:42,965 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:23:42,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:23:42,965 INFO L82 PathProgramCache]: Analyzing trace with hash 59373886, now seen corresponding path program 2 times [2021-06-05 04:23:42,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:23:42,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547355418] [2021-06-05 04:23:42,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:23:42,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:23:42,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:23:42,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:23:42,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547355418] [2021-06-05 04:23:42,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547355418] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:23:42,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:23:42,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 04:23:42,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083469763] [2021-06-05 04:23:42,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 04:23:42,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:23:42,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 04:23:42,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:23:42,998 INFO L87 Difference]: Start difference. First operand 30 states and 60 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:43,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:23:43,038 INFO L93 Difference]: Finished difference Result 42 states and 77 transitions. [2021-06-05 04:23:43,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 04:23:43,039 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 04:23:43,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:23:43,039 INFO L225 Difference]: With dead ends: 42 [2021-06-05 04:23:43,039 INFO L226 Difference]: Without dead ends: 41 [2021-06-05 04:23:43,040 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:23:43,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-06-05 04:23:43,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2021-06-05 04:23:43,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:43,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 64 transitions. [2021-06-05 04:23:43,043 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 64 transitions. Word has length 11 [2021-06-05 04:23:43,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:23:43,043 INFO L482 AbstractCegarLoop]: Abstraction has 32 states and 64 transitions. [2021-06-05 04:23:43,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:43,044 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 64 transitions. [2021-06-05 04:23:43,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 04:23:43,044 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:23:43,044 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:23:43,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 04:23:43,045 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:23:43,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:23:43,045 INFO L82 PathProgramCache]: Analyzing trace with hash 865278844, now seen corresponding path program 3 times [2021-06-05 04:23:43,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:23:43,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422377700] [2021-06-05 04:23:43,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:23:43,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:23:43,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:23:43,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:23:43,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422377700] [2021-06-05 04:23:43,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422377700] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:23:43,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:23:43,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 04:23:43,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019065686] [2021-06-05 04:23:43,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 04:23:43,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:23:43,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 04:23:43,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:23:43,078 INFO L87 Difference]: Start difference. First operand 32 states and 64 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:43,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:23:43,133 INFO L93 Difference]: Finished difference Result 46 states and 84 transitions. [2021-06-05 04:23:43,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 04:23:43,149 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 04:23:43,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:23:43,150 INFO L225 Difference]: With dead ends: 46 [2021-06-05 04:23:43,150 INFO L226 Difference]: Without dead ends: 44 [2021-06-05 04:23:43,150 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:23:43,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-06-05 04:23:43,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 32. [2021-06-05 04:23:43,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 2.032258064516129) internal successors, (63), 31 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:43,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 63 transitions. [2021-06-05 04:23:43,154 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 63 transitions. Word has length 11 [2021-06-05 04:23:43,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:23:43,154 INFO L482 AbstractCegarLoop]: Abstraction has 32 states and 63 transitions. [2021-06-05 04:23:43,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:43,154 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 63 transitions. [2021-06-05 04:23:43,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 04:23:43,154 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:23:43,155 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:23:43,155 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 04:23:43,155 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:23:43,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:23:43,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1777717592, now seen corresponding path program 3 times [2021-06-05 04:23:43,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:23:43,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55144882] [2021-06-05 04:23:43,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:23:43,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:23:43,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:23:43,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:23:43,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55144882] [2021-06-05 04:23:43,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55144882] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:23:43,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:23:43,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 04:23:43,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942048786] [2021-06-05 04:23:43,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 04:23:43,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:23:43,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 04:23:43,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:23:43,200 INFO L87 Difference]: Start difference. First operand 32 states and 63 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:43,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:23:43,242 INFO L93 Difference]: Finished difference Result 38 states and 73 transitions. [2021-06-05 04:23:43,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 04:23:43,243 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 04:23:43,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:23:43,244 INFO L225 Difference]: With dead ends: 38 [2021-06-05 04:23:43,244 INFO L226 Difference]: Without dead ends: 38 [2021-06-05 04:23:43,244 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:23:43,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-06-05 04:23:43,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 30. [2021-06-05 04:23:43,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:43,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 58 transitions. [2021-06-05 04:23:43,247 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 58 transitions. Word has length 11 [2021-06-05 04:23:43,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:23:43,247 INFO L482 AbstractCegarLoop]: Abstraction has 30 states and 58 transitions. [2021-06-05 04:23:43,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:43,248 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 58 transitions. [2021-06-05 04:23:43,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 04:23:43,248 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:23:43,248 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:23:43,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-05 04:23:43,249 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:23:43,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:23:43,249 INFO L82 PathProgramCache]: Analyzing trace with hash 617529826, now seen corresponding path program 4 times [2021-06-05 04:23:43,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:23:43,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403091931] [2021-06-05 04:23:43,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:23:43,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:23:43,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:23:43,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:23:43,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403091931] [2021-06-05 04:23:43,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403091931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:23:43,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156586357] [2021-06-05 04:23:43,282 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:23:43,316 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:23:43,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:23:43,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 04:23:43,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:23:43,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:23:43,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156586357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:23:43,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:23:43,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 04:23:43,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225336501] [2021-06-05 04:23:43,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 04:23:43,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:23:43,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 04:23:43,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 04:23:43,365 INFO L87 Difference]: Start difference. First operand 30 states and 58 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:43,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:23:43,430 INFO L93 Difference]: Finished difference Result 42 states and 78 transitions. [2021-06-05 04:23:43,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 04:23:43,431 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 04:23:43,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:23:43,438 INFO L225 Difference]: With dead ends: 42 [2021-06-05 04:23:43,438 INFO L226 Difference]: Without dead ends: 42 [2021-06-05 04:23:43,438 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 47.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:23:43,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-06-05 04:23:43,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 29. [2021-06-05 04:23:43,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:43,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 57 transitions. [2021-06-05 04:23:43,442 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 57 transitions. Word has length 11 [2021-06-05 04:23:43,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:23:43,442 INFO L482 AbstractCegarLoop]: Abstraction has 29 states and 57 transitions. [2021-06-05 04:23:43,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:43,443 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 57 transitions. [2021-06-05 04:23:43,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 04:23:43,443 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:23:43,443 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:23:43,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:23:43,644 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:23:43,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:23:43,645 INFO L82 PathProgramCache]: Analyzing trace with hash -2019919942, now seen corresponding path program 4 times [2021-06-05 04:23:43,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:23:43,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141036807] [2021-06-05 04:23:43,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:23:43,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:23:43,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:23:43,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:23:43,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141036807] [2021-06-05 04:23:43,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141036807] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:23:43,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:23:43,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 04:23:43,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54867267] [2021-06-05 04:23:43,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 04:23:43,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:23:43,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 04:23:43,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:23:43,687 INFO L87 Difference]: Start difference. First operand 29 states and 57 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:43,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:23:43,734 INFO L93 Difference]: Finished difference Result 41 states and 74 transitions. [2021-06-05 04:23:43,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 04:23:43,734 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 04:23:43,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:23:43,735 INFO L225 Difference]: With dead ends: 41 [2021-06-05 04:23:43,735 INFO L226 Difference]: Without dead ends: 39 [2021-06-05 04:23:43,735 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:23:43,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-06-05 04:23:43,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 29. [2021-06-05 04:23:43,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:43,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 56 transitions. [2021-06-05 04:23:43,738 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 56 transitions. Word has length 11 [2021-06-05 04:23:43,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:23:43,739 INFO L482 AbstractCegarLoop]: Abstraction has 29 states and 56 transitions. [2021-06-05 04:23:43,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:43,739 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 56 transitions. [2021-06-05 04:23:43,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 04:23:43,739 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:23:43,740 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:23:43,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-05 04:23:43,740 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:23:43,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:23:43,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1491865152, now seen corresponding path program 5 times [2021-06-05 04:23:43,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:23:43,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948881035] [2021-06-05 04:23:43,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:23:43,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:23:43,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:23:43,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:23:43,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948881035] [2021-06-05 04:23:43,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948881035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:23:43,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023152615] [2021-06-05 04:23:43,796 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:23:43,827 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:23:43,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:23:43,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 04:23:43,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:23:43,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:23:43,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023152615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:23:43,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:23:43,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 04:23:43,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209826963] [2021-06-05 04:23:43,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:23:43,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:23:43,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:23:43,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:23:43,907 INFO L87 Difference]: Start difference. First operand 29 states and 56 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:43,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:23:43,961 INFO L93 Difference]: Finished difference Result 44 states and 80 transitions. [2021-06-05 04:23:43,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 04:23:43,961 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 04:23:43,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:23:43,963 INFO L225 Difference]: With dead ends: 44 [2021-06-05 04:23:43,963 INFO L226 Difference]: Without dead ends: 44 [2021-06-05 04:23:43,963 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 53.2ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:23:43,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-06-05 04:23:43,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 29. [2021-06-05 04:23:43,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:43,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 56 transitions. [2021-06-05 04:23:43,972 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 56 transitions. Word has length 11 [2021-06-05 04:23:43,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:23:43,972 INFO L482 AbstractCegarLoop]: Abstraction has 29 states and 56 transitions. [2021-06-05 04:23:43,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:43,972 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 56 transitions. [2021-06-05 04:23:43,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 04:23:43,973 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:23:43,973 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:23:44,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:23:44,185 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:23:44,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:23:44,186 INFO L82 PathProgramCache]: Analyzing trace with hash -2001485916, now seen corresponding path program 5 times [2021-06-05 04:23:44,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:23:44,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721729490] [2021-06-05 04:23:44,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:23:44,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:23:44,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:23:44,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:23:44,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721729490] [2021-06-05 04:23:44,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721729490] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:23:44,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:23:44,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 04:23:44,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360626757] [2021-06-05 04:23:44,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 04:23:44,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:23:44,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 04:23:44,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:23:44,229 INFO L87 Difference]: Start difference. First operand 29 states and 56 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:44,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:23:44,270 INFO L93 Difference]: Finished difference Result 41 states and 73 transitions. [2021-06-05 04:23:44,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 04:23:44,273 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 04:23:44,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:23:44,273 INFO L225 Difference]: With dead ends: 41 [2021-06-05 04:23:44,273 INFO L226 Difference]: Without dead ends: 40 [2021-06-05 04:23:44,274 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:23:44,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-06-05 04:23:44,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 31. [2021-06-05 04:23:44,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:44,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 60 transitions. [2021-06-05 04:23:44,276 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 60 transitions. Word has length 11 [2021-06-05 04:23:44,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:23:44,276 INFO L482 AbstractCegarLoop]: Abstraction has 31 states and 60 transitions. [2021-06-05 04:23:44,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:44,277 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 60 transitions. [2021-06-05 04:23:44,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 04:23:44,277 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:23:44,277 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:23:44,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-05 04:23:44,277 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:23:44,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:23:44,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1195580958, now seen corresponding path program 6 times [2021-06-05 04:23:44,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:23:44,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742497835] [2021-06-05 04:23:44,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:23:44,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:23:44,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:23:44,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:23:44,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742497835] [2021-06-05 04:23:44,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742497835] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:23:44,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:23:44,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 04:23:44,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728934022] [2021-06-05 04:23:44,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 04:23:44,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:23:44,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 04:23:44,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:23:44,306 INFO L87 Difference]: Start difference. First operand 31 states and 60 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:44,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:23:44,351 INFO L93 Difference]: Finished difference Result 35 states and 65 transitions. [2021-06-05 04:23:44,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 04:23:44,352 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 04:23:44,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:23:44,353 INFO L225 Difference]: With dead ends: 35 [2021-06-05 04:23:44,353 INFO L226 Difference]: Without dead ends: 33 [2021-06-05 04:23:44,353 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:23:44,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-06-05 04:23:44,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2021-06-05 04:23:44,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:44,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 59 transitions. [2021-06-05 04:23:44,366 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 59 transitions. Word has length 11 [2021-06-05 04:23:44,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:23:44,366 INFO L482 AbstractCegarLoop]: Abstraction has 31 states and 59 transitions. [2021-06-05 04:23:44,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:44,367 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 59 transitions. [2021-06-05 04:23:44,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 04:23:44,369 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:23:44,369 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:23:44,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-05 04:23:44,370 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:23:44,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:23:44,370 INFO L82 PathProgramCache]: Analyzing trace with hash -283142210, now seen corresponding path program 6 times [2021-06-05 04:23:44,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:23:44,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762495430] [2021-06-05 04:23:44,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:23:44,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:23:44,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:23:44,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:23:44,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762495430] [2021-06-05 04:23:44,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762495430] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:23:44,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:23:44,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 04:23:44,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791176931] [2021-06-05 04:23:44,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 04:23:44,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:23:44,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 04:23:44,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:23:44,411 INFO L87 Difference]: Start difference. First operand 31 states and 59 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:44,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:23:44,457 INFO L93 Difference]: Finished difference Result 32 states and 60 transitions. [2021-06-05 04:23:44,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 04:23:44,458 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 04:23:44,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:23:44,458 INFO L225 Difference]: With dead ends: 32 [2021-06-05 04:23:44,458 INFO L226 Difference]: Without dead ends: 32 [2021-06-05 04:23:44,458 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:23:44,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-06-05 04:23:44,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2021-06-05 04:23:44,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:44,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 52 transitions. [2021-06-05 04:23:44,462 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 52 transitions. Word has length 11 [2021-06-05 04:23:44,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:23:44,462 INFO L482 AbstractCegarLoop]: Abstraction has 28 states and 52 transitions. [2021-06-05 04:23:44,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:44,463 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 52 transitions. [2021-06-05 04:23:44,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 04:23:44,463 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:23:44,463 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:23:44,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-05 04:23:44,463 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:23:44,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:23:44,464 INFO L82 PathProgramCache]: Analyzing trace with hash -466578568, now seen corresponding path program 1 times [2021-06-05 04:23:44,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:23:44,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493182168] [2021-06-05 04:23:44,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:23:44,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:23:44,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:23:44,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:23:44,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493182168] [2021-06-05 04:23:44,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493182168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:23:44,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145102665] [2021-06-05 04:23:44,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:23:44,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:23:44,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:23:44,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:23:45,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:45,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:45,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 04:23:45,251 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:23:45,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:45,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:23:45,258 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:23:45,297 INFO L628 ElimStorePlain]: treesize reduction 62, result has 44.1 percent of original size [2021-06-05 04:23:45,298 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:23:45,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:45,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:23:45,305 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:23:45,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:23:45,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:45,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 04:23:45,332 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:23:45,343 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:23:45,351 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:23:45,352 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:125, output treesize:22 [2021-06-05 04:23:45,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:23:45,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145102665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:23:45,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:23:45,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 10 [2021-06-05 04:23:45,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569728021] [2021-06-05 04:23:45,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:23:45,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:23:45,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:23:45,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:23:45,381 INFO L87 Difference]: Start difference. First operand 28 states and 52 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:45,769 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 55 [2021-06-05 04:23:46,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:23:46,094 INFO L93 Difference]: Finished difference Result 61 states and 111 transitions. [2021-06-05 04:23:46,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:23:46,095 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 04:23:46,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:23:46,095 INFO L225 Difference]: With dead ends: 61 [2021-06-05 04:23:46,095 INFO L226 Difference]: Without dead ends: 55 [2021-06-05 04:23:46,096 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 851.8ms TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:23:46,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-06-05 04:23:46,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 37. [2021-06-05 04:23:46,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 36 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:46,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 72 transitions. [2021-06-05 04:23:46,098 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 72 transitions. Word has length 12 [2021-06-05 04:23:46,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:23:46,098 INFO L482 AbstractCegarLoop]: Abstraction has 37 states and 72 transitions. [2021-06-05 04:23:46,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:46,098 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 72 transitions. [2021-06-05 04:23:46,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 04:23:46,099 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:23:46,099 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:23:46,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 04:23:46,313 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:23:46,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:23:46,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1514371190, now seen corresponding path program 2 times [2021-06-05 04:23:46,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:23:46,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163338319] [2021-06-05 04:23:46,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:23:46,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:23:46,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:23:46,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:23:46,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163338319] [2021-06-05 04:23:46,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163338319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:23:46,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798221322] [2021-06-05 04:23:46,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:23:46,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:23:46,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:23:46,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:23:46,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:23:46,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:46,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:46,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 04:23:46,908 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:23:46,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:46,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:23:46,915 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:23:46,938 INFO L628 ElimStorePlain]: treesize reduction 104, result has 12.6 percent of original size [2021-06-05 04:23:46,938 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:23:46,938 INFO L518 ElimStorePlain]: Eliminatee v_prenex_6 vanished before elimination [2021-06-05 04:23:46,938 INFO L518 ElimStorePlain]: Eliminatee v_prenex_7 vanished before elimination [2021-06-05 04:23:46,940 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:23:46,940 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:133, output treesize:11 [2021-06-05 04:23:46,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:23:46,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798221322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:23:46,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:23:46,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2021-06-05 04:23:46,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146735045] [2021-06-05 04:23:46,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:23:46,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:23:46,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:23:46,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:23:46,970 INFO L87 Difference]: Start difference. First operand 37 states and 72 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:47,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:23:47,290 INFO L93 Difference]: Finished difference Result 48 states and 92 transitions. [2021-06-05 04:23:47,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:23:47,290 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 04:23:47,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:23:47,291 INFO L225 Difference]: With dead ends: 48 [2021-06-05 04:23:47,291 INFO L226 Difference]: Without dead ends: 45 [2021-06-05 04:23:47,291 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 499.7ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:23:47,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-06-05 04:23:47,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2021-06-05 04:23:47,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 2.0) internal successors, (78), 39 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:47,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 78 transitions. [2021-06-05 04:23:47,293 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 78 transitions. Word has length 12 [2021-06-05 04:23:47,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:23:47,293 INFO L482 AbstractCegarLoop]: Abstraction has 40 states and 78 transitions. [2021-06-05 04:23:47,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:47,293 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 78 transitions. [2021-06-05 04:23:47,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 04:23:47,294 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:23:47,294 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:23:47,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:23:47,509 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:23:47,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:23:47,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1506640792, now seen corresponding path program 3 times [2021-06-05 04:23:47,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:23:47,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143281525] [2021-06-05 04:23:47,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:23:47,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:23:47,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:23:47,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:23:47,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143281525] [2021-06-05 04:23:47,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143281525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:23:47,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643365620] [2021-06-05 04:23:47,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:23:47,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:23:47,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:23:47,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:23:47,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:23:47,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:47,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:47,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:23:47,922 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:23:47,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:47,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:47,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 04:23:47,929 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:23:47,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:47,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:47,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 04:23:47,939 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:23:47,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:47,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 04:23:47,946 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:23:48,012 INFO L628 ElimStorePlain]: treesize reduction 93, result has 44.0 percent of original size [2021-06-05 04:23:48,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:48,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 04:23:48,017 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:23:48,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:23:48,041 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:23:48,042 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:201, output treesize:62 [2021-06-05 04:23:48,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:23:48,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643365620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:23:48,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:23:48,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:23:48,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779858779] [2021-06-05 04:23:48,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:23:48,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:23:48,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:23:48,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:23:48,184 INFO L87 Difference]: Start difference. First operand 40 states and 78 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:48,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:23:48,358 INFO L93 Difference]: Finished difference Result 51 states and 98 transitions. [2021-06-05 04:23:48,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 04:23:48,359 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 04:23:48,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:23:48,359 INFO L225 Difference]: With dead ends: 51 [2021-06-05 04:23:48,359 INFO L226 Difference]: Without dead ends: 48 [2021-06-05 04:23:48,360 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 425.4ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:23:48,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-06-05 04:23:48,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 40. [2021-06-05 04:23:48,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 2.0) internal successors, (78), 39 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:48,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 78 transitions. [2021-06-05 04:23:48,362 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 78 transitions. Word has length 12 [2021-06-05 04:23:48,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:23:48,362 INFO L482 AbstractCegarLoop]: Abstraction has 40 states and 78 transitions. [2021-06-05 04:23:48,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:48,363 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 78 transitions. [2021-06-05 04:23:48,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 04:23:48,363 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:23:48,363 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:23:48,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:23:48,573 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:23:48,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:23:48,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1983860354, now seen corresponding path program 4 times [2021-06-05 04:23:48,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:23:48,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222094470] [2021-06-05 04:23:48,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:23:48,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:23:48,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:23:48,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:23:48,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222094470] [2021-06-05 04:23:48,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222094470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:23:48,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535012830] [2021-06-05 04:23:48,782 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:23:48,806 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:23:48,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:23:48,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:23:48,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:23:48,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:48,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:48,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 04:23:48,994 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:23:48,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:48,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:23:48,999 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:23:49,013 INFO L628 ElimStorePlain]: treesize reduction 79, result has 12.2 percent of original size [2021-06-05 04:23:49,014 INFO L518 ElimStorePlain]: Eliminatee v_prenex_10 vanished before elimination [2021-06-05 04:23:49,014 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:23:49,014 INFO L518 ElimStorePlain]: Eliminatee v_prenex_11 vanished before elimination [2021-06-05 04:23:49,014 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:23:49,014 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:107, output treesize:11 [2021-06-05 04:23:49,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:23:49,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535012830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:23:49,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:23:49,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-06-05 04:23:49,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991704255] [2021-06-05 04:23:49,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:23:49,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:23:49,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:23:49,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:23:49,038 INFO L87 Difference]: Start difference. First operand 40 states and 78 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:49,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:23:49,201 INFO L93 Difference]: Finished difference Result 64 states and 121 transitions. [2021-06-05 04:23:49,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:23:49,213 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 04:23:49,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:23:49,214 INFO L225 Difference]: With dead ends: 64 [2021-06-05 04:23:49,214 INFO L226 Difference]: Without dead ends: 61 [2021-06-05 04:23:49,214 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 311.3ms TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:23:49,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-06-05 04:23:49,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 42. [2021-06-05 04:23:49,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.0) internal successors, (82), 41 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:49,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 82 transitions. [2021-06-05 04:23:49,216 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 82 transitions. Word has length 12 [2021-06-05 04:23:49,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:23:49,216 INFO L482 AbstractCegarLoop]: Abstraction has 42 states and 82 transitions. [2021-06-05 04:23:49,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:49,217 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 82 transitions. [2021-06-05 04:23:49,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 04:23:49,222 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:23:49,222 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:23:49,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 04:23:49,446 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:23:49,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:23:49,446 INFO L82 PathProgramCache]: Analyzing trace with hash -976515612, now seen corresponding path program 5 times [2021-06-05 04:23:49,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:23:49,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744256386] [2021-06-05 04:23:49,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:23:49,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:23:49,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:23:49,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:23:49,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744256386] [2021-06-05 04:23:49,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744256386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:23:49,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234233027] [2021-06-05 04:23:49,720 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:23:49,745 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:23:49,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:23:49,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:23:49,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:23:49,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:49,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:49,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 04:23:49,983 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:23:49,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:49,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-05 04:23:49,988 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:23:50,027 INFO L628 ElimStorePlain]: treesize reduction 58, result has 50.0 percent of original size [2021-06-05 04:23:50,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:50,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 04:23:50,032 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:23:50,046 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:23:50,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:23:50,050 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:23:50,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:23:50,063 INFO L518 ElimStorePlain]: Eliminatee v_prenex_13 vanished before elimination [2021-06-05 04:23:50,065 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:23:50,065 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-06-05 04:23:50,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:23:50,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234233027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:23:50,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:23:50,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2021-06-05 04:23:50,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911695336] [2021-06-05 04:23:50,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:23:50,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:23:50,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:23:50,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:23:50,100 INFO L87 Difference]: Start difference. First operand 42 states and 82 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:50,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:23:50,413 INFO L93 Difference]: Finished difference Result 53 states and 102 transitions. [2021-06-05 04:23:50,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:23:50,414 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 04:23:50,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:23:50,414 INFO L225 Difference]: With dead ends: 53 [2021-06-05 04:23:50,414 INFO L226 Difference]: Without dead ends: 50 [2021-06-05 04:23:50,414 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 541.0ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:23:50,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-06-05 04:23:50,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2021-06-05 04:23:50,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.0) internal successors, (82), 41 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:50,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 82 transitions. [2021-06-05 04:23:50,416 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 82 transitions. Word has length 12 [2021-06-05 04:23:50,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:23:50,416 INFO L482 AbstractCegarLoop]: Abstraction has 42 states and 82 transitions. [2021-06-05 04:23:50,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:50,416 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 82 transitions. [2021-06-05 04:23:50,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 04:23:50,417 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:23:50,417 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:23:50,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:23:50,633 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:23:50,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:23:50,633 INFO L82 PathProgramCache]: Analyzing trace with hash -968785214, now seen corresponding path program 6 times [2021-06-05 04:23:50,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:23:50,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441272751] [2021-06-05 04:23:50,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:23:50,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:23:50,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:23:50,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:23:50,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441272751] [2021-06-05 04:23:50,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441272751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:23:50,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001578058] [2021-06-05 04:23:50,897 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:23:50,939 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:23:50,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:23:50,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:23:50,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:23:51,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:51,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:51,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 04:23:51,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:23:51,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:51,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:23:51,101 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:23:51,122 INFO L628 ElimStorePlain]: treesize reduction 96, result has 13.5 percent of original size [2021-06-05 04:23:51,122 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:23:51,122 INFO L518 ElimStorePlain]: Eliminatee v_prenex_16 vanished before elimination [2021-06-05 04:23:51,122 INFO L518 ElimStorePlain]: Eliminatee v_prenex_15 vanished before elimination [2021-06-05 04:23:51,123 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:23:51,124 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:125, output treesize:11 [2021-06-05 04:23:51,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:23:51,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001578058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:23:51,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:23:51,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-06-05 04:23:51,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420600830] [2021-06-05 04:23:51,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:23:51,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:23:51,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:23:51,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:23:51,152 INFO L87 Difference]: Start difference. First operand 42 states and 82 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:51,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:23:51,375 INFO L93 Difference]: Finished difference Result 54 states and 104 transitions. [2021-06-05 04:23:51,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 04:23:51,375 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 04:23:51,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:23:51,376 INFO L225 Difference]: With dead ends: 54 [2021-06-05 04:23:51,376 INFO L226 Difference]: Without dead ends: 51 [2021-06-05 04:23:51,376 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 370.4ms TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:23:51,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-06-05 04:23:51,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 41. [2021-06-05 04:23:51,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 2.0) internal successors, (80), 40 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:51,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 80 transitions. [2021-06-05 04:23:51,378 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 80 transitions. Word has length 12 [2021-06-05 04:23:51,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:23:51,378 INFO L482 AbstractCegarLoop]: Abstraction has 41 states and 80 transitions. [2021-06-05 04:23:51,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:51,378 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 80 transitions. [2021-06-05 04:23:51,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:23:51,379 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:23:51,379 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:23:51,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:23:51,587 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:23:51,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:23:51,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1580118726, now seen corresponding path program 7 times [2021-06-05 04:23:51,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:23:51,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255396101] [2021-06-05 04:23:51,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:23:51,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:23:51,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:23:51,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:23:51,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255396101] [2021-06-05 04:23:51,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255396101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:23:51,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342657197] [2021-06-05 04:23:51,649 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:23:51,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:23:51,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 04:23:51,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:23:51,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:23:51,772 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:23:51,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:51,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:23:51,776 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:23:51,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:51,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:23:51,781 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:23:51,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:23:51,784 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:23:51,787 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:23:51,788 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:23:51,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:23:51,791 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:23:51,814 INFO L628 ElimStorePlain]: treesize reduction 26, result has 43.5 percent of original size [2021-06-05 04:23:51,814 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:23:51,816 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:23:51,816 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:107, output treesize:20 [2021-06-05 04:23:51,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:23:51,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342657197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:23:51,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:23:51,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:23:51,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271507640] [2021-06-05 04:23:51,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:23:51,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:23:51,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:23:51,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:23:51,849 INFO L87 Difference]: Start difference. First operand 41 states and 80 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:52,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:23:52,047 INFO L93 Difference]: Finished difference Result 57 states and 103 transitions. [2021-06-05 04:23:52,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:23:52,047 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 04:23:52,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:23:52,047 INFO L225 Difference]: With dead ends: 57 [2021-06-05 04:23:52,047 INFO L226 Difference]: Without dead ends: 50 [2021-06-05 04:23:52,048 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 227.1ms TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:23:52,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-06-05 04:23:52,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 38. [2021-06-05 04:23:52,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 37 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:52,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 74 transitions. [2021-06-05 04:23:52,049 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 74 transitions. Word has length 13 [2021-06-05 04:23:52,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:23:52,049 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 74 transitions. [2021-06-05 04:23:52,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:52,049 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 74 transitions. [2021-06-05 04:23:52,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:23:52,050 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:23:52,050 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:23:52,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-05 04:23:52,253 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:23:52,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:23:52,253 INFO L82 PathProgramCache]: Analyzing trace with hash -4067700, now seen corresponding path program 8 times [2021-06-05 04:23:52,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:23:52,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620366475] [2021-06-05 04:23:52,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:23:52,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:23:52,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:23:52,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:23:52,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620366475] [2021-06-05 04:23:52,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620366475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:23:52,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572340955] [2021-06-05 04:23:52,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:23:52,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:23:52,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:23:52,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 04:23:52,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:23:52,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:52,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:23:52,426 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:23:52,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:23:52,429 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:23:52,451 INFO L628 ElimStorePlain]: treesize reduction 27, result has 30.8 percent of original size [2021-06-05 04:23:52,451 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:23:52,452 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:23:52,452 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:12 [2021-06-05 04:23:52,473 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:23:52,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572340955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:23:52,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:23:52,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:23:52,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529274060] [2021-06-05 04:23:52,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:23:52,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:23:52,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:23:52,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:23:52,474 INFO L87 Difference]: Start difference. First operand 38 states and 74 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:52,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:23:52,560 INFO L93 Difference]: Finished difference Result 56 states and 105 transitions. [2021-06-05 04:23:52,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:23:52,561 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 04:23:52,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:23:52,563 INFO L225 Difference]: With dead ends: 56 [2021-06-05 04:23:52,563 INFO L226 Difference]: Without dead ends: 56 [2021-06-05 04:23:52,563 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 112.0ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:23:52,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-06-05 04:23:52,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 39. [2021-06-05 04:23:52,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:52,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 77 transitions. [2021-06-05 04:23:52,566 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 77 transitions. Word has length 13 [2021-06-05 04:23:52,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:23:52,566 INFO L482 AbstractCegarLoop]: Abstraction has 39 states and 77 transitions. [2021-06-05 04:23:52,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:52,566 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 77 transitions. [2021-06-05 04:23:52,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:23:52,568 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:23:52,568 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:23:52,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:23:52,791 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:23:52,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:23:52,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1853476550, now seen corresponding path program 9 times [2021-06-05 04:23:52,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:23:52,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082741799] [2021-06-05 04:23:52,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:23:52,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:23:52,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:23:52,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:23:52,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082741799] [2021-06-05 04:23:52,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082741799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:23:52,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337285074] [2021-06-05 04:23:52,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:23:52,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:23:52,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:23:52,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 04:23:52,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:23:52,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:52,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:52,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:23:52,985 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:23:52,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:52,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:52,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:23:52,990 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:23:52,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:52,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:52,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:23:52,997 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:23:53,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:53,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:23:53,002 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:23:53,042 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:23:53,043 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:23:53,044 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:23:53,044 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:23:53,099 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:23:53,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337285074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:23:53,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:23:53,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:23:53,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484341834] [2021-06-05 04:23:53,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:23:53,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:23:53,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:23:53,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:23:53,101 INFO L87 Difference]: Start difference. First operand 39 states and 77 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:53,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:23:53,272 INFO L93 Difference]: Finished difference Result 96 states and 169 transitions. [2021-06-05 04:23:53,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:23:53,273 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 04:23:53,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:23:53,273 INFO L225 Difference]: With dead ends: 96 [2021-06-05 04:23:53,273 INFO L226 Difference]: Without dead ends: 96 [2021-06-05 04:23:53,274 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 232.4ms TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:23:53,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-06-05 04:23:53,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 43. [2021-06-05 04:23:53,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.1904761904761907) internal successors, (92), 42 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:53,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 92 transitions. [2021-06-05 04:23:53,276 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 92 transitions. Word has length 13 [2021-06-05 04:23:53,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:23:53,276 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 92 transitions. [2021-06-05 04:23:53,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:53,276 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 92 transitions. [2021-06-05 04:23:53,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:23:53,276 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:23:53,276 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:23:53,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-06-05 04:23:53,493 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:23:53,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:23:53,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1051860322, now seen corresponding path program 10 times [2021-06-05 04:23:53,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:23:53,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67380774] [2021-06-05 04:23:53,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:23:53,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:23:53,570 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:23:53,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:23:53,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67380774] [2021-06-05 04:23:53,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67380774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:23:53,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407994490] [2021-06-05 04:23:53,571 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:23:53,598 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:23:53,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:23:53,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 04:23:53,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:23:53,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:53,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:53,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:23:53,674 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:23:53,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:53,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:53,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:23:53,678 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:23:53,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:53,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:53,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:23:53,683 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:23:53,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:53,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:23:53,687 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:23:53,727 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:23:53,727 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:23:53,728 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:23:53,728 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:23:53,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:23:53,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407994490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:23:53,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:23:53,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:23:53,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045416406] [2021-06-05 04:23:53,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:23:53,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:23:53,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:23:53,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:23:53,807 INFO L87 Difference]: Start difference. First operand 43 states and 92 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:54,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:23:54,312 INFO L93 Difference]: Finished difference Result 89 states and 163 transitions. [2021-06-05 04:23:54,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:23:54,312 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 04:23:54,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:23:54,313 INFO L225 Difference]: With dead ends: 89 [2021-06-05 04:23:54,313 INFO L226 Difference]: Without dead ends: 84 [2021-06-05 04:23:54,313 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 564.3ms TimeCoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:23:54,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-06-05 04:23:54,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 45. [2021-06-05 04:23:54,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 2.1363636363636362) internal successors, (94), 44 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:54,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 94 transitions. [2021-06-05 04:23:54,315 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 94 transitions. Word has length 13 [2021-06-05 04:23:54,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:23:54,315 INFO L482 AbstractCegarLoop]: Abstraction has 45 states and 94 transitions. [2021-06-05 04:23:54,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:54,316 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 94 transitions. [2021-06-05 04:23:54,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:23:54,316 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:23:54,316 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:23:54,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:23:54,540 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:23:54,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:23:54,540 INFO L82 PathProgramCache]: Analyzing trace with hash 666483384, now seen corresponding path program 11 times [2021-06-05 04:23:54,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:23:54,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867282886] [2021-06-05 04:23:54,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:23:54,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:23:54,629 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:23:54,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:23:54,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867282886] [2021-06-05 04:23:54,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867282886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:23:54,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938043012] [2021-06-05 04:23:54,629 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:23:54,654 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:23:54,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:23:54,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 04:23:54,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:23:54,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:54,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:54,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:23:54,750 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:23:54,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:54,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:54,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:23:54,755 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:23:54,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:54,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:54,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:23:54,760 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:23:54,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:54,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:23:54,765 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:23:54,804 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:23:54,805 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:23:54,806 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:23:54,806 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:23:54,858 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:23:54,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938043012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:23:54,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:23:54,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:23:54,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776598614] [2021-06-05 04:23:54,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:23:54,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:23:54,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:23:54,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:23:54,860 INFO L87 Difference]: Start difference. First operand 45 states and 94 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:55,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:23:55,132 INFO L93 Difference]: Finished difference Result 83 states and 156 transitions. [2021-06-05 04:23:55,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:23:55,133 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 04:23:55,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:23:55,133 INFO L225 Difference]: With dead ends: 83 [2021-06-05 04:23:55,133 INFO L226 Difference]: Without dead ends: 83 [2021-06-05 04:23:55,133 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 319.3ms TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:23:55,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-06-05 04:23:55,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 44. [2021-06-05 04:23:55,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 43 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:55,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 89 transitions. [2021-06-05 04:23:55,135 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 89 transitions. Word has length 13 [2021-06-05 04:23:55,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:23:55,136 INFO L482 AbstractCegarLoop]: Abstraction has 44 states and 89 transitions. [2021-06-05 04:23:55,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:55,136 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 89 transitions. [2021-06-05 04:23:55,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:23:55,136 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:23:55,136 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:23:55,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-05 04:23:55,341 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:23:55,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:23:55,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1044129924, now seen corresponding path program 12 times [2021-06-05 04:23:55,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:23:55,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942622137] [2021-06-05 04:23:55,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:23:55,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:23:55,414 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:23:55,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:23:55,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942622137] [2021-06-05 04:23:55,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942622137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:23:55,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14930488] [2021-06-05 04:23:55,415 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:23:55,444 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:23:55,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:23:55,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 04:23:55,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:23:55,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:55,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:55,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:23:55,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:23:55,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:55,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:23:55,552 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:23:55,579 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:23:55,580 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:23:55,581 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:23:55,581 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:23:55,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:23:55,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14930488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:23:55,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:23:55,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:23:55,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283787236] [2021-06-05 04:23:55,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:23:55,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:23:55,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:23:55,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:23:55,604 INFO L87 Difference]: Start difference. First operand 44 states and 89 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:55,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:23:55,665 INFO L93 Difference]: Finished difference Result 67 states and 130 transitions. [2021-06-05 04:23:55,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:23:55,665 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 04:23:55,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:23:55,665 INFO L225 Difference]: With dead ends: 67 [2021-06-05 04:23:55,666 INFO L226 Difference]: Without dead ends: 67 [2021-06-05 04:23:55,666 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 123.7ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:23:55,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-06-05 04:23:55,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 44. [2021-06-05 04:23:55,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 43 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:55,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 89 transitions. [2021-06-05 04:23:55,672 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 89 transitions. Word has length 13 [2021-06-05 04:23:55,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:23:55,672 INFO L482 AbstractCegarLoop]: Abstraction has 44 states and 89 transitions. [2021-06-05 04:23:55,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:55,673 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 89 transitions. [2021-06-05 04:23:55,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:23:55,673 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:23:55,673 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:23:55,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:23:55,897 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:23:55,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:23:55,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1239139006, now seen corresponding path program 13 times [2021-06-05 04:23:55,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:23:55,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53853973] [2021-06-05 04:23:55,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:23:55,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:23:55,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:23:55,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:23:55,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53853973] [2021-06-05 04:23:55,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53853973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:23:55,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365549209] [2021-06-05 04:23:55,956 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:23:55,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:23:55,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 04:23:56,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:23:56,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:56,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:56,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:23:56,062 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:23:56,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:56,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:23:56,066 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:23:56,100 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-06-05 04:23:56,100 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:23:56,100 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:23:56,100 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-06-05 04:23:56,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:23:56,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365549209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:23:56,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:23:56,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:23:56,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484696399] [2021-06-05 04:23:56,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:23:56,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:23:56,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:23:56,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:23:56,121 INFO L87 Difference]: Start difference. First operand 44 states and 89 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:56,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:23:56,205 INFO L93 Difference]: Finished difference Result 77 states and 149 transitions. [2021-06-05 04:23:56,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:23:56,205 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 04:23:56,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:23:56,206 INFO L225 Difference]: With dead ends: 77 [2021-06-05 04:23:56,206 INFO L226 Difference]: Without dead ends: 77 [2021-06-05 04:23:56,206 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 89.2ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:23:56,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-06-05 04:23:56,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 51. [2021-06-05 04:23:56,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 2.22) internal successors, (111), 50 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:56,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 111 transitions. [2021-06-05 04:23:56,208 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 111 transitions. Word has length 13 [2021-06-05 04:23:56,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:23:56,208 INFO L482 AbstractCegarLoop]: Abstraction has 51 states and 111 transitions. [2021-06-05 04:23:56,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:56,208 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 111 transitions. [2021-06-05 04:23:56,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:23:56,208 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:23:56,208 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:23:56,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-05 04:23:56,413 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:23:56,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:23:56,413 INFO L82 PathProgramCache]: Analyzing trace with hash 319438298, now seen corresponding path program 14 times [2021-06-05 04:23:56,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:23:56,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601037911] [2021-06-05 04:23:56,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:23:56,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:23:56,467 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:23:56,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:23:56,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601037911] [2021-06-05 04:23:56,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601037911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:23:56,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298728591] [2021-06-05 04:23:56,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:23:56,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:23:56,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:23:56,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 04:23:56,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:23:56,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:56,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:56,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:23:56,564 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:23:56,566 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:23:56,567 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:23:56,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:23:56,571 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:23:56,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:56,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:56,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:23:56,575 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:23:56,578 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:23:56,578 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:23:56,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:23:56,582 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:23:56,615 INFO L628 ElimStorePlain]: treesize reduction 21, result has 58.0 percent of original size [2021-06-05 04:23:56,615 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:23:56,616 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:23:56,616 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-06-05 04:23:56,650 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:23:56,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298728591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:23:56,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:23:56,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:23:56,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131268208] [2021-06-05 04:23:56,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:23:56,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:23:56,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:23:56,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:23:56,651 INFO L87 Difference]: Start difference. First operand 51 states and 111 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:56,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:23:56,856 INFO L93 Difference]: Finished difference Result 70 states and 138 transitions. [2021-06-05 04:23:56,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:23:56,856 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 04:23:56,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:23:56,857 INFO L225 Difference]: With dead ends: 70 [2021-06-05 04:23:56,857 INFO L226 Difference]: Without dead ends: 68 [2021-06-05 04:23:56,857 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 203.8ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:23:56,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-06-05 04:23:56,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 52. [2021-06-05 04:23:56,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.196078431372549) internal successors, (112), 51 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:56,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 112 transitions. [2021-06-05 04:23:56,859 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 112 transitions. Word has length 13 [2021-06-05 04:23:56,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:23:56,859 INFO L482 AbstractCegarLoop]: Abstraction has 52 states and 112 transitions. [2021-06-05 04:23:56,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:56,859 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 112 transitions. [2021-06-05 04:23:56,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:23:56,860 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:23:56,860 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:23:57,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-06-05 04:23:57,065 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:23:57,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:23:57,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1246869404, now seen corresponding path program 15 times [2021-06-05 04:23:57,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:23:57,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844241811] [2021-06-05 04:23:57,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:23:57,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:23:57,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:23:57,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:23:57,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844241811] [2021-06-05 04:23:57,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844241811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:23:57,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51019552] [2021-06-05 04:23:57,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:23:57,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:23:57,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:23:57,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 04:23:57,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:23:57,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:57,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:57,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:23:57,233 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:23:57,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:57,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:57,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:23:57,238 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:23:57,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:57,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:57,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:23:57,243 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:23:57,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:57,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:23:57,255 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:23:57,297 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:23:57,297 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:23:57,298 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:23:57,298 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:23:57,368 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:23:57,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51019552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:23:57,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:23:57,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:23:57,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026874993] [2021-06-05 04:23:57,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:23:57,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:23:57,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:23:57,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:23:57,372 INFO L87 Difference]: Start difference. First operand 52 states and 112 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:57,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:23:57,499 INFO L93 Difference]: Finished difference Result 90 states and 163 transitions. [2021-06-05 04:23:57,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:23:57,500 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 04:23:57,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:23:57,501 INFO L225 Difference]: With dead ends: 90 [2021-06-05 04:23:57,501 INFO L226 Difference]: Without dead ends: 90 [2021-06-05 04:23:57,502 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 196.2ms TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:23:57,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-06-05 04:23:57,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 51. [2021-06-05 04:23:57,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 2.16) internal successors, (108), 50 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:57,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 108 transitions. [2021-06-05 04:23:57,504 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 108 transitions. Word has length 13 [2021-06-05 04:23:57,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:23:57,504 INFO L482 AbstractCegarLoop]: Abstraction has 51 states and 108 transitions. [2021-06-05 04:23:57,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:57,504 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 108 transitions. [2021-06-05 04:23:57,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:23:57,505 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:23:57,505 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:23:57,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:23:57,717 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:23:57,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:23:57,717 INFO L82 PathProgramCache]: Analyzing trace with hash 2048485632, now seen corresponding path program 16 times [2021-06-05 04:23:57,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:23:57,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461699648] [2021-06-05 04:23:57,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:23:57,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:23:57,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:23:57,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:23:57,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461699648] [2021-06-05 04:23:57,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461699648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:23:57,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211070878] [2021-06-05 04:23:57,800 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:23:57,830 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:23:57,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:23:57,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 04:23:57,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:23:57,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:57,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:57,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:23:57,896 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:23:57,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:57,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:57,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:23:57,900 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:23:57,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:57,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:57,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:23:57,905 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:23:57,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:57,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:23:57,909 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:23:57,948 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:23:57,948 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:23:57,949 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:23:57,949 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:23:58,021 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:23:58,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211070878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:23:58,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:23:58,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:23:58,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451672946] [2021-06-05 04:23:58,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:23:58,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:23:58,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:23:58,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:23:58,023 INFO L87 Difference]: Start difference. First operand 51 states and 108 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:58,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:23:58,249 INFO L93 Difference]: Finished difference Result 82 states and 154 transitions. [2021-06-05 04:23:58,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:23:58,249 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 04:23:58,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:23:58,249 INFO L225 Difference]: With dead ends: 82 [2021-06-05 04:23:58,249 INFO L226 Difference]: Without dead ends: 79 [2021-06-05 04:23:58,250 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 276.6ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:23:58,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-06-05 04:23:58,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 52. [2021-06-05 04:23:58,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.156862745098039) internal successors, (110), 51 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:58,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 110 transitions. [2021-06-05 04:23:58,252 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 110 transitions. Word has length 13 [2021-06-05 04:23:58,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:23:58,252 INFO L482 AbstractCegarLoop]: Abstraction has 52 states and 110 transitions. [2021-06-05 04:23:58,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:58,252 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 110 transitions. [2021-06-05 04:23:58,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:23:58,252 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:23:58,253 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:23:58,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-06-05 04:23:58,457 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:23:58,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:23:58,457 INFO L82 PathProgramCache]: Analyzing trace with hash -528137958, now seen corresponding path program 17 times [2021-06-05 04:23:58,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:23:58,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164889845] [2021-06-05 04:23:58,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:23:58,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:23:58,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:23:58,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:23:58,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164889845] [2021-06-05 04:23:58,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164889845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:23:58,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095777488] [2021-06-05 04:23:58,520 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:23:58,546 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:23:58,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:23:58,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 04:23:58,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:23:58,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:58,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:58,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:23:58,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:23:58,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:58,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:58,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:23:58,624 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:23:58,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:58,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:58,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:23:58,629 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:23:58,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:58,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:23:58,633 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:23:58,677 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:23:58,677 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:23:58,678 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:23:58,678 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:23:58,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:23:58,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095777488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:23:58,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:23:58,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:23:58,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248007873] [2021-06-05 04:23:58,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:23:58,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:23:58,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:23:58,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:23:58,740 INFO L87 Difference]: Start difference. First operand 52 states and 110 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:58,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:23:58,894 INFO L93 Difference]: Finished difference Result 75 states and 148 transitions. [2021-06-05 04:23:58,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:23:58,894 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 04:23:58,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:23:58,895 INFO L225 Difference]: With dead ends: 75 [2021-06-05 04:23:58,896 INFO L226 Difference]: Without dead ends: 75 [2021-06-05 04:23:58,896 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 196.1ms TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:23:58,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-06-05 04:23:58,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 50. [2021-06-05 04:23:58,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 2.0816326530612246) internal successors, (102), 49 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:58,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 102 transitions. [2021-06-05 04:23:58,898 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 102 transitions. Word has length 13 [2021-06-05 04:23:58,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:23:58,898 INFO L482 AbstractCegarLoop]: Abstraction has 50 states and 102 transitions. [2021-06-05 04:23:58,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:58,898 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 102 transitions. [2021-06-05 04:23:58,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:23:58,899 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:23:58,899 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:23:59,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-05 04:23:59,116 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:23:59,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:23:59,117 INFO L82 PathProgramCache]: Analyzing trace with hash -242535592, now seen corresponding path program 18 times [2021-06-05 04:23:59,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:23:59,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818140195] [2021-06-05 04:23:59,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:23:59,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:23:59,184 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:23:59,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:23:59,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818140195] [2021-06-05 04:23:59,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818140195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:23:59,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607115598] [2021-06-05 04:23:59,185 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:23:59,216 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:23:59,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:23:59,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 04:23:59,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:23:59,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:59,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:59,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:23:59,276 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:23:59,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:59,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:59,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:23:59,281 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:23:59,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:59,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:59,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:23:59,285 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:23:59,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:59,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:23:59,289 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:23:59,326 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:23:59,326 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:23:59,327 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:23:59,327 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:23:59,405 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:23:59,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607115598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:23:59,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:23:59,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:23:59,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983187112] [2021-06-05 04:23:59,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:23:59,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:23:59,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:23:59,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:23:59,407 INFO L87 Difference]: Start difference. First operand 50 states and 102 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:59,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:23:59,534 INFO L93 Difference]: Finished difference Result 97 states and 180 transitions. [2021-06-05 04:23:59,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:23:59,535 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 04:23:59,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:23:59,535 INFO L225 Difference]: With dead ends: 97 [2021-06-05 04:23:59,535 INFO L226 Difference]: Without dead ends: 97 [2021-06-05 04:23:59,535 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 201.9ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:23:59,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-06-05 04:23:59,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 54. [2021-06-05 04:23:59,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.207547169811321) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:59,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 117 transitions. [2021-06-05 04:23:59,538 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 117 transitions. Word has length 13 [2021-06-05 04:23:59,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:23:59,538 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 117 transitions. [2021-06-05 04:23:59,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:23:59,538 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 117 transitions. [2021-06-05 04:23:59,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:23:59,538 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:23:59,538 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:23:59,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:23:59,753 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:23:59,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:23:59,753 INFO L82 PathProgramCache]: Analyzing trace with hash 559080636, now seen corresponding path program 19 times [2021-06-05 04:23:59,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:23:59,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075803427] [2021-06-05 04:23:59,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:23:59,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:23:59,825 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:23:59,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:23:59,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075803427] [2021-06-05 04:23:59,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075803427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:23:59,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237995105] [2021-06-05 04:23:59,825 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:23:59,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:23:59,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 04:23:59,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:23:59,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:59,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:59,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:23:59,911 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:23:59,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:59,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:59,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:23:59,916 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:23:59,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:59,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:59,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:23:59,920 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:23:59,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:23:59,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:23:59,924 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:23:59,963 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:23:59,963 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:23:59,964 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:23:59,964 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:24:00,042 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:00,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237995105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:00,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:24:00,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:24:00,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368989801] [2021-06-05 04:24:00,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:24:00,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:24:00,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:24:00,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:24:00,044 INFO L87 Difference]: Start difference. First operand 54 states and 117 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:00,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:24:00,415 INFO L93 Difference]: Finished difference Result 91 states and 169 transitions. [2021-06-05 04:24:00,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:24:00,416 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 04:24:00,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:24:00,416 INFO L225 Difference]: With dead ends: 91 [2021-06-05 04:24:00,416 INFO L226 Difference]: Without dead ends: 86 [2021-06-05 04:24:00,416 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 418.5ms TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:24:00,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-06-05 04:24:00,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 55. [2021-06-05 04:24:00,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 2.185185185185185) internal successors, (118), 54 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:00,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 118 transitions. [2021-06-05 04:24:00,419 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 118 transitions. Word has length 13 [2021-06-05 04:24:00,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:24:00,420 INFO L482 AbstractCegarLoop]: Abstraction has 55 states and 118 transitions. [2021-06-05 04:24:00,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:00,420 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 118 transitions. [2021-06-05 04:24:00,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:24:00,420 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:24:00,420 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:24:00,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-05 04:24:00,625 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:24:00,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:24:00,625 INFO L82 PathProgramCache]: Analyzing trace with hash -2017542954, now seen corresponding path program 20 times [2021-06-05 04:24:00,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:24:00,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328041814] [2021-06-05 04:24:00,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:24:00,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:00,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:00,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:24:00,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328041814] [2021-06-05 04:24:00,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328041814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:00,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695760940] [2021-06-05 04:24:00,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:00,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:24:00,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:24:00,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 04:24:00,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:24:00,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:00,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:00,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:24:00,799 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:00,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:00,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:00,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:00,806 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:00,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:00,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:00,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:24:00,811 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:00,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:00,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:00,816 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:00,861 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:24:00,861 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:24:00,862 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:24:00,862 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:24:00,916 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:00,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695760940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:00,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:24:00,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:24:00,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488388905] [2021-06-05 04:24:00,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:24:00,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:24:00,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:24:00,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:24:00,918 INFO L87 Difference]: Start difference. First operand 55 states and 118 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:01,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:24:01,136 INFO L93 Difference]: Finished difference Result 80 states and 158 transitions. [2021-06-05 04:24:01,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:24:01,136 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 04:24:01,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:24:01,137 INFO L225 Difference]: With dead ends: 80 [2021-06-05 04:24:01,137 INFO L226 Difference]: Without dead ends: 80 [2021-06-05 04:24:01,137 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 284.8ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:24:01,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-06-05 04:24:01,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 54. [2021-06-05 04:24:01,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:01,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 113 transitions. [2021-06-05 04:24:01,139 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 113 transitions. Word has length 13 [2021-06-05 04:24:01,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:24:01,139 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 113 transitions. [2021-06-05 04:24:01,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:01,139 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 113 transitions. [2021-06-05 04:24:01,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:24:01,139 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:24:01,139 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:24:01,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:01,341 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:24:01,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:24:01,341 INFO L82 PathProgramCache]: Analyzing trace with hash 566811034, now seen corresponding path program 21 times [2021-06-05 04:24:01,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:24:01,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289265085] [2021-06-05 04:24:01,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:24:01,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:01,404 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:01,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:24:01,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289265085] [2021-06-05 04:24:01,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289265085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:01,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854148228] [2021-06-05 04:24:01,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:01,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:24:01,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:24:01,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 04:24:01,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:24:01,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:01,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:01,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:01,556 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:01,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:01,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:24:01,561 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:01,585 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:24:01,585 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:24:01,586 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:24:01,586 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:24:01,607 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:01,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854148228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:01,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:24:01,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:24:01,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258382441] [2021-06-05 04:24:01,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:24:01,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:24:01,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:24:01,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:24:01,608 INFO L87 Difference]: Start difference. First operand 54 states and 113 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:01,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:24:01,685 INFO L93 Difference]: Finished difference Result 80 states and 158 transitions. [2021-06-05 04:24:01,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:24:01,685 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 04:24:01,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:24:01,686 INFO L225 Difference]: With dead ends: 80 [2021-06-05 04:24:01,686 INFO L226 Difference]: Without dead ends: 80 [2021-06-05 04:24:01,686 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 104.1ms TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:24:01,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-06-05 04:24:01,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 54. [2021-06-05 04:24:01,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:01,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 113 transitions. [2021-06-05 04:24:01,688 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 113 transitions. Word has length 13 [2021-06-05 04:24:01,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:24:01,688 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 113 transitions. [2021-06-05 04:24:01,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:01,688 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 113 transitions. [2021-06-05 04:24:01,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:24:01,688 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:24:01,689 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:24:01,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-06-05 04:24:01,893 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:24:01,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:24:01,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1546997946, now seen corresponding path program 22 times [2021-06-05 04:24:01,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:24:01,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119697525] [2021-06-05 04:24:01,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:24:01,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:01,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:01,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:24:01,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119697525] [2021-06-05 04:24:01,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119697525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:01,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948166273] [2021-06-05 04:24:01,944 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:01,967 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:24:01,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:24:01,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 04:24:01,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:24:02,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:02,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:02,048 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:02,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:24:02,052 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:02,069 INFO L628 ElimStorePlain]: treesize reduction 27, result has 30.8 percent of original size [2021-06-05 04:24:02,069 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:24:02,070 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:24:02,070 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:12 [2021-06-05 04:24:02,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:02,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948166273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:02,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:24:02,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:24:02,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526225621] [2021-06-05 04:24:02,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:24:02,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:24:02,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:24:02,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:24:02,089 INFO L87 Difference]: Start difference. First operand 54 states and 113 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:02,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:24:02,169 INFO L93 Difference]: Finished difference Result 82 states and 165 transitions. [2021-06-05 04:24:02,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:24:02,169 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 04:24:02,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:24:02,169 INFO L225 Difference]: With dead ends: 82 [2021-06-05 04:24:02,170 INFO L226 Difference]: Without dead ends: 82 [2021-06-05 04:24:02,170 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 106.6ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:24:02,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-06-05 04:24:02,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 53. [2021-06-05 04:24:02,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 2.1538461538461537) internal successors, (112), 52 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:02,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 112 transitions. [2021-06-05 04:24:02,171 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 112 transitions. Word has length 13 [2021-06-05 04:24:02,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:24:02,171 INFO L482 AbstractCegarLoop]: Abstraction has 53 states and 112 transitions. [2021-06-05 04:24:02,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:02,172 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 112 transitions. [2021-06-05 04:24:02,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:24:02,172 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:24:02,172 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:24:02,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:02,373 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:24:02,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:24:02,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1390433762, now seen corresponding path program 23 times [2021-06-05 04:24:02,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:24:02,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348920029] [2021-06-05 04:24:02,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:24:02,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:02,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:02,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:24:02,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348920029] [2021-06-05 04:24:02,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348920029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:02,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856831312] [2021-06-05 04:24:02,425 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:02,456 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:24:02,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:24:02,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 04:24:02,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:24:02,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:24:02,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:02,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:24:02,539 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:02,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:24:02,542 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:02,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:24:02,545 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:02,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:02,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:24:02,549 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:02,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:02,553 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:02,578 INFO L628 ElimStorePlain]: treesize reduction 34, result has 37.0 percent of original size [2021-06-05 04:24:02,578 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:24:02,578 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:24:02,578 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:107, output treesize:20 [2021-06-05 04:24:02,619 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:02,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856831312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:02,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:24:02,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:24:02,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448038357] [2021-06-05 04:24:02,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:24:02,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:24:02,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:24:02,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:24:02,621 INFO L87 Difference]: Start difference. First operand 53 states and 112 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:02,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:24:02,829 INFO L93 Difference]: Finished difference Result 80 states and 158 transitions. [2021-06-05 04:24:02,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:24:02,845 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 04:24:02,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:24:02,845 INFO L225 Difference]: With dead ends: 80 [2021-06-05 04:24:02,845 INFO L226 Difference]: Without dead ends: 77 [2021-06-05 04:24:02,845 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 233.3ms TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:24:02,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-06-05 04:24:02,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 53. [2021-06-05 04:24:02,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 2.1346153846153846) internal successors, (111), 52 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:02,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 111 transitions. [2021-06-05 04:24:02,847 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 111 transitions. Word has length 13 [2021-06-05 04:24:02,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:24:02,847 INFO L482 AbstractCegarLoop]: Abstraction has 53 states and 111 transitions. [2021-06-05 04:24:02,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:02,848 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 111 transitions. [2021-06-05 04:24:02,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:24:02,848 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:24:02,848 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:24:03,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2021-06-05 04:24:03,061 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:24:03,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:24:03,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1413378020, now seen corresponding path program 24 times [2021-06-05 04:24:03,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:24:03,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710398971] [2021-06-05 04:24:03,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:24:03,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:03,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:03,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:24:03,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710398971] [2021-06-05 04:24:03,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710398971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:03,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198631335] [2021-06-05 04:24:03,114 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:03,143 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:24:03,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:24:03,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 04:24:03,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:24:03,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:03,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:03,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:03,247 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:03,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:03,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:24:03,251 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:03,278 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:24:03,279 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:24:03,280 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:24:03,280 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:24:03,301 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:03,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198631335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:03,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:24:03,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:24:03,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086181874] [2021-06-05 04:24:03,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:24:03,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:24:03,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:24:03,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:24:03,302 INFO L87 Difference]: Start difference. First operand 53 states and 111 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:03,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:24:03,376 INFO L93 Difference]: Finished difference Result 83 states and 167 transitions. [2021-06-05 04:24:03,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:24:03,377 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 04:24:03,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:24:03,377 INFO L225 Difference]: With dead ends: 83 [2021-06-05 04:24:03,377 INFO L226 Difference]: Without dead ends: 83 [2021-06-05 04:24:03,377 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 102.6ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:24:03,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-06-05 04:24:03,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2021-06-05 04:24:03,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.150943396226415) internal successors, (114), 53 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:03,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 114 transitions. [2021-06-05 04:24:03,379 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 114 transitions. Word has length 13 [2021-06-05 04:24:03,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:24:03,379 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 114 transitions. [2021-06-05 04:24:03,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:03,379 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 114 transitions. [2021-06-05 04:24:03,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:24:03,379 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:24:03,380 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:24:03,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-05 04:24:03,602 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:24:03,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:24:03,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1961888568, now seen corresponding path program 25 times [2021-06-05 04:24:03,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:24:03,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284132455] [2021-06-05 04:24:03,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:24:03,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:03,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:03,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:24:03,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284132455] [2021-06-05 04:24:03,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284132455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:03,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112642371] [2021-06-05 04:24:03,679 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:03,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:03,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 04:24:03,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:24:03,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:24:03,914 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:03,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:24:03,918 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:03,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:24:03,929 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:03,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:03,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:03,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:24:03,935 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:03,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:03,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:03,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:03,961 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:03,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:24:03,965 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:04,016 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-05 04:24:04,016 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:24:04,018 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:24:04,018 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-05 04:24:04,056 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:04,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112642371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:04,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:24:04,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:24:04,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498622004] [2021-06-05 04:24:04,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:24:04,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:24:04,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:24:04,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:24:04,058 INFO L87 Difference]: Start difference. First operand 54 states and 114 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:04,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:24:04,309 INFO L93 Difference]: Finished difference Result 82 states and 162 transitions. [2021-06-05 04:24:04,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:24:04,309 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 04:24:04,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:24:04,310 INFO L225 Difference]: With dead ends: 82 [2021-06-05 04:24:04,310 INFO L226 Difference]: Without dead ends: 80 [2021-06-05 04:24:04,310 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 321.6ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:24:04,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-06-05 04:24:04,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 54. [2021-06-05 04:24:04,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:04,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 113 transitions. [2021-06-05 04:24:04,312 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 113 transitions. Word has length 13 [2021-06-05 04:24:04,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:24:04,312 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 113 transitions. [2021-06-05 04:24:04,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:04,312 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 113 transitions. [2021-06-05 04:24:04,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:24:04,312 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:24:04,312 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:24:04,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-06-05 04:24:04,517 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:24:04,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:24:04,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1405647622, now seen corresponding path program 26 times [2021-06-05 04:24:04,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:24:04,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135127904] [2021-06-05 04:24:04,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:24:04,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:04,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:04,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:24:04,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135127904] [2021-06-05 04:24:04,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135127904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:04,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941926928] [2021-06-05 04:24:04,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:04,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:24:04,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:24:04,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 04:24:04,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:24:04,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:04,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:04,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:04,701 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:04,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:04,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:04,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:04,707 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:04,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:04,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:04,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:24:04,711 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:04,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:04,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:24:04,715 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:04,756 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:24:04,757 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:24:04,758 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:24:04,758 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:24:04,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:04,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941926928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:04,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:24:04,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:24:04,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332730317] [2021-06-05 04:24:04,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:24:04,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:24:04,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:24:04,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:24:04,801 INFO L87 Difference]: Start difference. First operand 54 states and 113 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:05,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:24:05,085 INFO L93 Difference]: Finished difference Result 122 states and 227 transitions. [2021-06-05 04:24:05,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:24:05,085 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 04:24:05,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:24:05,085 INFO L225 Difference]: With dead ends: 122 [2021-06-05 04:24:05,085 INFO L226 Difference]: Without dead ends: 122 [2021-06-05 04:24:05,086 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 319.3ms TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:24:05,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-06-05 04:24:05,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 57. [2021-06-05 04:24:05,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.2142857142857144) internal successors, (124), 56 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:05,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 124 transitions. [2021-06-05 04:24:05,087 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 124 transitions. Word has length 13 [2021-06-05 04:24:05,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:24:05,087 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 124 transitions. [2021-06-05 04:24:05,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:05,087 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 124 transitions. [2021-06-05 04:24:05,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:24:05,088 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:24:05,088 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:24:05,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:05,293 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:24:05,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:24:05,293 INFO L82 PathProgramCache]: Analyzing trace with hash -604031394, now seen corresponding path program 27 times [2021-06-05 04:24:05,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:24:05,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689936097] [2021-06-05 04:24:05,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:24:05,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:05,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:05,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:24:05,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689936097] [2021-06-05 04:24:05,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689936097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:05,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709797706] [2021-06-05 04:24:05,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:05,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:24:05,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:24:05,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 04:24:05,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:24:05,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:05,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:05,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:05,475 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:05,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:05,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:05,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:05,480 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:05,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:05,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:05,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:24:05,484 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:05,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:05,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:24:05,489 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:05,525 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:24:05,526 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:24:05,526 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:24:05,526 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:24:05,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:05,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709797706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:05,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:24:05,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:24:05,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563923845] [2021-06-05 04:24:05,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:24:05,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:24:05,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:24:05,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:24:05,588 INFO L87 Difference]: Start difference. First operand 57 states and 124 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:06,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:24:06,164 INFO L93 Difference]: Finished difference Result 115 states and 215 transitions. [2021-06-05 04:24:06,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:24:06,164 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 04:24:06,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:24:06,165 INFO L225 Difference]: With dead ends: 115 [2021-06-05 04:24:06,165 INFO L226 Difference]: Without dead ends: 112 [2021-06-05 04:24:06,165 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 576.8ms TimeCoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:24:06,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-06-05 04:24:06,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 58. [2021-06-05 04:24:06,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.210526315789474) internal successors, (126), 57 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:06,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 126 transitions. [2021-06-05 04:24:06,167 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 126 transitions. Word has length 13 [2021-06-05 04:24:06,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:24:06,167 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 126 transitions. [2021-06-05 04:24:06,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:06,167 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 126 transitions. [2021-06-05 04:24:06,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:24:06,168 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:24:06,168 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:24:06,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:06,368 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:24:06,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:24:06,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1114312312, now seen corresponding path program 28 times [2021-06-05 04:24:06,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:24:06,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130602995] [2021-06-05 04:24:06,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:24:06,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:06,436 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:06,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:24:06,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130602995] [2021-06-05 04:24:06,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130602995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:06,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384085111] [2021-06-05 04:24:06,436 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:06,470 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:24:06,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:24:06,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 04:24:06,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:24:06,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:06,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:06,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:06,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:06,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:06,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:06,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:06,541 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:06,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:06,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:06,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:24:06,546 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:06,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:06,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:24:06,551 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:06,589 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:24:06,589 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:24:06,590 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:24:06,590 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:24:06,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:06,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384085111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:06,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:24:06,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:24:06,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192451515] [2021-06-05 04:24:06,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:24:06,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:24:06,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:24:06,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:24:06,642 INFO L87 Difference]: Start difference. First operand 58 states and 126 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:06,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:24:06,913 INFO L93 Difference]: Finished difference Result 105 states and 200 transitions. [2021-06-05 04:24:06,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:24:06,913 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 04:24:06,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:24:06,913 INFO L225 Difference]: With dead ends: 105 [2021-06-05 04:24:06,913 INFO L226 Difference]: Without dead ends: 105 [2021-06-05 04:24:06,914 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 310.3ms TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:24:06,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-06-05 04:24:06,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 56. [2021-06-05 04:24:06,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.1454545454545455) internal successors, (118), 55 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:06,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 118 transitions. [2021-06-05 04:24:06,915 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 118 transitions. Word has length 13 [2021-06-05 04:24:06,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:24:06,915 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 118 transitions. [2021-06-05 04:24:06,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:06,916 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 118 transitions. [2021-06-05 04:24:06,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:24:06,916 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:24:06,916 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:24:07,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable176 [2021-06-05 04:24:07,121 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:24:07,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:24:07,121 INFO L82 PathProgramCache]: Analyzing trace with hash 732792740, now seen corresponding path program 29 times [2021-06-05 04:24:07,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:24:07,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041285958] [2021-06-05 04:24:07,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:24:07,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:07,174 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:07,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:24:07,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041285958] [2021-06-05 04:24:07,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041285958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:07,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767567131] [2021-06-05 04:24:07,174 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:07,204 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:24:07,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:24:07,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 04:24:07,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:24:07,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:07,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:07,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:07,295 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:07,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:07,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:24:07,299 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:07,325 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:24:07,325 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:24:07,327 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:24:07,327 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:24:07,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:07,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767567131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:07,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:24:07,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:24:07,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563727009] [2021-06-05 04:24:07,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:24:07,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:24:07,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:24:07,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:24:07,347 INFO L87 Difference]: Start difference. First operand 56 states and 118 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:07,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:24:07,480 INFO L93 Difference]: Finished difference Result 91 states and 181 transitions. [2021-06-05 04:24:07,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:24:07,480 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 04:24:07,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:24:07,481 INFO L225 Difference]: With dead ends: 91 [2021-06-05 04:24:07,481 INFO L226 Difference]: Without dead ends: 91 [2021-06-05 04:24:07,481 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 98.7ms TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:24:07,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-06-05 04:24:07,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 60. [2021-06-05 04:24:07,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.23728813559322) internal successors, (132), 59 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:07,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 132 transitions. [2021-06-05 04:24:07,483 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 132 transitions. Word has length 13 [2021-06-05 04:24:07,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:24:07,483 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 132 transitions. [2021-06-05 04:24:07,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:07,483 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 132 transitions. [2021-06-05 04:24:07,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:24:07,483 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:24:07,483 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:24:07,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:07,684 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:24:07,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:24:07,684 INFO L82 PathProgramCache]: Analyzing trace with hash -186907968, now seen corresponding path program 30 times [2021-06-05 04:24:07,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:24:07,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251841074] [2021-06-05 04:24:07,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:24:07,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:07,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:07,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:24:07,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251841074] [2021-06-05 04:24:07,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251841074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:07,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945102802] [2021-06-05 04:24:07,735 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:07,777 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:24:07,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:24:07,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 04:24:07,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:24:07,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:24:07,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:07,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:24:07,911 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:07,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:24:07,915 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:07,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:07,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:07,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:24:07,921 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:07,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:07,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:07,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:07,926 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:07,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:24:07,931 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:07,968 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-05 04:24:07,968 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:24:07,969 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:24:07,970 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-05 04:24:07,998 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:07,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945102802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:07,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:24:07,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:24:07,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429927176] [2021-06-05 04:24:07,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:24:07,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:24:08,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:24:08,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:24:08,000 INFO L87 Difference]: Start difference. First operand 60 states and 132 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:08,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:24:08,272 INFO L93 Difference]: Finished difference Result 80 states and 161 transitions. [2021-06-05 04:24:08,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:24:08,273 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 04:24:08,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:24:08,273 INFO L225 Difference]: With dead ends: 80 [2021-06-05 04:24:08,273 INFO L226 Difference]: Without dead ends: 78 [2021-06-05 04:24:08,274 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 266.7ms TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:24:08,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-06-05 04:24:08,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 61. [2021-06-05 04:24:08,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.216666666666667) internal successors, (133), 60 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:08,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 133 transitions. [2021-06-05 04:24:08,276 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 133 transitions. Word has length 13 [2021-06-05 04:24:08,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:24:08,276 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 133 transitions. [2021-06-05 04:24:08,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:08,276 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 133 transitions. [2021-06-05 04:24:08,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:24:08,276 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:24:08,276 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:24:08,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2021-06-05 04:24:08,501 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:24:08,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:24:08,502 INFO L82 PathProgramCache]: Analyzing trace with hash 740523138, now seen corresponding path program 31 times [2021-06-05 04:24:08,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:24:08,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199240983] [2021-06-05 04:24:08,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:24:08,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:08,550 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:08,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:24:08,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199240983] [2021-06-05 04:24:08,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199240983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:08,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489333849] [2021-06-05 04:24:08,551 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:08,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:08,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 04:24:08,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:24:08,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:08,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:08,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:08,636 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:08,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:08,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:08,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:08,644 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:08,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:08,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:08,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:24:08,649 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:08,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:08,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:24:08,653 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:08,686 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:24:08,686 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:24:08,690 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:24:08,690 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:24:08,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:08,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489333849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:08,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:24:08,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:24:08,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271036255] [2021-06-05 04:24:08,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:24:08,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:24:08,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:24:08,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:24:08,735 INFO L87 Difference]: Start difference. First operand 61 states and 133 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:08,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:24:08,913 INFO L93 Difference]: Finished difference Result 105 states and 196 transitions. [2021-06-05 04:24:08,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:24:08,914 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 04:24:08,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:24:08,914 INFO L225 Difference]: With dead ends: 105 [2021-06-05 04:24:08,914 INFO L226 Difference]: Without dead ends: 105 [2021-06-05 04:24:08,915 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 209.8ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:24:08,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-06-05 04:24:08,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 59. [2021-06-05 04:24:08,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.206896551724138) internal successors, (128), 58 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:08,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 128 transitions. [2021-06-05 04:24:08,917 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 128 transitions. Word has length 13 [2021-06-05 04:24:08,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:24:08,917 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 128 transitions. [2021-06-05 04:24:08,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:08,917 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 128 transitions. [2021-06-05 04:24:08,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:24:08,917 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:24:08,917 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:24:09,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:09,133 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:24:09,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:24:09,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1542139366, now seen corresponding path program 32 times [2021-06-05 04:24:09,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:24:09,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535270815] [2021-06-05 04:24:09,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:24:09,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:09,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:09,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:24:09,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535270815] [2021-06-05 04:24:09,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535270815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:09,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454875125] [2021-06-05 04:24:09,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:09,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:24:09,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:24:09,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 04:24:09,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:24:09,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:09,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:09,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:09,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:09,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:09,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:09,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:09,286 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:09,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:09,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:09,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:24:09,291 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:09,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:09,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:24:09,295 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:09,334 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:24:09,334 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:24:09,335 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:24:09,335 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:24:09,402 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:09,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454875125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:09,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:24:09,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:24:09,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909217952] [2021-06-05 04:24:09,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:24:09,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:24:09,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:24:09,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:24:09,403 INFO L87 Difference]: Start difference. First operand 59 states and 128 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:09,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:24:09,682 INFO L93 Difference]: Finished difference Result 87 states and 167 transitions. [2021-06-05 04:24:09,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:24:09,682 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 04:24:09,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:24:09,683 INFO L225 Difference]: With dead ends: 87 [2021-06-05 04:24:09,683 INFO L226 Difference]: Without dead ends: 84 [2021-06-05 04:24:09,683 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 278.7ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:24:09,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-06-05 04:24:09,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 60. [2021-06-05 04:24:09,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.2033898305084745) internal successors, (130), 59 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:09,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 130 transitions. [2021-06-05 04:24:09,685 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 130 transitions. Word has length 13 [2021-06-05 04:24:09,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:24:09,685 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 130 transitions. [2021-06-05 04:24:09,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:09,686 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 130 transitions. [2021-06-05 04:24:09,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:24:09,686 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:24:09,686 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:24:09,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2021-06-05 04:24:09,886 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:24:09,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:24:09,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1034484224, now seen corresponding path program 33 times [2021-06-05 04:24:09,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:24:09,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711436178] [2021-06-05 04:24:09,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:24:09,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:09,941 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:09,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:24:09,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711436178] [2021-06-05 04:24:09,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711436178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:09,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306326737] [2021-06-05 04:24:09,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:09,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:24:09,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:24:09,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 04:24:09,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:24:10,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:10,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:10,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:10,018 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:10,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:10,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:10,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:10,023 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:10,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:10,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:10,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:24:10,028 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:10,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:10,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:24:10,032 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:10,072 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:24:10,072 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:24:10,073 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:24:10,073 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:24:10,119 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:10,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306326737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:10,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:24:10,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:24:10,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474653181] [2021-06-05 04:24:10,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:24:10,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:24:10,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:24:10,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:24:10,120 INFO L87 Difference]: Start difference. First operand 60 states and 130 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:10,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:24:10,253 INFO L93 Difference]: Finished difference Result 80 states and 161 transitions. [2021-06-05 04:24:10,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:24:10,253 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 04:24:10,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:24:10,254 INFO L225 Difference]: With dead ends: 80 [2021-06-05 04:24:10,254 INFO L226 Difference]: Without dead ends: 80 [2021-06-05 04:24:10,254 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 163.4ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:24:10,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-06-05 04:24:10,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 55. [2021-06-05 04:24:10,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 2.1296296296296298) internal successors, (115), 54 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:10,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 115 transitions. [2021-06-05 04:24:10,256 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 115 transitions. Word has length 13 [2021-06-05 04:24:10,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:24:10,256 INFO L482 AbstractCegarLoop]: Abstraction has 55 states and 115 transitions. [2021-06-05 04:24:10,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:10,256 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 115 transitions. [2021-06-05 04:24:10,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:24:10,256 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:24:10,256 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:24:10,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-06-05 04:24:10,469 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:24:10,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:24:10,469 INFO L82 PathProgramCache]: Analyzing trace with hash -748881858, now seen corresponding path program 34 times [2021-06-05 04:24:10,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:24:10,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880579713] [2021-06-05 04:24:10,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:24:10,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:10,525 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:10,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:24:10,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880579713] [2021-06-05 04:24:10,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880579713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:10,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529448544] [2021-06-05 04:24:10,525 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:10,554 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:24:10,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:24:10,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 04:24:10,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:24:10,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:10,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:10,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:10,605 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:10,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:10,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:10,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:10,609 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:10,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:10,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:10,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:24:10,613 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:10,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:10,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:24:10,618 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:10,650 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:24:10,650 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:24:10,651 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:24:10,651 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:24:10,702 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:10,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529448544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:10,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:24:10,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:24:10,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791787235] [2021-06-05 04:24:10,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:24:10,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:24:10,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:24:10,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:24:10,703 INFO L87 Difference]: Start difference. First operand 55 states and 115 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:10,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:24:10,844 INFO L93 Difference]: Finished difference Result 105 states and 196 transitions. [2021-06-05 04:24:10,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:24:10,845 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 04:24:10,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:24:10,845 INFO L225 Difference]: With dead ends: 105 [2021-06-05 04:24:10,845 INFO L226 Difference]: Without dead ends: 105 [2021-06-05 04:24:10,845 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 177.7ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:24:10,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-06-05 04:24:10,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 57. [2021-06-05 04:24:10,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.1964285714285716) internal successors, (123), 56 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:10,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 123 transitions. [2021-06-05 04:24:10,847 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 123 transitions. Word has length 13 [2021-06-05 04:24:10,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:24:10,847 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 123 transitions. [2021-06-05 04:24:10,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:10,848 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 123 transitions. [2021-06-05 04:24:10,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:24:10,848 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:24:10,848 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:24:11,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:11,061 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:24:11,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:24:11,061 INFO L82 PathProgramCache]: Analyzing trace with hash 52734370, now seen corresponding path program 35 times [2021-06-05 04:24:11,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:24:11,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742506890] [2021-06-05 04:24:11,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:24:11,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:11,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:11,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:24:11,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742506890] [2021-06-05 04:24:11,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742506890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:11,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772739389] [2021-06-05 04:24:11,120 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:11,146 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:24:11,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:24:11,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 04:24:11,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:24:11,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:11,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:11,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:11,218 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:11,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:11,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:11,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:11,223 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:11,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:11,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:11,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:24:11,227 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:11,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:11,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:24:11,233 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:11,273 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:24:11,273 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:24:11,274 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:24:11,274 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:24:11,343 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:11,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772739389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:11,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:24:11,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:24:11,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226809450] [2021-06-05 04:24:11,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:24:11,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:24:11,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:24:11,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:24:11,345 INFO L87 Difference]: Start difference. First operand 57 states and 123 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:11,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:24:11,613 INFO L93 Difference]: Finished difference Result 93 states and 173 transitions. [2021-06-05 04:24:11,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:24:11,613 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 04:24:11,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:24:11,614 INFO L225 Difference]: With dead ends: 93 [2021-06-05 04:24:11,614 INFO L226 Difference]: Without dead ends: 88 [2021-06-05 04:24:11,614 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 328.0ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:24:11,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-06-05 04:24:11,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 58. [2021-06-05 04:24:11,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.175438596491228) internal successors, (124), 57 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:11,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 124 transitions. [2021-06-05 04:24:11,616 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 124 transitions. Word has length 13 [2021-06-05 04:24:11,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:24:11,616 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 124 transitions. [2021-06-05 04:24:11,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:11,616 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 124 transitions. [2021-06-05 04:24:11,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:24:11,616 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:24:11,616 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:24:11,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:11,825 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:24:11,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:24:11,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1771078076, now seen corresponding path program 36 times [2021-06-05 04:24:11,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:24:11,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078272226] [2021-06-05 04:24:11,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:24:11,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:11,888 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:11,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:24:11,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078272226] [2021-06-05 04:24:11,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078272226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:11,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044866492] [2021-06-05 04:24:11,889 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:11,924 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:24:11,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:24:11,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 04:24:11,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:24:11,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:11,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:11,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:11,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:11,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:11,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:11,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:11,985 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:11,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:11,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:11,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:24:11,989 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:11,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:11,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:24:11,994 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:12,031 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:24:12,032 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:24:12,032 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:24:12,033 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:24:12,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:12,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044866492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:12,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:24:12,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:24:12,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922640593] [2021-06-05 04:24:12,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:24:12,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:24:12,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:24:12,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:24:12,083 INFO L87 Difference]: Start difference. First operand 58 states and 124 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:12,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:24:12,285 INFO L93 Difference]: Finished difference Result 82 states and 162 transitions. [2021-06-05 04:24:12,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:24:12,297 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 04:24:12,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:24:12,297 INFO L225 Difference]: With dead ends: 82 [2021-06-05 04:24:12,297 INFO L226 Difference]: Without dead ends: 82 [2021-06-05 04:24:12,298 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 240.4ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:24:12,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-06-05 04:24:12,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 57. [2021-06-05 04:24:12,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.125) internal successors, (119), 56 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:12,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 119 transitions. [2021-06-05 04:24:12,299 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 119 transitions. Word has length 13 [2021-06-05 04:24:12,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:24:12,300 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 119 transitions. [2021-06-05 04:24:12,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:12,300 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 119 transitions. [2021-06-05 04:24:12,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:24:12,300 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:24:12,300 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:24:12,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:12,509 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:24:12,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:24:12,509 INFO L82 PathProgramCache]: Analyzing trace with hash 60464768, now seen corresponding path program 37 times [2021-06-05 04:24:12,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:24:12,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342253898] [2021-06-05 04:24:12,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:24:12,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:12,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:12,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:24:12,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342253898] [2021-06-05 04:24:12,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342253898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:12,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414659754] [2021-06-05 04:24:12,564 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:12,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:12,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 04:24:12,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:24:12,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:12,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:12,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:24:12,675 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:12,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:12,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:12,678 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:12,698 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-06-05 04:24:12,699 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:24:12,699 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:24:12,699 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-06-05 04:24:12,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:12,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414659754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:12,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:24:12,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:24:12,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931959951] [2021-06-05 04:24:12,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:24:12,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:24:12,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:24:12,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:24:12,722 INFO L87 Difference]: Start difference. First operand 57 states and 119 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:12,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:24:12,800 INFO L93 Difference]: Finished difference Result 82 states and 162 transitions. [2021-06-05 04:24:12,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:24:12,801 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 04:24:12,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:24:12,802 INFO L225 Difference]: With dead ends: 82 [2021-06-05 04:24:12,802 INFO L226 Difference]: Without dead ends: 82 [2021-06-05 04:24:12,803 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 100.7ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:24:12,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-06-05 04:24:12,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2021-06-05 04:24:12,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.0784313725490198) internal successors, (106), 51 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:12,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 106 transitions. [2021-06-05 04:24:12,804 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 106 transitions. Word has length 13 [2021-06-05 04:24:12,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:24:12,804 INFO L482 AbstractCegarLoop]: Abstraction has 52 states and 106 transitions. [2021-06-05 04:24:12,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:12,805 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 106 transitions. [2021-06-05 04:24:12,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:24:12,805 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:24:12,805 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:24:13,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:13,021 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:24:13,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:24:13,021 INFO L82 PathProgramCache]: Analyzing trace with hash -127183706, now seen corresponding path program 38 times [2021-06-05 04:24:13,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:24:13,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604365374] [2021-06-05 04:24:13,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:24:13,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:13,540 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:13,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:24:13,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604365374] [2021-06-05 04:24:13,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604365374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:13,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738678883] [2021-06-05 04:24:13,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:13,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:24:13,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:24:13,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 04:24:13,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:24:13,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:24:13,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:13,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 04:24:13,974 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:13,993 INFO L628 ElimStorePlain]: treesize reduction 111, result has 9.0 percent of original size [2021-06-05 04:24:13,993 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:24:13,993 INFO L518 ElimStorePlain]: Eliminatee v_prenex_23 vanished before elimination [2021-06-05 04:24:13,994 INFO L518 ElimStorePlain]: Eliminatee v_prenex_22 vanished before elimination [2021-06-05 04:24:13,994 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:24:13,994 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:140, output treesize:11 [2021-06-05 04:24:14,022 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:14,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738678883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:14,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:24:14,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-06-05 04:24:14,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346572138] [2021-06-05 04:24:14,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:24:14,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:24:14,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:24:14,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:24:14,024 INFO L87 Difference]: Start difference. First operand 52 states and 106 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:14,369 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-06-05 04:24:15,067 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2021-06-05 04:24:15,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:24:15,099 INFO L93 Difference]: Finished difference Result 111 states and 206 transitions. [2021-06-05 04:24:15,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:24:15,100 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 04:24:15,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:24:15,100 INFO L225 Difference]: With dead ends: 111 [2021-06-05 04:24:15,101 INFO L226 Difference]: Without dead ends: 108 [2021-06-05 04:24:15,101 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 1499.7ms TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:24:15,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-06-05 04:24:15,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 62. [2021-06-05 04:24:15,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.1147540983606556) internal successors, (129), 61 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:15,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 129 transitions. [2021-06-05 04:24:15,103 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 129 transitions. Word has length 14 [2021-06-05 04:24:15,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:24:15,103 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 129 transitions. [2021-06-05 04:24:15,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:15,103 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 129 transitions. [2021-06-05 04:24:15,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:24:15,103 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:24:15,103 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:24:15,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:15,309 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:24:15,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:24:15,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1602893270, now seen corresponding path program 39 times [2021-06-05 04:24:15,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:24:15,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088586712] [2021-06-05 04:24:15,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:24:15,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:15,603 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:15,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:24:15,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088586712] [2021-06-05 04:24:15,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088586712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:15,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006075712] [2021-06-05 04:24:15,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:15,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:24:15,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:24:15,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 04:24:15,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:24:16,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:24:16,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:16,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:16,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-06-05 04:24:16,018 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:16,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:24:16,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:16,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:16,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 32 [2021-06-05 04:24:16,026 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:16,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:24:16,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:16,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:16,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-06-05 04:24:16,034 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:16,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:24:16,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:16,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 04:24:16,039 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:16,056 INFO L628 ElimStorePlain]: treesize reduction 83, result has 15.3 percent of original size [2021-06-05 04:24:16,056 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:24:16,057 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:24:16,057 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:161, output treesize:11 [2021-06-05 04:24:16,065 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:16,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006075712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:16,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:24:16,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 04:24:16,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517792718] [2021-06-05 04:24:16,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:24:16,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:24:16,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:24:16,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:24:16,066 INFO L87 Difference]: Start difference. First operand 62 states and 129 transitions. Second operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:16,456 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2021-06-05 04:24:16,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:24:16,879 INFO L93 Difference]: Finished difference Result 118 states and 238 transitions. [2021-06-05 04:24:16,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:24:16,881 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 04:24:16,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:24:16,882 INFO L225 Difference]: With dead ends: 118 [2021-06-05 04:24:16,882 INFO L226 Difference]: Without dead ends: 110 [2021-06-05 04:24:16,882 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1072.7ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:24:16,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-06-05 04:24:16,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 79. [2021-06-05 04:24:16,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.282051282051282) internal successors, (178), 78 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:16,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 178 transitions. [2021-06-05 04:24:16,884 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 178 transitions. Word has length 14 [2021-06-05 04:24:16,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:24:16,884 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 178 transitions. [2021-06-05 04:24:16,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:16,884 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 178 transitions. [2021-06-05 04:24:16,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:24:16,884 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:24:16,884 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:24:17,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-06-05 04:24:17,085 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:24:17,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:24:17,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1595162872, now seen corresponding path program 40 times [2021-06-05 04:24:17,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:24:17,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023568280] [2021-06-05 04:24:17,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:24:17,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:17,261 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:17,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:24:17,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023568280] [2021-06-05 04:24:17,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023568280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:17,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032297865] [2021-06-05 04:24:17,262 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:17,298 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:24:17,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:24:17,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 04:24:17,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:24:17,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:24:17,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:24:17,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:17,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:17,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 04:24:17,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:17,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:24:17,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:24:17,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:17,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 04:24:17,713 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:17,727 INFO L628 ElimStorePlain]: treesize reduction 90, result has 10.9 percent of original size [2021-06-05 04:24:17,727 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:24:17,727 INFO L518 ElimStorePlain]: Eliminatee v_prenex_25 vanished before elimination [2021-06-05 04:24:17,728 INFO L518 ElimStorePlain]: Eliminatee v_prenex_26 vanished before elimination [2021-06-05 04:24:17,728 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:24:17,728 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:140, output treesize:11 [2021-06-05 04:24:17,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:17,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032297865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:17,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:24:17,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 04:24:17,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927478812] [2021-06-05 04:24:17,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:24:17,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:24:17,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:24:17,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:24:17,741 INFO L87 Difference]: Start difference. First operand 79 states and 178 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:18,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:24:18,222 INFO L93 Difference]: Finished difference Result 108 states and 232 transitions. [2021-06-05 04:24:18,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:24:18,223 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 04:24:18,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:24:18,223 INFO L225 Difference]: With dead ends: 108 [2021-06-05 04:24:18,223 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 04:24:18,223 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 747.5ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:24:18,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 04:24:18,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 86. [2021-06-05 04:24:18,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.3294117647058825) internal successors, (198), 85 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:18,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 198 transitions. [2021-06-05 04:24:18,225 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 198 transitions. Word has length 14 [2021-06-05 04:24:18,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:24:18,225 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 198 transitions. [2021-06-05 04:24:18,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:18,226 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 198 transitions. [2021-06-05 04:24:18,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:24:18,226 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:24:18,226 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:24:18,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2021-06-05 04:24:18,441 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:24:18,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:24:18,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1210399428, now seen corresponding path program 41 times [2021-06-05 04:24:18,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:24:18,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382601547] [2021-06-05 04:24:18,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:24:18,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:18,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:18,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:24:18,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382601547] [2021-06-05 04:24:18,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382601547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:18,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895418721] [2021-06-05 04:24:18,615 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:18,661 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:24:18,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:24:18,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 04:24:18,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:24:18,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:24:18,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:18,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:18,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 04:24:18,968 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:18,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:24:18,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:18,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 04:24:18,974 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:18,987 INFO L628 ElimStorePlain]: treesize reduction 88, result has 11.1 percent of original size [2021-06-05 04:24:18,988 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:24:18,988 INFO L518 ElimStorePlain]: Eliminatee v_prenex_31 vanished before elimination [2021-06-05 04:24:18,988 INFO L518 ElimStorePlain]: Eliminatee v_prenex_30 vanished before elimination [2021-06-05 04:24:18,988 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:24:18,988 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:140, output treesize:11 [2021-06-05 04:24:19,000 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:19,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895418721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:19,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:24:19,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 04:24:19,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545690074] [2021-06-05 04:24:19,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:24:19,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:24:19,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:24:19,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:24:19,001 INFO L87 Difference]: Start difference. First operand 86 states and 198 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:19,314 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-06-05 04:24:19,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:24:19,489 INFO L93 Difference]: Finished difference Result 104 states and 232 transitions. [2021-06-05 04:24:19,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:24:19,489 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 04:24:19,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:24:19,490 INFO L225 Difference]: With dead ends: 104 [2021-06-05 04:24:19,490 INFO L226 Difference]: Without dead ends: 101 [2021-06-05 04:24:19,490 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 622.5ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:24:19,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-06-05 04:24:19,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 86. [2021-06-05 04:24:19,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.3294117647058825) internal successors, (198), 85 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:19,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 198 transitions. [2021-06-05 04:24:19,492 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 198 transitions. Word has length 14 [2021-06-05 04:24:19,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:24:19,492 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 198 transitions. [2021-06-05 04:24:19,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:19,493 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 198 transitions. [2021-06-05 04:24:19,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:24:19,493 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:24:19,493 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:24:19,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:19,694 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:24:19,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:24:19,694 INFO L82 PathProgramCache]: Analyzing trace with hash -221091546, now seen corresponding path program 42 times [2021-06-05 04:24:19,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:24:19,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907753842] [2021-06-05 04:24:19,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:24:19,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:19,884 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:19,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:24:19,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907753842] [2021-06-05 04:24:19,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907753842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:19,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268658497] [2021-06-05 04:24:19,885 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:19,909 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:24:19,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:24:19,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 04:24:19,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:24:20,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:24:20,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:20,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:20,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-06-05 04:24:20,136 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:20,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:24:20,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:20,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:20,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-06-05 04:24:20,143 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:20,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:24:20,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:20,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-06-05 04:24:20,147 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:20,160 INFO L628 ElimStorePlain]: treesize reduction 76, result has 12.6 percent of original size [2021-06-05 04:24:20,160 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:24:20,161 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:24:20,161 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:128, output treesize:11 [2021-06-05 04:24:20,198 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:20,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268658497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:20,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:24:20,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-06-05 04:24:20,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265316043] [2021-06-05 04:24:20,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:24:20,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:24:20,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:24:20,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:24:20,205 INFO L87 Difference]: Start difference. First operand 86 states and 198 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:20,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:24:20,470 INFO L93 Difference]: Finished difference Result 99 states and 223 transitions. [2021-06-05 04:24:20,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:24:20,471 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 04:24:20,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:24:20,471 INFO L225 Difference]: With dead ends: 99 [2021-06-05 04:24:20,471 INFO L226 Difference]: Without dead ends: 96 [2021-06-05 04:24:20,472 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 468.9ms TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:24:20,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-06-05 04:24:20,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 88. [2021-06-05 04:24:20,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.32183908045977) internal successors, (202), 87 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:20,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 202 transitions. [2021-06-05 04:24:20,474 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 202 transitions. Word has length 14 [2021-06-05 04:24:20,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:24:20,474 INFO L482 AbstractCegarLoop]: Abstraction has 88 states and 202 transitions. [2021-06-05 04:24:20,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:20,474 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 202 transitions. [2021-06-05 04:24:20,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:24:20,474 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:24:20,474 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:24:20,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable286 [2021-06-05 04:24:20,689 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:24:20,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:24:20,689 INFO L82 PathProgramCache]: Analyzing trace with hash 26281190, now seen corresponding path program 43 times [2021-06-05 04:24:20,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:24:20,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406011085] [2021-06-05 04:24:20,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:24:20,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:20,846 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:20,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:24:20,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406011085] [2021-06-05 04:24:20,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406011085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:20,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843050369] [2021-06-05 04:24:20,846 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:20,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:20,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 04:24:20,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:24:21,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:24:21,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:24:21,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:21,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 04:24:21,200 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:21,219 INFO L628 ElimStorePlain]: treesize reduction 107, result has 9.3 percent of original size [2021-06-05 04:24:21,219 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:24:21,220 INFO L518 ElimStorePlain]: Eliminatee v_prenex_34 vanished before elimination [2021-06-05 04:24:21,220 INFO L518 ElimStorePlain]: Eliminatee v_prenex_33 vanished before elimination [2021-06-05 04:24:21,220 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:24:21,220 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:140, output treesize:11 [2021-06-05 04:24:21,232 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:21,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843050369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:21,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:24:21,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 04:24:21,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327440092] [2021-06-05 04:24:21,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:24:21,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:24:21,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:24:21,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:24:21,233 INFO L87 Difference]: Start difference. First operand 88 states and 202 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:21,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:24:21,488 INFO L93 Difference]: Finished difference Result 145 states and 308 transitions. [2021-06-05 04:24:21,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:24:21,489 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 04:24:21,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:24:21,489 INFO L225 Difference]: With dead ends: 145 [2021-06-05 04:24:21,489 INFO L226 Difference]: Without dead ends: 142 [2021-06-05 04:24:21,489 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 438.9ms TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:24:21,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-06-05 04:24:21,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 99. [2021-06-05 04:24:21,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.4693877551020407) internal successors, (242), 98 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:21,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 242 transitions. [2021-06-05 04:24:21,491 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 242 transitions. Word has length 14 [2021-06-05 04:24:21,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:24:21,491 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 242 transitions. [2021-06-05 04:24:21,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:21,492 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 242 transitions. [2021-06-05 04:24:21,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:24:21,492 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:24:21,492 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:24:21,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable305,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:21,697 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:24:21,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:24:21,697 INFO L82 PathProgramCache]: Analyzing trace with hash -390038426, now seen corresponding path program 44 times [2021-06-05 04:24:21,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:24:21,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105737637] [2021-06-05 04:24:21,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:24:21,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:21,863 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:21,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:24:21,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105737637] [2021-06-05 04:24:21,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105737637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:21,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056625682] [2021-06-05 04:24:21,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:21,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:24:21,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:24:21,889 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 04:24:21,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:24:22,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:24:22,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:24:22,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:22,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:22,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-06-05 04:24:22,107 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:22,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:24:22,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:24:22,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:22,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:22,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 04:24:22,116 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:22,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:24:22,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:24:22,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:22,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:22,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2021-06-05 04:24:22,125 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:22,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:24:22,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:24:22,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:22,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 04:24:22,132 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:22,196 INFO L628 ElimStorePlain]: treesize reduction 99, result has 40.4 percent of original size [2021-06-05 04:24:22,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:22,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:24:22,200 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:24:22,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:24:22,224 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:24:22,225 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:245, output treesize:62 [2021-06-05 04:24:22,291 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:22,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056625682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:22,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:24:22,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 04:24:22,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985712329] [2021-06-05 04:24:22,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:24:22,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:24:22,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:24:22,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:24:22,292 INFO L87 Difference]: Start difference. First operand 99 states and 242 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:22,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:24:22,557 INFO L93 Difference]: Finished difference Result 161 states and 353 transitions. [2021-06-05 04:24:22,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:24:22,557 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 04:24:22,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:24:22,558 INFO L225 Difference]: With dead ends: 161 [2021-06-05 04:24:22,558 INFO L226 Difference]: Without dead ends: 155 [2021-06-05 04:24:22,558 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 454.3ms TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:24:22,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-06-05 04:24:22,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 112. [2021-06-05 04:24:22,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.5315315315315314) internal successors, (281), 111 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:22,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 281 transitions. [2021-06-05 04:24:22,561 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 281 transitions. Word has length 14 [2021-06-05 04:24:22,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:24:22,561 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 281 transitions. [2021-06-05 04:24:22,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:22,562 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 281 transitions. [2021-06-05 04:24:22,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:24:22,562 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:24:22,562 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:24:22,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable320 [2021-06-05 04:24:22,777 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:24:22,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:24:22,777 INFO L82 PathProgramCache]: Analyzing trace with hash 732601002, now seen corresponding path program 45 times [2021-06-05 04:24:22,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:24:22,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995702663] [2021-06-05 04:24:22,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:24:22,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:23,286 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:23,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:24:23,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995702663] [2021-06-05 04:24:23,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995702663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:23,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312265151] [2021-06-05 04:24:23,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:23,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:24:23,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:24:23,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 04:24:23,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:24:23,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:24:23,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:24:23,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:23,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:23,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 04:24:23,637 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:23,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:24:23,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:24:23,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:23,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 04:24:23,644 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:23,679 INFO L628 ElimStorePlain]: treesize reduction 69, result has 50.0 percent of original size [2021-06-05 04:24:23,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:23,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 04:24:23,683 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:23,696 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:24:23,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:24:23,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-05 04:24:23,700 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:23,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:24:23,712 INFO L518 ElimStorePlain]: Eliminatee v_prenex_39 vanished before elimination [2021-06-05 04:24:23,713 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:24:23,713 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:177, output treesize:22 [2021-06-05 04:24:23,744 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:23,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312265151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:23,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:24:23,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 04:24:23,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149190276] [2021-06-05 04:24:23,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:24:23,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:24:23,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:24:23,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:24:23,746 INFO L87 Difference]: Start difference. First operand 112 states and 281 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:24,091 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 52 [2021-06-05 04:24:24,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:24:24,452 INFO L93 Difference]: Finished difference Result 178 states and 428 transitions. [2021-06-05 04:24:24,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:24:24,452 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 04:24:24,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:24:24,453 INFO L225 Difference]: With dead ends: 178 [2021-06-05 04:24:24,453 INFO L226 Difference]: Without dead ends: 175 [2021-06-05 04:24:24,453 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1093.2ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:24:24,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-06-05 04:24:24,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 114. [2021-06-05 04:24:24,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.52212389380531) internal successors, (285), 113 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:24,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 285 transitions. [2021-06-05 04:24:24,455 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 285 transitions. Word has length 14 [2021-06-05 04:24:24,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:24:24,455 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 285 transitions. [2021-06-05 04:24:24,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:24,455 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 285 transitions. [2021-06-05 04:24:24,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:24:24,456 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:24:24,456 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:24:24,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:24,656 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:24:24,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:24:24,657 INFO L82 PathProgramCache]: Analyzing trace with hash -844740728, now seen corresponding path program 46 times [2021-06-05 04:24:24,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:24:24,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331095965] [2021-06-05 04:24:24,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:24:24,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:24,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:24,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:24:24,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331095965] [2021-06-05 04:24:24,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331095965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:24,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524942043] [2021-06-05 04:24:24,798 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:24,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:24:24,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:24:24,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 04:24:24,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:24:25,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:24:25,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:24:25,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:25,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 04:24:25,120 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:25,139 INFO L628 ElimStorePlain]: treesize reduction 107, result has 9.3 percent of original size [2021-06-05 04:24:25,139 INFO L518 ElimStorePlain]: Eliminatee v_prenex_43 vanished before elimination [2021-06-05 04:24:25,139 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:24:25,139 INFO L518 ElimStorePlain]: Eliminatee v_prenex_44 vanished before elimination [2021-06-05 04:24:25,140 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:24:25,140 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:140, output treesize:11 [2021-06-05 04:24:25,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:25,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524942043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:25,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:24:25,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-06-05 04:24:25,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374977882] [2021-06-05 04:24:25,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:24:25,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:24:25,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:24:25,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:24:25,166 INFO L87 Difference]: Start difference. First operand 114 states and 285 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:25,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:24:25,524 INFO L93 Difference]: Finished difference Result 140 states and 336 transitions. [2021-06-05 04:24:25,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:24:25,525 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 04:24:25,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:24:25,525 INFO L225 Difference]: With dead ends: 140 [2021-06-05 04:24:25,525 INFO L226 Difference]: Without dead ends: 137 [2021-06-05 04:24:25,525 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 498.4ms TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:24:25,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-06-05 04:24:25,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 114. [2021-06-05 04:24:25,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.52212389380531) internal successors, (285), 113 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:25,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 285 transitions. [2021-06-05 04:24:25,530 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 285 transitions. Word has length 14 [2021-06-05 04:24:25,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:24:25,531 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 285 transitions. [2021-06-05 04:24:25,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:25,531 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 285 transitions. [2021-06-05 04:24:25,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:24:25,531 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:24:25,531 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:24:25,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:25,746 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:24:25,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:24:25,746 INFO L82 PathProgramCache]: Analyzing trace with hash -605098390, now seen corresponding path program 47 times [2021-06-05 04:24:25,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:24:25,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621832804] [2021-06-05 04:24:25,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:24:25,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:25,927 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:25,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:24:25,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621832804] [2021-06-05 04:24:25,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621832804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:25,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140353890] [2021-06-05 04:24:25,927 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:25,953 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:24:25,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:24:25,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 04:24:25,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:24:26,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:24:26,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:24:26,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:26,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 04:24:26,311 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:26,328 INFO L628 ElimStorePlain]: treesize reduction 107, result has 9.3 percent of original size [2021-06-05 04:24:26,328 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:24:26,328 INFO L518 ElimStorePlain]: Eliminatee v_prenex_47 vanished before elimination [2021-06-05 04:24:26,328 INFO L518 ElimStorePlain]: Eliminatee v_prenex_46 vanished before elimination [2021-06-05 04:24:26,328 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:24:26,329 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:140, output treesize:11 [2021-06-05 04:24:26,337 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:26,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140353890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:26,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:24:26,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 04:24:26,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236782401] [2021-06-05 04:24:26,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:24:26,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:24:26,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:24:26,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:24:26,338 INFO L87 Difference]: Start difference. First operand 114 states and 285 transitions. Second operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:26,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:24:26,768 INFO L93 Difference]: Finished difference Result 149 states and 349 transitions. [2021-06-05 04:24:26,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:24:26,769 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 04:24:26,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:24:26,769 INFO L225 Difference]: With dead ends: 149 [2021-06-05 04:24:26,769 INFO L226 Difference]: Without dead ends: 144 [2021-06-05 04:24:26,769 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 714.4ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:24:26,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-06-05 04:24:26,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 116. [2021-06-05 04:24:26,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.5478260869565217) internal successors, (293), 115 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:26,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 293 transitions. [2021-06-05 04:24:26,774 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 293 transitions. Word has length 14 [2021-06-05 04:24:26,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:24:26,774 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 293 transitions. [2021-06-05 04:24:26,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:26,775 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 293 transitions. [2021-06-05 04:24:26,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:24:26,775 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:24:26,775 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:24:26,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable353 [2021-06-05 04:24:26,990 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:24:26,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:24:26,990 INFO L82 PathProgramCache]: Analyzing trace with hash -597367992, now seen corresponding path program 48 times [2021-06-05 04:24:26,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:24:26,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594612421] [2021-06-05 04:24:26,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:24:26,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:27,149 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:27,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:24:27,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594612421] [2021-06-05 04:24:27,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594612421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:27,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007779742] [2021-06-05 04:24:27,150 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:27,181 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:24:27,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:24:27,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 04:24:27,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:24:27,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:24:27,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:27,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:27,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-06-05 04:24:27,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:27,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:24:27,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:27,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:27,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-06-05 04:24:27,554 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:27,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:24:27,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:27,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-06-05 04:24:27,559 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:27,573 INFO L628 ElimStorePlain]: treesize reduction 70, result has 13.6 percent of original size [2021-06-05 04:24:27,573 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:24:27,574 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:24:27,574 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:128, output treesize:11 [2021-06-05 04:24:27,598 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:27,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007779742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:27,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:24:27,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 04:24:27,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073885052] [2021-06-05 04:24:27,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:24:27,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:24:27,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:24:27,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:24:27,599 INFO L87 Difference]: Start difference. First operand 116 states and 293 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:28,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:24:28,144 INFO L93 Difference]: Finished difference Result 179 states and 405 transitions. [2021-06-05 04:24:28,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:24:28,145 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 04:24:28,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:24:28,146 INFO L225 Difference]: With dead ends: 179 [2021-06-05 04:24:28,146 INFO L226 Difference]: Without dead ends: 175 [2021-06-05 04:24:28,146 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 746.9ms TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:24:28,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-06-05 04:24:28,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 115. [2021-06-05 04:24:28,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.5526315789473686) internal successors, (291), 114 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:28,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 291 transitions. [2021-06-05 04:24:28,149 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 291 transitions. Word has length 14 [2021-06-05 04:24:28,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:24:28,149 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 291 transitions. [2021-06-05 04:24:28,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:28,149 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 291 transitions. [2021-06-05 04:24:28,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:24:28,149 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:24:28,149 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:24:28,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable367 [2021-06-05 04:24:28,357 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:24:28,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:24:28,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1262043392, now seen corresponding path program 49 times [2021-06-05 04:24:28,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:24:28,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537005403] [2021-06-05 04:24:28,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:24:28,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:28,588 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:28,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:24:28,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537005403] [2021-06-05 04:24:28,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537005403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:28,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069112931] [2021-06-05 04:24:28,589 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:28,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:28,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 04:24:28,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:24:28,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:24:28,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:24:28,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:28,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:28,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 04:24:28,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:28,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:24:28,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:24:28,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:28,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 04:24:28,931 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:28,943 INFO L628 ElimStorePlain]: treesize reduction 90, result has 10.9 percent of original size [2021-06-05 04:24:28,943 INFO L518 ElimStorePlain]: Eliminatee v_prenex_54 vanished before elimination [2021-06-05 04:24:28,943 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:24:28,943 INFO L518 ElimStorePlain]: Eliminatee v_prenex_53 vanished before elimination [2021-06-05 04:24:28,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:24:28,944 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:140, output treesize:11 [2021-06-05 04:24:28,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:28,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069112931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:28,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:24:28,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-06-05 04:24:28,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404801779] [2021-06-05 04:24:28,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:24:28,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:24:28,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:24:28,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:24:28,966 INFO L87 Difference]: Start difference. First operand 115 states and 291 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:29,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:24:29,251 INFO L93 Difference]: Finished difference Result 131 states and 321 transitions. [2021-06-05 04:24:29,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:24:29,251 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 04:24:29,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:24:29,252 INFO L225 Difference]: With dead ends: 131 [2021-06-05 04:24:29,252 INFO L226 Difference]: Without dead ends: 128 [2021-06-05 04:24:29,252 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 545.9ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:24:29,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-06-05 04:24:29,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 115. [2021-06-05 04:24:29,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.5526315789473686) internal successors, (291), 114 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:29,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 291 transitions. [2021-06-05 04:24:29,255 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 291 transitions. Word has length 14 [2021-06-05 04:24:29,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:24:29,255 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 291 transitions. [2021-06-05 04:24:29,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:29,255 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 291 transitions. [2021-06-05 04:24:29,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:24:29,255 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:24:29,255 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:24:29,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable386 [2021-06-05 04:24:29,477 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:24:29,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:24:29,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1720196186, now seen corresponding path program 50 times [2021-06-05 04:24:29,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:24:29,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715780456] [2021-06-05 04:24:29,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:24:29,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:29,755 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-06-05 04:24:29,849 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:29,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:24:29,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715780456] [2021-06-05 04:24:29,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715780456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:29,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026950206] [2021-06-05 04:24:29,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:29,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:24:29,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:24:29,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 04:24:29,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:24:30,060 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-06-05 04:24:30,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:24:30,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:24:30,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:30,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:30,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2021-06-05 04:24:30,253 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:30,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:24:30,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:24:30,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:30,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 04:24:30,265 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:30,309 INFO L628 ElimStorePlain]: treesize reduction 69, result has 46.5 percent of original size [2021-06-05 04:24:30,310 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:24:30,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:24:30,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:30,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 04:24:30,315 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:30,328 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:24:30,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:30,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:24:30,333 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:24:30,346 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:24:30,348 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:24:30,348 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:169, output treesize:22 [2021-06-05 04:24:30,388 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:30,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026950206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:30,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:24:30,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-05 04:24:30,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840564593] [2021-06-05 04:24:30,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:24:30,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:24:30,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:24:30,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:24:30,390 INFO L87 Difference]: Start difference. First operand 115 states and 291 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:31,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:24:31,028 INFO L93 Difference]: Finished difference Result 144 states and 342 transitions. [2021-06-05 04:24:31,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:24:31,028 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 04:24:31,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:24:31,029 INFO L225 Difference]: With dead ends: 144 [2021-06-05 04:24:31,029 INFO L226 Difference]: Without dead ends: 141 [2021-06-05 04:24:31,029 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1094.4ms TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:24:31,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-06-05 04:24:31,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 118. [2021-06-05 04:24:31,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.5641025641025643) internal successors, (300), 117 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:31,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 300 transitions. [2021-06-05 04:24:31,032 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 300 transitions. Word has length 14 [2021-06-05 04:24:31,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:24:31,032 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 300 transitions. [2021-06-05 04:24:31,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:31,032 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 300 transitions. [2021-06-05 04:24:31,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:24:31,033 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:24:31,033 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:24:31,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable399 [2021-06-05 04:24:31,252 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:24:31,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:24:31,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1093096512, now seen corresponding path program 51 times [2021-06-05 04:24:31,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:24:31,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252765642] [2021-06-05 04:24:31,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:24:31,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:31,409 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:31,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:24:31,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252765642] [2021-06-05 04:24:31,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252765642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:31,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080007172] [2021-06-05 04:24:31,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:31,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:24:31,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:24:31,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 04:24:31,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:24:31,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:24:31,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:31,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:31,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-06-05 04:24:31,654 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:31,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:24:31,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:31,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:31,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-06-05 04:24:31,660 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:31,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:24:31,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:31,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-06-05 04:24:31,664 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:31,676 INFO L628 ElimStorePlain]: treesize reduction 66, result has 14.3 percent of original size [2021-06-05 04:24:31,676 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:24:31,677 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:24:31,677 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:128, output treesize:11 [2021-06-05 04:24:31,686 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:31,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080007172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:31,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:24:31,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 04:24:31,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517951442] [2021-06-05 04:24:31,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:24:31,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:24:31,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:24:31,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:24:31,688 INFO L87 Difference]: Start difference. First operand 118 states and 300 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:32,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:24:32,008 INFO L93 Difference]: Finished difference Result 173 states and 397 transitions. [2021-06-05 04:24:32,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:24:32,009 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 04:24:32,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:24:32,010 INFO L225 Difference]: With dead ends: 173 [2021-06-05 04:24:32,010 INFO L226 Difference]: Without dead ends: 170 [2021-06-05 04:24:32,010 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 436.9ms TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:24:32,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-06-05 04:24:32,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 116. [2021-06-05 04:24:32,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.5565217391304347) internal successors, (294), 115 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:32,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 294 transitions. [2021-06-05 04:24:32,013 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 294 transitions. Word has length 14 [2021-06-05 04:24:32,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:24:32,013 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 294 transitions. [2021-06-05 04:24:32,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:32,013 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 294 transitions. [2021-06-05 04:24:32,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:24:32,013 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:24:32,013 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:24:32,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable414,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:32,229 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:24:32,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:24:32,229 INFO L82 PathProgramCache]: Analyzing trace with hash 351187404, now seen corresponding path program 52 times [2021-06-05 04:24:32,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:24:32,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860223533] [2021-06-05 04:24:32,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:24:32,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:32,301 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:32,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:24:32,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860223533] [2021-06-05 04:24:32,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860223533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:32,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905236711] [2021-06-05 04:24:32,302 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:32,328 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:24:32,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:24:32,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:24:32,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:24:32,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:24:32,412 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:32,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:32,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:24:32,416 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:32,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:24:32,419 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:32,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:32,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:32,422 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:32,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:24:32,426 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:32,427 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:24:32,428 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:32,451 INFO L628 ElimStorePlain]: treesize reduction 26, result has 43.5 percent of original size [2021-06-05 04:24:32,451 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:24:32,452 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:24:32,452 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:107, output treesize:20 [2021-06-05 04:24:32,476 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:32,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905236711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:32,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:24:32,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:24:32,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349038042] [2021-06-05 04:24:32,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:24:32,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:24:32,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:24:32,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:24:32,477 INFO L87 Difference]: Start difference. First operand 116 states and 294 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:32,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:24:32,721 INFO L93 Difference]: Finished difference Result 155 states and 375 transitions. [2021-06-05 04:24:32,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:24:32,722 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:24:32,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:24:32,722 INFO L225 Difference]: With dead ends: 155 [2021-06-05 04:24:32,723 INFO L226 Difference]: Without dead ends: 146 [2021-06-05 04:24:32,723 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 273.2ms TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:24:32,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-06-05 04:24:32,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 113. [2021-06-05 04:24:32,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.5714285714285716) internal successors, (288), 112 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:32,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 288 transitions. [2021-06-05 04:24:32,725 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 288 transitions. Word has length 15 [2021-06-05 04:24:32,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:24:32,725 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 288 transitions. [2021-06-05 04:24:32,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:32,726 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 288 transitions. [2021-06-05 04:24:32,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:24:32,726 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:24:32,726 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:24:32,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-06-05 04:24:32,941 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:24:32,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:24:32,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1964128954, now seen corresponding path program 53 times [2021-06-05 04:24:32,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:24:32,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758210280] [2021-06-05 04:24:32,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:24:32,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:33,019 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:33,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:24:33,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758210280] [2021-06-05 04:24:33,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758210280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:33,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470991378] [2021-06-05 04:24:33,019 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:33,062 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:24:33,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:24:33,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:24:33,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:24:33,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:33,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:24:33,154 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:33,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:33,157 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:33,171 INFO L628 ElimStorePlain]: treesize reduction 27, result has 30.8 percent of original size [2021-06-05 04:24:33,171 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:24:33,172 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:24:33,172 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:12 [2021-06-05 04:24:33,189 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:33,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470991378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:33,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:24:33,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:24:33,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360428829] [2021-06-05 04:24:33,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:24:33,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:24:33,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:24:33,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:24:33,190 INFO L87 Difference]: Start difference. First operand 113 states and 288 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:33,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:24:33,303 INFO L93 Difference]: Finished difference Result 155 states and 380 transitions. [2021-06-05 04:24:33,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:24:33,303 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:24:33,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:24:33,304 INFO L225 Difference]: With dead ends: 155 [2021-06-05 04:24:33,304 INFO L226 Difference]: Without dead ends: 155 [2021-06-05 04:24:33,304 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 163.6ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:24:33,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-06-05 04:24:33,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 114. [2021-06-05 04:24:33,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.575221238938053) internal successors, (291), 113 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:33,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 291 transitions. [2021-06-05 04:24:33,306 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 291 transitions. Word has length 15 [2021-06-05 04:24:33,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:24:33,306 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 291 transitions. [2021-06-05 04:24:33,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:33,307 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 291 transitions. [2021-06-05 04:24:33,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:24:33,307 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:24:33,307 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:24:33,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable438,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:33,517 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:24:33,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:24:33,517 INFO L82 PathProgramCache]: Analyzing trace with hash -313196838, now seen corresponding path program 54 times [2021-06-05 04:24:33,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:24:33,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212814774] [2021-06-05 04:24:33,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:24:33,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:33,625 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:33,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:24:33,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212814774] [2021-06-05 04:24:33,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212814774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:33,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070814424] [2021-06-05 04:24:33,625 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:33,664 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:24:33,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:24:33,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:24:33,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:24:33,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:33,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:33,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:33,750 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:33,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:33,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:33,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:24:33,754 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:33,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:33,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:33,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:24:33,763 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:33,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:33,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:33,766 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:33,800 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:24:33,800 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:24:33,800 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:24:33,800 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:24:33,848 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:33,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070814424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:33,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:24:33,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:24:33,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291413527] [2021-06-05 04:24:33,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:24:33,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:24:33,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:24:33,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:24:33,849 INFO L87 Difference]: Start difference. First operand 114 states and 291 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:34,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:24:34,188 INFO L93 Difference]: Finished difference Result 200 states and 455 transitions. [2021-06-05 04:24:34,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:24:34,189 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:24:34,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:24:34,190 INFO L225 Difference]: With dead ends: 200 [2021-06-05 04:24:34,190 INFO L226 Difference]: Without dead ends: 200 [2021-06-05 04:24:34,190 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 378.3ms TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:24:34,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-06-05 04:24:34,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 120. [2021-06-05 04:24:34,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.6218487394957983) internal successors, (312), 119 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:34,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 312 transitions. [2021-06-05 04:24:34,192 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 312 transitions. Word has length 15 [2021-06-05 04:24:34,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:24:34,192 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 312 transitions. [2021-06-05 04:24:34,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:34,192 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 312 transitions. [2021-06-05 04:24:34,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:24:34,193 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:24:34,193 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:24:34,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable440 [2021-06-05 04:24:34,393 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:24:34,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:24:34,394 INFO L82 PathProgramCache]: Analyzing trace with hash 488419390, now seen corresponding path program 55 times [2021-06-05 04:24:34,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:24:34,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889565646] [2021-06-05 04:24:34,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:24:34,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:34,482 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:34,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:24:34,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889565646] [2021-06-05 04:24:34,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889565646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:34,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099508650] [2021-06-05 04:24:34,482 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:34,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:34,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:24:34,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:24:34,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:34,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:34,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:34,593 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:34,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:34,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:34,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:24:34,596 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:34,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:34,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:34,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:24:34,600 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:34,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:34,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:34,603 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:34,636 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:24:34,636 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:24:34,637 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:24:34,637 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:24:34,703 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:34,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099508650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:34,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:24:34,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:24:34,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967626469] [2021-06-05 04:24:34,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:24:34,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:24:34,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:24:34,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:24:34,704 INFO L87 Difference]: Start difference. First operand 120 states and 312 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:35,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:24:35,431 INFO L93 Difference]: Finished difference Result 212 states and 477 transitions. [2021-06-05 04:24:35,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:24:35,431 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:24:35,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:24:35,432 INFO L225 Difference]: With dead ends: 212 [2021-06-05 04:24:35,432 INFO L226 Difference]: Without dead ends: 205 [2021-06-05 04:24:35,432 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 727.5ms TimeCoverageRelationStatistics Valid=155, Invalid=775, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:24:35,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-06-05 04:24:35,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 126. [2021-06-05 04:24:35,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.632) internal successors, (329), 125 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:35,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 329 transitions. [2021-06-05 04:24:35,444 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 329 transitions. Word has length 15 [2021-06-05 04:24:35,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:24:35,444 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 329 transitions. [2021-06-05 04:24:35,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:35,444 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 329 transitions. [2021-06-05 04:24:35,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:24:35,445 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:24:35,445 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:24:35,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-06-05 04:24:35,655 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:24:35,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:24:35,656 INFO L82 PathProgramCache]: Analyzing trace with hash -2088204200, now seen corresponding path program 56 times [2021-06-05 04:24:35,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:24:35,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224566931] [2021-06-05 04:24:35,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:24:35,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:35,734 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:35,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:24:35,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224566931] [2021-06-05 04:24:35,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224566931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:35,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769722650] [2021-06-05 04:24:35,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:35,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:24:35,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:24:35,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:24:35,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:24:35,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:35,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:35,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:35,847 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:35,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:35,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:35,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:24:35,852 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:35,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:35,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:35,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:24:35,857 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:35,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:35,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:35,861 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:35,905 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:24:35,905 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:24:35,906 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:24:35,906 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:24:35,951 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:35,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769722650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:35,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:24:35,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:24:35,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713025276] [2021-06-05 04:24:35,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:24:35,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:24:35,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:24:35,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:24:35,952 INFO L87 Difference]: Start difference. First operand 126 states and 329 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:36,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:24:36,342 INFO L93 Difference]: Finished difference Result 199 states and 462 transitions. [2021-06-05 04:24:36,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:24:36,342 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:24:36,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:24:36,343 INFO L225 Difference]: With dead ends: 199 [2021-06-05 04:24:36,343 INFO L226 Difference]: Without dead ends: 199 [2021-06-05 04:24:36,343 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 406.9ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:24:36,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-06-05 04:24:36,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 126. [2021-06-05 04:24:36,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.616) internal successors, (327), 125 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:36,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 327 transitions. [2021-06-05 04:24:36,345 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 327 transitions. Word has length 15 [2021-06-05 04:24:36,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:24:36,345 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 327 transitions. [2021-06-05 04:24:36,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:36,345 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 327 transitions. [2021-06-05 04:24:36,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:24:36,346 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:24:36,346 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:24:36,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable449 [2021-06-05 04:24:36,546 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:24:36,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:24:36,547 INFO L82 PathProgramCache]: Analyzing trace with hash 496149788, now seen corresponding path program 57 times [2021-06-05 04:24:36,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:24:36,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990273114] [2021-06-05 04:24:36,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:24:36,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:36,621 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:36,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:24:36,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990273114] [2021-06-05 04:24:36,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990273114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:36,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140273084] [2021-06-05 04:24:36,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:36,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:24:36,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:24:36,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:24:36,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:24:36,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:36,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:36,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:24:36,770 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:36,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:36,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:36,773 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:36,794 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:24:36,795 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:24:36,795 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:24:36,796 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:24:36,818 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:36,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140273084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:36,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:24:36,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:24:36,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11281739] [2021-06-05 04:24:36,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:24:36,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:24:36,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:24:36,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:24:36,819 INFO L87 Difference]: Start difference. First operand 126 states and 327 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:37,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:24:37,061 INFO L93 Difference]: Finished difference Result 187 states and 454 transitions. [2021-06-05 04:24:37,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:24:37,062 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:24:37,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:24:37,062 INFO L225 Difference]: With dead ends: 187 [2021-06-05 04:24:37,062 INFO L226 Difference]: Without dead ends: 187 [2021-06-05 04:24:37,062 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 269.8ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:24:37,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-06-05 04:24:37,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 128. [2021-06-05 04:24:37,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.6141732283464565) internal successors, (332), 127 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:37,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 332 transitions. [2021-06-05 04:24:37,065 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 332 transitions. Word has length 15 [2021-06-05 04:24:37,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:24:37,065 INFO L482 AbstractCegarLoop]: Abstraction has 128 states and 332 transitions. [2021-06-05 04:24:37,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:37,065 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 332 transitions. [2021-06-05 04:24:37,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:24:37,065 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:24:37,066 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:24:37,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable453 [2021-06-05 04:24:37,281 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:24:37,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:24:37,281 INFO L82 PathProgramCache]: Analyzing trace with hash -993255208, now seen corresponding path program 58 times [2021-06-05 04:24:37,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:24:37,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750009235] [2021-06-05 04:24:37,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:24:37,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:37,356 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:37,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:24:37,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750009235] [2021-06-05 04:24:37,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750009235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:37,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481861578] [2021-06-05 04:24:37,356 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:37,394 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:24:37,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:24:37,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:24:37,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:24:37,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:37,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:37,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:24:37,514 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:37,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:37,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:37,518 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:37,539 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:24:37,540 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:24:37,541 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:24:37,541 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:24:37,574 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:37,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481861578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:37,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:24:37,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:24:37,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587549915] [2021-06-05 04:24:37,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:24:37,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:24:37,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:24:37,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:24:37,575 INFO L87 Difference]: Start difference. First operand 128 states and 332 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:37,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:24:37,692 INFO L93 Difference]: Finished difference Result 170 states and 424 transitions. [2021-06-05 04:24:37,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:24:37,692 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:24:37,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:24:37,693 INFO L225 Difference]: With dead ends: 170 [2021-06-05 04:24:37,693 INFO L226 Difference]: Without dead ends: 170 [2021-06-05 04:24:37,693 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 138.0ms TimeCoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:24:37,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-06-05 04:24:37,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 128. [2021-06-05 04:24:37,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.6141732283464565) internal successors, (332), 127 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:37,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 332 transitions. [2021-06-05 04:24:37,697 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 332 transitions. Word has length 15 [2021-06-05 04:24:37,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:24:37,698 INFO L482 AbstractCegarLoop]: Abstraction has 128 states and 332 transitions. [2021-06-05 04:24:37,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:37,698 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 332 transitions. [2021-06-05 04:24:37,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:24:37,698 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:24:37,698 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:24:37,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable456 [2021-06-05 04:24:37,923 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:24:37,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:24:37,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1505045474, now seen corresponding path program 59 times [2021-06-05 04:24:37,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:24:37,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441917700] [2021-06-05 04:24:37,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:24:37,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:37,986 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:37,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:24:37,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441917700] [2021-06-05 04:24:37,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441917700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:37,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343573512] [2021-06-05 04:24:37,986 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:38,013 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:24:38,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:24:38,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:24:38,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:24:38,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:38,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:38,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:24:38,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:38,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:38,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:38,097 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:38,121 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-06-05 04:24:38,121 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:24:38,122 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:24:38,122 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-06-05 04:24:38,149 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:38,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343573512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:38,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:24:38,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:24:38,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373502791] [2021-06-05 04:24:38,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:24:38,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:24:38,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:24:38,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:24:38,150 INFO L87 Difference]: Start difference. First operand 128 states and 332 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:38,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:24:38,341 INFO L93 Difference]: Finished difference Result 205 states and 480 transitions. [2021-06-05 04:24:38,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:24:38,342 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:24:38,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:24:38,342 INFO L225 Difference]: With dead ends: 205 [2021-06-05 04:24:38,342 INFO L226 Difference]: Without dead ends: 205 [2021-06-05 04:24:38,343 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 170.9ms TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:24:38,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-06-05 04:24:38,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 140. [2021-06-05 04:24:38,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.697841726618705) internal successors, (375), 139 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:38,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 375 transitions. [2021-06-05 04:24:38,345 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 375 transitions. Word has length 15 [2021-06-05 04:24:38,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:24:38,345 INFO L482 AbstractCegarLoop]: Abstraction has 140 states and 375 transitions. [2021-06-05 04:24:38,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:38,345 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 375 transitions. [2021-06-05 04:24:38,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:24:38,346 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:24:38,346 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:24:38,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable459,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:38,546 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:24:38,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:24:38,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1870221114, now seen corresponding path program 60 times [2021-06-05 04:24:38,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:24:38,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699600669] [2021-06-05 04:24:38,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:24:38,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:38,616 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:38,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:24:38,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699600669] [2021-06-05 04:24:38,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699600669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:38,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228014066] [2021-06-05 04:24:38,617 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:38,661 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:24:38,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:24:38,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:24:38,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:24:38,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:24:38,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:38,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:24:38,766 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:38,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:24:38,769 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:38,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:38,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:38,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:24:38,774 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:38,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:24:38,777 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:38,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:38,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:38,781 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:38,819 INFO L628 ElimStorePlain]: treesize reduction 43, result has 40.3 percent of original size [2021-06-05 04:24:38,819 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:24:38,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:24:38,820 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-06-05 04:24:38,856 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:38,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228014066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:38,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:24:38,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:24:38,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502512255] [2021-06-05 04:24:38,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:24:38,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:24:38,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:24:38,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:24:38,857 INFO L87 Difference]: Start difference. First operand 140 states and 375 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:39,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:24:39,209 INFO L93 Difference]: Finished difference Result 187 states and 444 transitions. [2021-06-05 04:24:39,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:24:39,209 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:24:39,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:24:39,210 INFO L225 Difference]: With dead ends: 187 [2021-06-05 04:24:39,210 INFO L226 Difference]: Without dead ends: 183 [2021-06-05 04:24:39,210 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 331.1ms TimeCoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:24:39,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-06-05 04:24:39,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 142. [2021-06-05 04:24:39,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.652482269503546) internal successors, (374), 141 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:39,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 374 transitions. [2021-06-05 04:24:39,213 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 374 transitions. Word has length 15 [2021-06-05 04:24:39,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:24:39,213 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 374 transitions. [2021-06-05 04:24:39,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:39,213 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 374 transitions. [2021-06-05 04:24:39,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:24:39,213 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:24:39,213 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:24:39,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:39,421 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:24:39,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:24:39,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1497315076, now seen corresponding path program 61 times [2021-06-05 04:24:39,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:24:39,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011163556] [2021-06-05 04:24:39,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:24:39,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:39,492 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:39,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:24:39,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011163556] [2021-06-05 04:24:39,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011163556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:39,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683275548] [2021-06-05 04:24:39,492 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:39,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:39,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:24:39,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:24:39,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:39,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:39,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:39,618 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:39,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:39,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:39,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:24:39,623 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:39,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:39,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:39,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:24:39,627 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:39,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:39,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:39,631 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:39,666 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:24:39,667 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:24:39,667 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:24:39,667 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:24:39,714 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:39,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683275548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:39,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:24:39,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:24:39,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375277819] [2021-06-05 04:24:39,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:24:39,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:24:39,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:24:39,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:24:39,715 INFO L87 Difference]: Start difference. First operand 142 states and 374 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:39,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:24:39,999 INFO L93 Difference]: Finished difference Result 226 states and 506 transitions. [2021-06-05 04:24:39,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:24:39,999 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:24:39,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:24:40,000 INFO L225 Difference]: With dead ends: 226 [2021-06-05 04:24:40,000 INFO L226 Difference]: Without dead ends: 225 [2021-06-05 04:24:40,000 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 266.5ms TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:24:40,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-06-05 04:24:40,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 145. [2021-06-05 04:24:40,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.6805555555555554) internal successors, (386), 144 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:40,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 386 transitions. [2021-06-05 04:24:40,003 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 386 transitions. Word has length 15 [2021-06-05 04:24:40,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:24:40,003 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 386 transitions. [2021-06-05 04:24:40,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:40,003 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 386 transitions. [2021-06-05 04:24:40,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:24:40,004 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:24:40,004 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:24:40,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable466 [2021-06-05 04:24:40,213 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:24:40,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:24:40,213 INFO L82 PathProgramCache]: Analyzing trace with hash -695698848, now seen corresponding path program 62 times [2021-06-05 04:24:40,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:24:40,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934594146] [2021-06-05 04:24:40,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:24:40,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:40,282 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:40,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:24:40,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934594146] [2021-06-05 04:24:40,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934594146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:40,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818060929] [2021-06-05 04:24:40,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:40,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:24:40,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:24:40,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:24:40,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:24:40,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:40,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:40,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:40,375 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:40,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:40,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:40,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:24:40,379 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:40,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:40,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:40,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:24:40,382 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:40,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:40,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:40,385 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:40,418 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:24:40,418 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:24:40,419 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:24:40,419 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:24:40,484 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:40,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818060929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:40,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:24:40,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:24:40,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909750337] [2021-06-05 04:24:40,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:24:40,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:24:40,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:24:40,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:24:40,485 INFO L87 Difference]: Start difference. First operand 145 states and 386 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:40,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:24:40,906 INFO L93 Difference]: Finished difference Result 229 states and 520 transitions. [2021-06-05 04:24:40,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:24:40,906 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:24:40,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:24:40,907 INFO L225 Difference]: With dead ends: 229 [2021-06-05 04:24:40,907 INFO L226 Difference]: Without dead ends: 225 [2021-06-05 04:24:40,907 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 405.3ms TimeCoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:24:40,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-06-05 04:24:40,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 149. [2021-06-05 04:24:40,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.675675675675676) internal successors, (396), 148 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:40,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 396 transitions. [2021-06-05 04:24:40,910 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 396 transitions. Word has length 15 [2021-06-05 04:24:40,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:24:40,910 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 396 transitions. [2021-06-05 04:24:40,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:40,910 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 396 transitions. [2021-06-05 04:24:40,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:24:40,911 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:24:40,911 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:24:41,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:41,133 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:24:41,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:24:41,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1022644858, now seen corresponding path program 63 times [2021-06-05 04:24:41,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:24:41,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306094773] [2021-06-05 04:24:41,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:24:41,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:41,213 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:41,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:24:41,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306094773] [2021-06-05 04:24:41,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306094773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:41,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710140916] [2021-06-05 04:24:41,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:41,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:24:41,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:24:41,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:24:41,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:24:41,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:41,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:41,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:41,339 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:41,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:41,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:41,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:24:41,344 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:41,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:41,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:41,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:24:41,348 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:41,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:41,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:41,352 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:41,390 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:24:41,391 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:24:41,391 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:24:41,392 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:24:41,445 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:41,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710140916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:41,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:24:41,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:24:41,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906025552] [2021-06-05 04:24:41,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:24:41,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:24:41,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:24:41,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:24:41,447 INFO L87 Difference]: Start difference. First operand 149 states and 396 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:41,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:24:41,796 INFO L93 Difference]: Finished difference Result 215 states and 496 transitions. [2021-06-05 04:24:41,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:24:41,796 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:24:41,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:24:41,797 INFO L225 Difference]: With dead ends: 215 [2021-06-05 04:24:41,797 INFO L226 Difference]: Without dead ends: 215 [2021-06-05 04:24:41,797 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 328.3ms TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:24:41,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-06-05 04:24:41,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 146. [2021-06-05 04:24:41,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.6344827586206896) internal successors, (382), 145 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:41,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 382 transitions. [2021-06-05 04:24:41,799 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 382 transitions. Word has length 15 [2021-06-05 04:24:41,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:24:41,799 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 382 transitions. [2021-06-05 04:24:41,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:41,799 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 382 transitions. [2021-06-05 04:24:41,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:24:41,799 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:24:41,799 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:24:42,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable475,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:42,000 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:24:42,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:24:42,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1379198886, now seen corresponding path program 64 times [2021-06-05 04:24:42,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:24:42,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090166681] [2021-06-05 04:24:42,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:24:42,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:42,080 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:42,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:24:42,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090166681] [2021-06-05 04:24:42,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090166681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:42,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551791446] [2021-06-05 04:24:42,080 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:42,105 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:24:42,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:24:42,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:24:42,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:24:42,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:42,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:42,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:42,199 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:42,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:42,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:42,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:24:42,203 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:42,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:42,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:42,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:24:42,207 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:42,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:42,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:42,210 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:42,243 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:24:42,243 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:24:42,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:24:42,244 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:24:42,304 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:42,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551791446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:42,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:24:42,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:24:42,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997060994] [2021-06-05 04:24:42,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:24:42,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:24:42,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:24:42,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:24:42,305 INFO L87 Difference]: Start difference. First operand 146 states and 382 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:42,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:24:42,695 INFO L93 Difference]: Finished difference Result 199 states and 465 transitions. [2021-06-05 04:24:42,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:24:42,696 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:24:42,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:24:42,696 INFO L225 Difference]: With dead ends: 199 [2021-06-05 04:24:42,696 INFO L226 Difference]: Without dead ends: 195 [2021-06-05 04:24:42,697 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 373.6ms TimeCoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:24:42,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-06-05 04:24:42,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 150. [2021-06-05 04:24:42,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.610738255033557) internal successors, (389), 149 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:42,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 389 transitions. [2021-06-05 04:24:42,699 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 389 transitions. Word has length 15 [2021-06-05 04:24:42,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:24:42,699 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 389 transitions. [2021-06-05 04:24:42,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:42,699 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 389 transitions. [2021-06-05 04:24:42,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:24:42,699 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:24:42,699 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:24:42,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable479 [2021-06-05 04:24:42,901 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:24:42,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:24:42,901 INFO L82 PathProgramCache]: Analyzing trace with hash 349848448, now seen corresponding path program 65 times [2021-06-05 04:24:42,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:24:42,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399603331] [2021-06-05 04:24:42,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:24:42,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:42,983 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:42,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:24:42,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399603331] [2021-06-05 04:24:42,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399603331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:42,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682915547] [2021-06-05 04:24:42,984 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:43,015 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:24:43,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:24:43,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:24:43,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:24:43,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:24:43,139 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:43,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:43,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:43,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:43,144 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:43,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:24:43,147 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:43,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:43,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:43,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:24:43,152 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:43,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:24:43,156 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:43,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:24:43,161 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:43,196 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-05 04:24:43,197 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:24:43,198 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:24:43,198 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-05 04:24:43,227 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:43,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682915547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:43,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:24:43,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:24:43,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884782320] [2021-06-05 04:24:43,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:24:43,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:24:43,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:24:43,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:24:43,228 INFO L87 Difference]: Start difference. First operand 150 states and 389 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:43,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:24:43,588 INFO L93 Difference]: Finished difference Result 174 states and 424 transitions. [2021-06-05 04:24:43,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:24:43,588 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:24:43,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:24:43,589 INFO L225 Difference]: With dead ends: 174 [2021-06-05 04:24:43,589 INFO L226 Difference]: Without dead ends: 166 [2021-06-05 04:24:43,589 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 359.6ms TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:24:43,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-06-05 04:24:43,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 150. [2021-06-05 04:24:43,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.5838926174496644) internal successors, (385), 149 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:43,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 385 transitions. [2021-06-05 04:24:43,594 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 385 transitions. Word has length 15 [2021-06-05 04:24:43,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:24:43,594 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 385 transitions. [2021-06-05 04:24:43,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:43,594 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 385 transitions. [2021-06-05 04:24:43,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:24:43,594 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:24:43,594 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:24:43,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable485 [2021-06-05 04:24:43,808 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:24:43,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:24:43,808 INFO L82 PathProgramCache]: Analyzing trace with hash 2117593850, now seen corresponding path program 66 times [2021-06-05 04:24:43,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:24:43,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592991339] [2021-06-05 04:24:43,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:24:43,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:43,871 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:43,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:24:43,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592991339] [2021-06-05 04:24:43,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592991339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:43,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129248864] [2021-06-05 04:24:43,871 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:43,897 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:24:43,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:24:43,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:24:43,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:24:43,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:43,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:43,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:43,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:43,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:43,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:24:43,984 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:44,006 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:24:44,006 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:24:44,007 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:24:44,007 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:24:44,025 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:44,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129248864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:44,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:24:44,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:24:44,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653607202] [2021-06-05 04:24:44,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:24:44,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:24:44,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:24:44,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:24:44,026 INFO L87 Difference]: Start difference. First operand 150 states and 385 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:44,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:24:44,196 INFO L93 Difference]: Finished difference Result 211 states and 497 transitions. [2021-06-05 04:24:44,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:24:44,196 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:24:44,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:24:44,197 INFO L225 Difference]: With dead ends: 211 [2021-06-05 04:24:44,197 INFO L226 Difference]: Without dead ends: 211 [2021-06-05 04:24:44,197 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 149.8ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:24:44,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-06-05 04:24:44,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 151. [2021-06-05 04:24:44,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.5933333333333333) internal successors, (389), 150 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:44,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 389 transitions. [2021-06-05 04:24:44,200 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 389 transitions. Word has length 15 [2021-06-05 04:24:44,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:24:44,200 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 389 transitions. [2021-06-05 04:24:44,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:44,200 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 389 transitions. [2021-06-05 04:24:44,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:24:44,200 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:24:44,201 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:24:44,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:44,413 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:24:44,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:24:44,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1913634692, now seen corresponding path program 67 times [2021-06-05 04:24:44,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:24:44,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679932850] [2021-06-05 04:24:44,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:24:44,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:44,496 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:44,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:24:44,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679932850] [2021-06-05 04:24:44,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679932850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:44,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568806572] [2021-06-05 04:24:44,497 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:44,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:44,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:24:44,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:24:44,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:44,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:44,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:44,614 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:44,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:44,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:44,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:24:44,619 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:44,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:44,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:44,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:24:44,622 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:44,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:44,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:44,625 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:44,658 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:24:44,659 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:24:44,659 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:24:44,659 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:24:44,705 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:44,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568806572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:44,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:24:44,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:24:44,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069820636] [2021-06-05 04:24:44,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:24:44,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:24:44,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:24:44,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:24:44,706 INFO L87 Difference]: Start difference. First operand 151 states and 389 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:44,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:24:44,843 INFO L93 Difference]: Finished difference Result 214 states and 495 transitions. [2021-06-05 04:24:44,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:24:44,844 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:24:44,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:24:44,844 INFO L225 Difference]: With dead ends: 214 [2021-06-05 04:24:44,844 INFO L226 Difference]: Without dead ends: 214 [2021-06-05 04:24:44,844 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 201.0ms TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:24:44,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-06-05 04:24:44,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 156. [2021-06-05 04:24:44,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.632258064516129) internal successors, (408), 155 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:44,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 408 transitions. [2021-06-05 04:24:44,847 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 408 transitions. Word has length 15 [2021-06-05 04:24:44,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:24:44,847 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 408 transitions. [2021-06-05 04:24:44,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:44,847 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 408 transitions. [2021-06-05 04:24:44,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:24:44,847 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:24:44,847 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:24:45,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable495,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:45,048 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:24:45,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:24:45,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1112018464, now seen corresponding path program 68 times [2021-06-05 04:24:45,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:24:45,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8900113] [2021-06-05 04:24:45,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:24:45,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:45,138 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:45,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:24:45,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8900113] [2021-06-05 04:24:45,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8900113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:45,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46442866] [2021-06-05 04:24:45,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:45,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:24:45,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:24:45,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:24:45,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:24:45,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:45,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:45,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:45,261 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:45,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:45,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:45,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:24:45,266 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:45,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:45,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:45,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:24:45,270 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:45,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:45,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:45,273 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:45,311 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:24:45,311 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:24:45,312 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:24:45,312 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:24:45,387 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:45,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46442866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:45,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:24:45,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:24:45,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484795318] [2021-06-05 04:24:45,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:24:45,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:24:45,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:24:45,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:24:45,388 INFO L87 Difference]: Start difference. First operand 156 states and 408 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:45,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:24:45,999 INFO L93 Difference]: Finished difference Result 220 states and 506 transitions. [2021-06-05 04:24:45,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:24:45,999 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:24:45,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:24:46,000 INFO L225 Difference]: With dead ends: 220 [2021-06-05 04:24:46,000 INFO L226 Difference]: Without dead ends: 213 [2021-06-05 04:24:46,000 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 607.4ms TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:24:46,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-06-05 04:24:46,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 159. [2021-06-05 04:24:46,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.632911392405063) internal successors, (416), 158 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:46,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 416 transitions. [2021-06-05 04:24:46,003 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 416 transitions. Word has length 15 [2021-06-05 04:24:46,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:24:46,003 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 416 transitions. [2021-06-05 04:24:46,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:46,003 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 416 transitions. [2021-06-05 04:24:46,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:24:46,004 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:24:46,004 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:24:46,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable499 [2021-06-05 04:24:46,213 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:24:46,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:24:46,213 INFO L82 PathProgramCache]: Analyzing trace with hash 606325242, now seen corresponding path program 69 times [2021-06-05 04:24:46,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:24:46,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249490014] [2021-06-05 04:24:46,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:24:46,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:46,295 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:46,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:24:46,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249490014] [2021-06-05 04:24:46,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249490014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:46,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819949063] [2021-06-05 04:24:46,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:46,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:24:46,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:24:46,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:24:46,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:24:46,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:46,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:46,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:46,421 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:46,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:46,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:46,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:24:46,426 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:46,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:46,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:46,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:24:46,430 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:46,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:46,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:46,434 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:46,473 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:24:46,474 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:24:46,474 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:24:46,474 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:24:46,518 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:46,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819949063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:46,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:24:46,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:24:46,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236920044] [2021-06-05 04:24:46,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:24:46,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:24:46,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:24:46,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:24:46,519 INFO L87 Difference]: Start difference. First operand 159 states and 416 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:46,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:24:46,836 INFO L93 Difference]: Finished difference Result 206 states and 487 transitions. [2021-06-05 04:24:46,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:24:46,836 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:24:46,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:24:46,837 INFO L225 Difference]: With dead ends: 206 [2021-06-05 04:24:46,837 INFO L226 Difference]: Without dead ends: 206 [2021-06-05 04:24:46,837 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 335.4ms TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:24:46,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-06-05 04:24:46,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 156. [2021-06-05 04:24:46,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.6) internal successors, (403), 155 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:46,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 403 transitions. [2021-06-05 04:24:46,839 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 403 transitions. Word has length 15 [2021-06-05 04:24:46,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:24:46,839 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 403 transitions. [2021-06-05 04:24:46,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:46,839 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 403 transitions. [2021-06-05 04:24:46,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:24:46,840 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:24:46,840 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:24:47,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable504,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:47,041 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:24:47,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:24:47,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1104288066, now seen corresponding path program 70 times [2021-06-05 04:24:47,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:24:47,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411680239] [2021-06-05 04:24:47,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:24:47,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:47,107 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:47,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:24:47,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411680239] [2021-06-05 04:24:47,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411680239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:47,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070352767] [2021-06-05 04:24:47,108 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:47,134 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:24:47,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:24:47,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:24:47,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:24:47,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:47,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:47,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:24:47,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:47,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:47,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:47,233 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:47,255 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:24:47,255 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:24:47,255 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:24:47,256 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:24:47,274 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:47,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070352767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:47,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:24:47,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:24:47,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803174058] [2021-06-05 04:24:47,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:24:47,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:24:47,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:24:47,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:24:47,275 INFO L87 Difference]: Start difference. First operand 156 states and 403 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:47,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:24:47,514 INFO L93 Difference]: Finished difference Result 193 states and 478 transitions. [2021-06-05 04:24:47,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:24:47,514 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:24:47,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:24:47,515 INFO L225 Difference]: With dead ends: 193 [2021-06-05 04:24:47,515 INFO L226 Difference]: Without dead ends: 193 [2021-06-05 04:24:47,515 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 257.4ms TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:24:47,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-06-05 04:24:47,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 158. [2021-06-05 04:24:47,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.605095541401274) internal successors, (409), 157 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:47,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 409 transitions. [2021-06-05 04:24:47,517 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 409 transitions. Word has length 15 [2021-06-05 04:24:47,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:24:47,517 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 409 transitions. [2021-06-05 04:24:47,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:47,518 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 409 transitions. [2021-06-05 04:24:47,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:24:47,518 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:24:47,518 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:24:47,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:47,718 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:24:47,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:24:47,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1701274234, now seen corresponding path program 71 times [2021-06-05 04:24:47,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:24:47,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160116275] [2021-06-05 04:24:47,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:24:47,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:47,787 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:47,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:24:47,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160116275] [2021-06-05 04:24:47,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160116275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:47,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642720314] [2021-06-05 04:24:47,788 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:47,825 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:24:47,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:24:47,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:24:47,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:24:47,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:47,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:47,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:24:47,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:47,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:47,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:47,939 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:47,963 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:24:47,963 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:24:47,964 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:24:47,964 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:24:47,983 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:47,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642720314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:47,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:24:47,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:24:47,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447539547] [2021-06-05 04:24:47,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:24:47,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:24:47,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:24:47,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:24:47,984 INFO L87 Difference]: Start difference. First operand 158 states and 409 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:48,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:24:48,116 INFO L93 Difference]: Finished difference Result 187 states and 466 transitions. [2021-06-05 04:24:48,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:24:48,117 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:24:48,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:24:48,120 INFO L225 Difference]: With dead ends: 187 [2021-06-05 04:24:48,120 INFO L226 Difference]: Without dead ends: 187 [2021-06-05 04:24:48,121 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 136.4ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:24:48,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-06-05 04:24:48,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 158. [2021-06-05 04:24:48,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.605095541401274) internal successors, (409), 157 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:48,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 409 transitions. [2021-06-05 04:24:48,123 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 409 transitions. Word has length 15 [2021-06-05 04:24:48,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:24:48,123 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 409 transitions. [2021-06-05 04:24:48,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:48,123 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 409 transitions. [2021-06-05 04:24:48,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:24:48,124 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:24:48,124 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:24:48,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable511,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:48,333 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:24:48,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:24:48,333 INFO L82 PathProgramCache]: Analyzing trace with hash 202352474, now seen corresponding path program 72 times [2021-06-05 04:24:48,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:24:48,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615592175] [2021-06-05 04:24:48,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:24:48,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:48,415 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:48,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:24:48,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615592175] [2021-06-05 04:24:48,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615592175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:48,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666758349] [2021-06-05 04:24:48,416 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:48,471 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:24:48,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:24:48,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:24:48,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:24:48,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:48,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:48,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:24:48,584 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:48,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:48,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:48,587 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:48,605 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-06-05 04:24:48,605 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:24:48,606 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:24:48,606 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-06-05 04:24:48,626 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:48,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666758349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:48,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:24:48,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:24:48,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90291736] [2021-06-05 04:24:48,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:24:48,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:24:48,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:24:48,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:24:48,627 INFO L87 Difference]: Start difference. First operand 158 states and 409 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:48,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:24:48,795 INFO L93 Difference]: Finished difference Result 231 states and 540 transitions. [2021-06-05 04:24:48,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:24:48,796 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:24:48,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:24:48,796 INFO L225 Difference]: With dead ends: 231 [2021-06-05 04:24:48,796 INFO L226 Difference]: Without dead ends: 231 [2021-06-05 04:24:48,797 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 163.4ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:24:48,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-06-05 04:24:48,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 171. [2021-06-05 04:24:48,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.6470588235294117) internal successors, (450), 170 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:48,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 450 transitions. [2021-06-05 04:24:48,800 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 450 transitions. Word has length 15 [2021-06-05 04:24:48,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:24:48,800 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 450 transitions. [2021-06-05 04:24:48,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:48,800 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 450 transitions. [2021-06-05 04:24:48,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:24:48,801 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:24:48,801 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:24:49,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable514 [2021-06-05 04:24:49,024 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:24:49,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:24:49,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1756401598, now seen corresponding path program 73 times [2021-06-05 04:24:49,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:24:49,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832649217] [2021-06-05 04:24:49,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:24:49,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:49,097 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:49,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:24:49,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832649217] [2021-06-05 04:24:49,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832649217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:49,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639627792] [2021-06-05 04:24:49,098 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:49,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:49,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:24:49,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:24:49,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:24:49,241 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:49,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:24:49,244 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:49,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:24:49,247 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:49,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:49,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:49,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:24:49,250 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:49,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:24:49,253 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:49,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:49,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:49,256 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:49,288 INFO L628 ElimStorePlain]: treesize reduction 43, result has 40.3 percent of original size [2021-06-05 04:24:49,288 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:24:49,289 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:24:49,289 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-06-05 04:24:49,319 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:49,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639627792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:49,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:24:49,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:24:49,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235688752] [2021-06-05 04:24:49,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:24:49,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:24:49,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:24:49,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:24:49,319 INFO L87 Difference]: Start difference. First operand 171 states and 450 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:49,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:24:49,656 INFO L93 Difference]: Finished difference Result 216 states and 508 transitions. [2021-06-05 04:24:49,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:24:49,656 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:24:49,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:24:49,657 INFO L225 Difference]: With dead ends: 216 [2021-06-05 04:24:49,657 INFO L226 Difference]: Without dead ends: 213 [2021-06-05 04:24:49,657 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 315.0ms TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:24:49,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-06-05 04:24:49,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 174. [2021-06-05 04:24:49,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.6184971098265897) internal successors, (453), 173 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:49,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 453 transitions. [2021-06-05 04:24:49,659 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 453 transitions. Word has length 15 [2021-06-05 04:24:49,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:24:49,659 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 453 transitions. [2021-06-05 04:24:49,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:49,659 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 453 transitions. [2021-06-05 04:24:49,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:24:49,660 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:24:49,660 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:24:49,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable516 [2021-06-05 04:24:49,860 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:24:49,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:24:49,861 INFO L82 PathProgramCache]: Analyzing trace with hash 441994812, now seen corresponding path program 74 times [2021-06-05 04:24:49,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:24:49,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994298524] [2021-06-05 04:24:49,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:24:49,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:49,938 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:49,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:24:49,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994298524] [2021-06-05 04:24:49,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994298524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:49,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167010594] [2021-06-05 04:24:49,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:49,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:24:49,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:24:49,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:24:49,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:24:50,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:50,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:50,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:24:50,069 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:50,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:50,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:50,072 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:50,089 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-06-05 04:24:50,089 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:24:50,090 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:24:50,090 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-06-05 04:24:50,110 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:50,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167010594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:50,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:24:50,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:24:50,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533172423] [2021-06-05 04:24:50,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:24:50,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:24:50,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:24:50,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:24:50,112 INFO L87 Difference]: Start difference. First operand 174 states and 453 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:50,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:24:50,553 INFO L93 Difference]: Finished difference Result 248 states and 574 transitions. [2021-06-05 04:24:50,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:24:50,553 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:24:50,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:24:50,554 INFO L225 Difference]: With dead ends: 248 [2021-06-05 04:24:50,554 INFO L226 Difference]: Without dead ends: 248 [2021-06-05 04:24:50,554 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 416.8ms TimeCoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:24:50,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-06-05 04:24:50,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 172. [2021-06-05 04:24:50,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.6374269005847952) internal successors, (451), 171 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:50,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 451 transitions. [2021-06-05 04:24:50,557 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 451 transitions. Word has length 15 [2021-06-05 04:24:50,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:24:50,557 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 451 transitions. [2021-06-05 04:24:50,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:50,557 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 451 transitions. [2021-06-05 04:24:50,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:24:50,557 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:24:50,557 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:24:50,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable521 [2021-06-05 04:24:50,758 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:24:50,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:24:50,758 INFO L82 PathProgramCache]: Analyzing trace with hash -477705896, now seen corresponding path program 75 times [2021-06-05 04:24:50,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:24:50,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810168301] [2021-06-05 04:24:50,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:24:50,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:50,848 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:50,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:24:50,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810168301] [2021-06-05 04:24:50,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810168301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:50,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779875544] [2021-06-05 04:24:50,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:50,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:24:50,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:24:50,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:24:50,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:24:51,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:24:51,035 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:51,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:24:51,039 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:51,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:24:51,042 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:51,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:51,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:51,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:24:51,047 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:51,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:24:51,051 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:51,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:51,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:51,055 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:51,087 INFO L628 ElimStorePlain]: treesize reduction 43, result has 40.3 percent of original size [2021-06-05 04:24:51,087 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:24:51,087 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:24:51,088 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-06-05 04:24:51,117 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:51,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779875544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:51,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:24:51,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:24:51,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998232523] [2021-06-05 04:24:51,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:24:51,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:24:51,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:24:51,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:24:51,118 INFO L87 Difference]: Start difference. First operand 172 states and 451 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:51,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:24:51,584 INFO L93 Difference]: Finished difference Result 217 states and 515 transitions. [2021-06-05 04:24:51,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:24:51,584 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:24:51,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:24:51,585 INFO L225 Difference]: With dead ends: 217 [2021-06-05 04:24:51,585 INFO L226 Difference]: Without dead ends: 213 [2021-06-05 04:24:51,585 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 460.2ms TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:24:51,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-06-05 04:24:51,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 173. [2021-06-05 04:24:51,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.633720930232558) internal successors, (453), 172 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:51,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 453 transitions. [2021-06-05 04:24:51,588 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 453 transitions. Word has length 15 [2021-06-05 04:24:51,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:24:51,588 INFO L482 AbstractCegarLoop]: Abstraction has 173 states and 453 transitions. [2021-06-05 04:24:51,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:51,588 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 453 transitions. [2021-06-05 04:24:51,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:24:51,589 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:24:51,589 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:24:51,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable523,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:51,797 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:24:51,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:24:51,797 INFO L82 PathProgramCache]: Analyzing trace with hash 449725210, now seen corresponding path program 76 times [2021-06-05 04:24:51,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:24:51,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236005970] [2021-06-05 04:24:51,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:24:51,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:51,869 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:51,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:24:51,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236005970] [2021-06-05 04:24:51,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236005970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:51,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800554794] [2021-06-05 04:24:51,869 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:51,896 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:24:51,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:24:51,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:24:51,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:24:51,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:51,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:51,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:51,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:51,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:51,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:51,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:24:51,984 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:51,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:51,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:51,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:24:51,988 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:51,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:51,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:51,991 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:52,025 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:24:52,025 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:24:52,026 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:24:52,026 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:24:52,074 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:52,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800554794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:52,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:24:52,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:24:52,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293692661] [2021-06-05 04:24:52,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:24:52,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:24:52,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:24:52,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:24:52,075 INFO L87 Difference]: Start difference. First operand 173 states and 453 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:52,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:24:52,445 INFO L93 Difference]: Finished difference Result 262 states and 580 transitions. [2021-06-05 04:24:52,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:24:52,445 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:24:52,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:24:52,446 INFO L225 Difference]: With dead ends: 262 [2021-06-05 04:24:52,446 INFO L226 Difference]: Without dead ends: 262 [2021-06-05 04:24:52,446 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 341.1ms TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:24:52,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-06-05 04:24:52,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 170. [2021-06-05 04:24:52,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.6272189349112427) internal successors, (444), 169 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:52,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 444 transitions. [2021-06-05 04:24:52,450 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 444 transitions. Word has length 15 [2021-06-05 04:24:52,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:24:52,450 INFO L482 AbstractCegarLoop]: Abstraction has 170 states and 444 transitions. [2021-06-05 04:24:52,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:52,450 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 444 transitions. [2021-06-05 04:24:52,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:24:52,451 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:24:52,451 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:24:52,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable528,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:52,665 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:24:52,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:24:52,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1251341438, now seen corresponding path program 77 times [2021-06-05 04:24:52,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:24:52,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912909435] [2021-06-05 04:24:52,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:24:52,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:52,751 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:52,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:24:52,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912909435] [2021-06-05 04:24:52,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912909435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:52,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249317675] [2021-06-05 04:24:52,751 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:52,788 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:24:52,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:24:52,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:24:52,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:24:52,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:52,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:52,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:52,889 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:52,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:52,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:52,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:24:52,893 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:52,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:52,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:52,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:24:52,897 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:52,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:52,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:52,899 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:52,932 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:24:52,933 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:24:52,933 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:24:52,933 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:24:53,001 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:53,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249317675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:53,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:24:53,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:24:53,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64570379] [2021-06-05 04:24:53,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:24:53,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:24:53,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:24:53,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:24:53,002 INFO L87 Difference]: Start difference. First operand 170 states and 444 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:53,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:24:53,439 INFO L93 Difference]: Finished difference Result 235 states and 540 transitions. [2021-06-05 04:24:53,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:24:53,439 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:24:53,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:24:53,440 INFO L225 Difference]: With dead ends: 235 [2021-06-05 04:24:53,440 INFO L226 Difference]: Without dead ends: 231 [2021-06-05 04:24:53,440 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 467.0ms TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:24:53,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-06-05 04:24:53,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 174. [2021-06-05 04:24:53,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.6300578034682083) internal successors, (455), 173 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:53,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 455 transitions. [2021-06-05 04:24:53,443 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 455 transitions. Word has length 15 [2021-06-05 04:24:53,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:24:53,443 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 455 transitions. [2021-06-05 04:24:53,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:53,444 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 455 transitions. [2021-06-05 04:24:53,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:24:53,444 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:24:53,444 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:24:53,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable532 [2021-06-05 04:24:53,661 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:24:53,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:24:53,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1325282152, now seen corresponding path program 78 times [2021-06-05 04:24:53,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:24:53,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95710433] [2021-06-05 04:24:53,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:24:53,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:53,733 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:53,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:24:53,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95710433] [2021-06-05 04:24:53,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95710433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:53,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659409821] [2021-06-05 04:24:53,734 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:53,761 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:24:53,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:24:53,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:24:53,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:24:53,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:53,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:53,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:53,851 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:53,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:53,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:53,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:24:53,855 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:53,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:53,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:53,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:24:53,858 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:53,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:53,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:53,861 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:53,894 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:24:53,894 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:24:53,895 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:24:53,895 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:24:53,945 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:53,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659409821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:53,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:24:53,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:24:53,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902844174] [2021-06-05 04:24:53,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:24:53,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:24:53,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:24:53,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:24:53,946 INFO L87 Difference]: Start difference. First operand 174 states and 455 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:54,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:24:54,209 INFO L93 Difference]: Finished difference Result 226 states and 532 transitions. [2021-06-05 04:24:54,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:24:54,209 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:24:54,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:24:54,210 INFO L225 Difference]: With dead ends: 226 [2021-06-05 04:24:54,210 INFO L226 Difference]: Without dead ends: 226 [2021-06-05 04:24:54,210 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 284.8ms TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:24:54,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-06-05 04:24:54,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 172. [2021-06-05 04:24:54,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.6140350877192984) internal successors, (447), 171 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:54,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 447 transitions. [2021-06-05 04:24:54,213 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 447 transitions. Word has length 15 [2021-06-05 04:24:54,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:24:54,213 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 447 transitions. [2021-06-05 04:24:54,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:54,213 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 447 transitions. [2021-06-05 04:24:54,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:24:54,213 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:24:54,213 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:24:54,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable537,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:54,425 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:24:54,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:24:54,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1164635520, now seen corresponding path program 79 times [2021-06-05 04:24:54,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:24:54,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312695119] [2021-06-05 04:24:54,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:24:54,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:54,486 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:24:54,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:24:54,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312695119] [2021-06-05 04:24:54,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312695119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:54,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413023311] [2021-06-05 04:24:54,487 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:54,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:54,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:24:54,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:24:54,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:54,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:54,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:54,606 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:54,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:54,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:54,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:24:54,610 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:54,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:54,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:54,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:24:54,613 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:54,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:54,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:54,616 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:54,649 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:24:54,650 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:24:54,650 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:24:54,650 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:24:54,710 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:54,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413023311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:54,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:24:54,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 04:24:54,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435461644] [2021-06-05 04:24:54,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:24:54,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:24:54,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:24:54,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:24:54,711 INFO L87 Difference]: Start difference. First operand 172 states and 447 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:55,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:24:55,028 INFO L93 Difference]: Finished difference Result 195 states and 481 transitions. [2021-06-05 04:24:55,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:24:55,028 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:24:55,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:24:55,029 INFO L225 Difference]: With dead ends: 195 [2021-06-05 04:24:55,029 INFO L226 Difference]: Without dead ends: 191 [2021-06-05 04:24:55,029 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 377.2ms TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:24:55,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-06-05 04:24:55,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 174. [2021-06-05 04:24:55,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.61271676300578) internal successors, (452), 173 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:55,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 452 transitions. [2021-06-05 04:24:55,031 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 452 transitions. Word has length 15 [2021-06-05 04:24:55,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:24:55,031 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 452 transitions. [2021-06-05 04:24:55,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:55,031 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 452 transitions. [2021-06-05 04:24:55,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:24:55,032 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:24:55,032 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:24:55,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable541 [2021-06-05 04:24:55,232 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:24:55,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:24:55,233 INFO L82 PathProgramCache]: Analyzing trace with hash 33405594, now seen corresponding path program 80 times [2021-06-05 04:24:55,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:24:55,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258184118] [2021-06-05 04:24:55,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:24:55,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:55,298 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:55,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:24:55,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258184118] [2021-06-05 04:24:55,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258184118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:55,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140048885] [2021-06-05 04:24:55,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:55,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:24:55,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:24:55,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:24:55,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:24:55,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:55,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:55,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:55,413 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:55,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:55,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:55,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:24:55,417 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:55,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:55,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:55,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:24:55,420 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:55,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:55,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:55,423 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:55,456 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:24:55,457 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:24:55,457 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:24:55,457 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:24:55,504 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:55,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140048885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:55,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:24:55,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 04:24:55,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625472556] [2021-06-05 04:24:55,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:24:55,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:24:55,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:24:55,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:24:55,505 INFO L87 Difference]: Start difference. First operand 174 states and 452 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:55,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:24:55,716 INFO L93 Difference]: Finished difference Result 269 states and 611 transitions. [2021-06-05 04:24:55,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:24:55,716 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:24:55,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:24:55,717 INFO L225 Difference]: With dead ends: 269 [2021-06-05 04:24:55,717 INFO L226 Difference]: Without dead ends: 269 [2021-06-05 04:24:55,717 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 215.1ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:24:55,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-06-05 04:24:55,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 182. [2021-06-05 04:24:55,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.657458563535912) internal successors, (481), 181 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:55,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 481 transitions. [2021-06-05 04:24:55,719 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 481 transitions. Word has length 15 [2021-06-05 04:24:55,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:24:55,719 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 481 transitions. [2021-06-05 04:24:55,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:55,720 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 481 transitions. [2021-06-05 04:24:55,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:24:55,720 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:24:55,720 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:24:55,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable547 [2021-06-05 04:24:55,920 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:24:55,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:24:55,921 INFO L82 PathProgramCache]: Analyzing trace with hash 835021822, now seen corresponding path program 81 times [2021-06-05 04:24:55,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:24:55,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978232429] [2021-06-05 04:24:55,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:24:55,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:55,981 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:55,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:24:55,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978232429] [2021-06-05 04:24:55,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978232429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:55,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393463852] [2021-06-05 04:24:55,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:56,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:24:56,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:24:56,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:24:56,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:24:56,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:56,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:56,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:56,079 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:56,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:56,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:56,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:24:56,083 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:56,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:56,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:56,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:24:56,086 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:56,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:56,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:56,089 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:56,122 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:24:56,122 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:24:56,123 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:24:56,123 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:24:56,189 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:56,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393463852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:56,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:24:56,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 04:24:56,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690554532] [2021-06-05 04:24:56,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:24:56,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:24:56,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:24:56,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:24:56,189 INFO L87 Difference]: Start difference. First operand 182 states and 481 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:56,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:24:56,598 INFO L93 Difference]: Finished difference Result 292 states and 678 transitions. [2021-06-05 04:24:56,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:24:56,599 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:24:56,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:24:56,600 INFO L225 Difference]: With dead ends: 292 [2021-06-05 04:24:56,600 INFO L226 Difference]: Without dead ends: 286 [2021-06-05 04:24:56,600 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 408.2ms TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:24:56,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-06-05 04:24:56,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 201. [2021-06-05 04:24:56,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.72) internal successors, (544), 200 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:56,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 544 transitions. [2021-06-05 04:24:56,603 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 544 transitions. Word has length 15 [2021-06-05 04:24:56,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:24:56,604 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 544 transitions. [2021-06-05 04:24:56,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:56,604 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 544 transitions. [2021-06-05 04:24:56,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:24:56,604 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:24:56,604 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:24:56,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable551 [2021-06-05 04:24:56,817 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:24:56,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:24:56,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1741601768, now seen corresponding path program 82 times [2021-06-05 04:24:56,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:24:56,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222978684] [2021-06-05 04:24:56,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:24:56,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:56,885 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:56,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:24:56,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222978684] [2021-06-05 04:24:56,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222978684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:56,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787737743] [2021-06-05 04:24:56,886 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:56,931 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:24:56,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:24:56,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:24:56,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:24:57,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:57,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:57,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:57,015 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:57,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:57,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:57,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:24:57,018 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:57,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:57,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:57,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:24:57,022 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:57,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:57,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:57,025 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:57,057 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:24:57,057 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:24:57,058 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:24:57,058 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:24:57,104 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:57,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787737743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:57,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:24:57,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 04:24:57,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295550601] [2021-06-05 04:24:57,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:24:57,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:24:57,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:24:57,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:24:57,104 INFO L87 Difference]: Start difference. First operand 201 states and 544 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:57,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:24:57,354 INFO L93 Difference]: Finished difference Result 272 states and 647 transitions. [2021-06-05 04:24:57,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:24:57,355 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:24:57,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:24:57,355 INFO L225 Difference]: With dead ends: 272 [2021-06-05 04:24:57,356 INFO L226 Difference]: Without dead ends: 272 [2021-06-05 04:24:57,356 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 280.4ms TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:24:57,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-06-05 04:24:57,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 196. [2021-06-05 04:24:57,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.687179487179487) internal successors, (524), 195 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:57,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 524 transitions. [2021-06-05 04:24:57,358 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 524 transitions. Word has length 15 [2021-06-05 04:24:57,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:24:57,359 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 524 transitions. [2021-06-05 04:24:57,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:57,359 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 524 transitions. [2021-06-05 04:24:57,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:24:57,359 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:24:57,359 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:24:57,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable556 [2021-06-05 04:24:57,561 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:24:57,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:24:57,561 INFO L82 PathProgramCache]: Analyzing trace with hash 842752220, now seen corresponding path program 83 times [2021-06-05 04:24:57,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:24:57,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404478203] [2021-06-05 04:24:57,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:24:57,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:57,631 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:57,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:24:57,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404478203] [2021-06-05 04:24:57,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404478203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:57,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421420031] [2021-06-05 04:24:57,632 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:57,670 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:24:57,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:24:57,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:24:57,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:24:57,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:57,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:57,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:24:57,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:57,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:57,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:57,798 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:57,823 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:24:57,823 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:24:57,824 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:24:57,824 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:24:57,845 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:57,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421420031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:57,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:24:57,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 04:24:57,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732163280] [2021-06-05 04:24:57,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:24:57,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:24:57,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:24:57,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:24:57,846 INFO L87 Difference]: Start difference. First operand 196 states and 524 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:58,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:24:58,034 INFO L93 Difference]: Finished difference Result 273 states and 652 transitions. [2021-06-05 04:24:58,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:24:58,035 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:24:58,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:24:58,036 INFO L225 Difference]: With dead ends: 273 [2021-06-05 04:24:58,036 INFO L226 Difference]: Without dead ends: 273 [2021-06-05 04:24:58,036 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 152.0ms TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:24:58,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-06-05 04:24:58,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 196. [2021-06-05 04:24:58,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.687179487179487) internal successors, (524), 195 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:58,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 524 transitions. [2021-06-05 04:24:58,040 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 524 transitions. Word has length 15 [2021-06-05 04:24:58,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:24:58,040 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 524 transitions. [2021-06-05 04:24:58,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:58,040 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 524 transitions. [2021-06-05 04:24:58,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:24:58,040 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:24:58,040 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:24:58,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable560,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:58,263 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:24:58,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:24:58,263 INFO L82 PathProgramCache]: Analyzing trace with hash 12399386, now seen corresponding path program 84 times [2021-06-05 04:24:58,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:24:58,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952060432] [2021-06-05 04:24:58,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:24:58,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:58,345 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:58,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:24:58,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952060432] [2021-06-05 04:24:58,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952060432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:58,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824285621] [2021-06-05 04:24:58,346 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:58,372 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:24:58,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:24:58,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:24:58,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:24:58,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:58,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:58,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:58,456 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:58,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:58,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:58,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:24:58,460 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:58,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:58,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:58,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:24:58,463 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:58,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:58,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:58,466 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:58,500 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:24:58,500 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:24:58,500 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:24:58,501 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:24:58,547 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:58,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824285621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:58,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:24:58,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:24:58,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861265336] [2021-06-05 04:24:58,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:24:58,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:24:58,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:24:58,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:24:58,548 INFO L87 Difference]: Start difference. First operand 196 states and 524 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:58,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:24:58,741 INFO L93 Difference]: Finished difference Result 276 states and 670 transitions. [2021-06-05 04:24:58,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:24:58,742 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:24:58,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:24:58,742 INFO L225 Difference]: With dead ends: 276 [2021-06-05 04:24:58,743 INFO L226 Difference]: Without dead ends: 276 [2021-06-05 04:24:58,743 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 235.0ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:24:58,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-06-05 04:24:58,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 206. [2021-06-05 04:24:58,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.7365853658536587) internal successors, (561), 205 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:58,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 561 transitions. [2021-06-05 04:24:58,746 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 561 transitions. Word has length 15 [2021-06-05 04:24:58,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:24:58,746 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 561 transitions. [2021-06-05 04:24:58,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:58,746 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 561 transitions. [2021-06-05 04:24:58,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:24:58,746 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:24:58,746 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:24:58,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable563,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:58,947 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:24:58,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:24:58,947 INFO L82 PathProgramCache]: Analyzing trace with hash 814015614, now seen corresponding path program 85 times [2021-06-05 04:24:58,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:24:58,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764489595] [2021-06-05 04:24:58,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:24:58,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:59,023 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:59,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:24:59,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764489595] [2021-06-05 04:24:59,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764489595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:59,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400416865] [2021-06-05 04:24:59,024 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:24:59,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:24:59,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:24:59,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:24:59,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:59,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:59,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:59,130 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:59,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:59,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:59,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:24:59,134 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:59,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:59,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:59,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:24:59,138 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:59,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:24:59,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:24:59,141 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:24:59,174 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:24:59,174 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:24:59,174 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:24:59,175 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:24:59,246 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:24:59,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400416865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:24:59,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:24:59,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:24:59,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105664102] [2021-06-05 04:24:59,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:24:59,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:24:59,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:24:59,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:24:59,247 INFO L87 Difference]: Start difference. First operand 206 states and 561 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:59,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:24:59,812 INFO L93 Difference]: Finished difference Result 287 states and 687 transitions. [2021-06-05 04:24:59,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:24:59,812 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:24:59,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:24:59,813 INFO L225 Difference]: With dead ends: 287 [2021-06-05 04:24:59,813 INFO L226 Difference]: Without dead ends: 279 [2021-06-05 04:24:59,813 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 571.4ms TimeCoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:24:59,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-06-05 04:24:59,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 210. [2021-06-05 04:24:59,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.736842105263158) internal successors, (572), 209 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:59,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 572 transitions. [2021-06-05 04:24:59,817 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 572 transitions. Word has length 15 [2021-06-05 04:24:59,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:24:59,818 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 572 transitions. [2021-06-05 04:24:59,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:24:59,818 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 572 transitions. [2021-06-05 04:24:59,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:24:59,818 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:24:59,818 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:25:00,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable567,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:00,033 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:25:00,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:25:00,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1762607976, now seen corresponding path program 86 times [2021-06-05 04:25:00,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:25:00,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430442182] [2021-06-05 04:25:00,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:25:00,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:25:00,107 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:00,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:25:00,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430442182] [2021-06-05 04:25:00,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430442182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:00,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880951172] [2021-06-05 04:25:00,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:00,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:25:00,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:25:00,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:25:00,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:25:00,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:00,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:00,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:25:00,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:00,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:00,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:00,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:25:00,221 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:00,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:00,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:00,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:25:00,228 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:00,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:00,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:25:00,231 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:00,264 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:25:00,264 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:25:00,265 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:25:00,265 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:25:00,310 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:00,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880951172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:00,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:25:00,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:25:00,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204476432] [2021-06-05 04:25:00,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:25:00,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:25:00,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:25:00,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:25:00,311 INFO L87 Difference]: Start difference. First operand 210 states and 572 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:00,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:25:00,715 INFO L93 Difference]: Finished difference Result 285 states and 714 transitions. [2021-06-05 04:25:00,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:25:00,716 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:25:00,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:25:00,717 INFO L225 Difference]: With dead ends: 285 [2021-06-05 04:25:00,717 INFO L226 Difference]: Without dead ends: 285 [2021-06-05 04:25:00,717 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 409.9ms TimeCoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:25:00,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-06-05 04:25:00,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 221. [2021-06-05 04:25:00,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.768181818181818) internal successors, (609), 220 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:00,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 609 transitions. [2021-06-05 04:25:00,721 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 609 transitions. Word has length 15 [2021-06-05 04:25:00,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:25:00,721 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 609 transitions. [2021-06-05 04:25:00,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:00,721 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 609 transitions. [2021-06-05 04:25:00,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:25:00,722 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:25:00,722 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:25:00,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable572,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:00,929 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:25:00,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:25:00,929 INFO L82 PathProgramCache]: Analyzing trace with hash 821746012, now seen corresponding path program 87 times [2021-06-05 04:25:00,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:25:00,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579825120] [2021-06-05 04:25:00,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:25:00,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:25:01,009 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:01,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:25:01,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579825120] [2021-06-05 04:25:01,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579825120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:01,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243402999] [2021-06-05 04:25:01,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:01,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:25:01,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:25:01,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:25:01,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:25:01,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:01,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:01,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:25:01,144 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:01,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:01,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:25:01,147 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:01,169 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:25:01,169 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:25:01,170 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:25:01,170 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:25:01,188 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:01,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243402999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:01,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:25:01,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:25:01,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873322194] [2021-06-05 04:25:01,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:25:01,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:25:01,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:25:01,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:25:01,189 INFO L87 Difference]: Start difference. First operand 221 states and 609 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:01,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:25:01,616 INFO L93 Difference]: Finished difference Result 317 states and 763 transitions. [2021-06-05 04:25:01,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:25:01,617 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:25:01,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:25:01,617 INFO L225 Difference]: With dead ends: 317 [2021-06-05 04:25:01,618 INFO L226 Difference]: Without dead ends: 317 [2021-06-05 04:25:01,618 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 379.3ms TimeCoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:25:01,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-06-05 04:25:01,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 216. [2021-06-05 04:25:01,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.744186046511628) internal successors, (590), 215 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:01,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 590 transitions. [2021-06-05 04:25:01,621 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 590 transitions. Word has length 15 [2021-06-05 04:25:01,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:25:01,621 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 590 transitions. [2021-06-05 04:25:01,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:01,621 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 590 transitions. [2021-06-05 04:25:01,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:25:01,622 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:25:01,622 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:25:01,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable576 [2021-06-05 04:25:01,825 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:25:01,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:25:01,825 INFO L82 PathProgramCache]: Analyzing trace with hash -667658984, now seen corresponding path program 88 times [2021-06-05 04:25:01,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:25:01,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586153172] [2021-06-05 04:25:01,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:25:01,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:25:01,884 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:01,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:25:01,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586153172] [2021-06-05 04:25:01,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586153172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:01,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236522449] [2021-06-05 04:25:01,884 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:01,912 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:25:01,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:25:01,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:25:01,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:25:02,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:02,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:02,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:25:02,042 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:02,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:02,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:25:02,045 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:02,067 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:25:02,067 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:25:02,071 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:25:02,071 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:25:02,090 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:02,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236522449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:02,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:25:02,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:25:02,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831442176] [2021-06-05 04:25:02,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:25:02,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:25:02,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:25:02,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:25:02,091 INFO L87 Difference]: Start difference. First operand 216 states and 590 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:02,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:25:02,266 INFO L93 Difference]: Finished difference Result 282 states and 694 transitions. [2021-06-05 04:25:02,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:25:02,266 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:25:02,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:25:02,267 INFO L225 Difference]: With dead ends: 282 [2021-06-05 04:25:02,267 INFO L226 Difference]: Without dead ends: 282 [2021-06-05 04:25:02,267 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 133.7ms TimeCoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:25:02,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-06-05 04:25:02,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 216. [2021-06-05 04:25:02,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.744186046511628) internal successors, (590), 215 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:02,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 590 transitions. [2021-06-05 04:25:02,271 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 590 transitions. Word has length 15 [2021-06-05 04:25:02,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:25:02,271 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 590 transitions. [2021-06-05 04:25:02,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:02,271 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 590 transitions. [2021-06-05 04:25:02,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:25:02,272 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:25:02,272 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:25:02,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable579,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:02,495 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:25:02,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:25:02,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1814621922, now seen corresponding path program 89 times [2021-06-05 04:25:02,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:25:02,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427135078] [2021-06-05 04:25:02,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:25:02,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:25:02,575 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:02,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:25:02,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427135078] [2021-06-05 04:25:02,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427135078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:02,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914429615] [2021-06-05 04:25:02,575 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:02,609 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:25:02,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:25:02,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:25:02,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:25:02,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:02,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:25:02,684 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:02,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:25:02,687 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:02,701 INFO L628 ElimStorePlain]: treesize reduction 27, result has 30.8 percent of original size [2021-06-05 04:25:02,701 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:25:02,702 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:25:02,702 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:12 [2021-06-05 04:25:02,719 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:02,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914429615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:02,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:25:02,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:25:02,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004051668] [2021-06-05 04:25:02,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:25:02,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:25:02,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:25:02,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:25:02,720 INFO L87 Difference]: Start difference. First operand 216 states and 590 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:02,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:25:02,844 INFO L93 Difference]: Finished difference Result 285 states and 751 transitions. [2021-06-05 04:25:02,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:25:02,844 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:25:02,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:25:02,845 INFO L225 Difference]: With dead ends: 285 [2021-06-05 04:25:02,845 INFO L226 Difference]: Without dead ends: 285 [2021-06-05 04:25:02,845 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 143.4ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:25:02,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-06-05 04:25:02,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 215. [2021-06-05 04:25:02,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.7523364485981308) internal successors, (589), 214 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:02,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 589 transitions. [2021-06-05 04:25:02,848 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 589 transitions. Word has length 15 [2021-06-05 04:25:02,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:25:02,848 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 589 transitions. [2021-06-05 04:25:02,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:02,848 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 589 transitions. [2021-06-05 04:25:02,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:25:02,848 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:25:02,848 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:25:03,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable582,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:03,049 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:25:03,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:25:03,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1256099514, now seen corresponding path program 90 times [2021-06-05 04:25:03,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:25:03,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236361105] [2021-06-05 04:25:03,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:25:03,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:25:03,119 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:03,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:25:03,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236361105] [2021-06-05 04:25:03,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236361105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:03,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496022588] [2021-06-05 04:25:03,119 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:03,164 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:25:03,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:25:03,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:25:03,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:25:03,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:03,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:25:03,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:03,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:25:03,273 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:03,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:03,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:25:03,278 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:03,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:25:03,282 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:03,284 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:25:03,285 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:03,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:25:03,288 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:03,318 INFO L628 ElimStorePlain]: treesize reduction 26, result has 43.5 percent of original size [2021-06-05 04:25:03,318 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:25:03,319 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:25:03,319 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:107, output treesize:20 [2021-06-05 04:25:03,352 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:03,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496022588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:03,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:25:03,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:25:03,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265797269] [2021-06-05 04:25:03,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:25:03,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:25:03,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:25:03,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:25:03,353 INFO L87 Difference]: Start difference. First operand 215 states and 589 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:03,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:25:03,612 INFO L93 Difference]: Finished difference Result 282 states and 741 transitions. [2021-06-05 04:25:03,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:25:03,612 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:25:03,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:25:03,612 INFO L225 Difference]: With dead ends: 282 [2021-06-05 04:25:03,613 INFO L226 Difference]: Without dead ends: 278 [2021-06-05 04:25:03,613 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 307.0ms TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:25:03,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-06-05 04:25:03,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 215. [2021-06-05 04:25:03,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.7476635514018692) internal successors, (588), 214 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:03,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 588 transitions. [2021-06-05 04:25:03,616 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 588 transitions. Word has length 15 [2021-06-05 04:25:03,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:25:03,616 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 588 transitions. [2021-06-05 04:25:03,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:03,616 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 588 transitions. [2021-06-05 04:25:03,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:25:03,617 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:25:03,617 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:25:03,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable584,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:03,825 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:25:03,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:25:03,825 INFO L82 PathProgramCache]: Analyzing trace with hash 237280192, now seen corresponding path program 91 times [2021-06-05 04:25:03,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:25:03,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495136811] [2021-06-05 04:25:03,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:25:03,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:25:03,908 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:03,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:25:03,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495136811] [2021-06-05 04:25:03,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495136811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:03,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860613920] [2021-06-05 04:25:03,909 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:03,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:25:03,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:25:03,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:25:04,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:04,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:04,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:25:04,057 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:04,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:04,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:25:04,060 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:04,082 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:25:04,082 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:25:04,083 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:25:04,083 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:25:04,101 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:04,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860613920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:04,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:25:04,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:25:04,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545298300] [2021-06-05 04:25:04,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:25:04,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:25:04,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:25:04,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:25:04,102 INFO L87 Difference]: Start difference. First operand 215 states and 588 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:04,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:25:04,195 INFO L93 Difference]: Finished difference Result 286 states and 753 transitions. [2021-06-05 04:25:04,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:25:04,195 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:25:04,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:25:04,196 INFO L225 Difference]: With dead ends: 286 [2021-06-05 04:25:04,196 INFO L226 Difference]: Without dead ends: 286 [2021-06-05 04:25:04,196 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 137.3ms TimeCoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:25:04,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-06-05 04:25:04,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 216. [2021-06-05 04:25:04,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.7488372093023257) internal successors, (591), 215 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:04,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 591 transitions. [2021-06-05 04:25:04,200 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 591 transitions. Word has length 15 [2021-06-05 04:25:04,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:25:04,200 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 591 transitions. [2021-06-05 04:25:04,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:04,200 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 591 transitions. [2021-06-05 04:25:04,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:25:04,200 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:25:04,200 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:25:04,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable591,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:04,409 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:25:04,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:25:04,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1791329316, now seen corresponding path program 92 times [2021-06-05 04:25:04,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:25:04,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642224658] [2021-06-05 04:25:04,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:25:04,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:25:04,484 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:04,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:25:04,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642224658] [2021-06-05 04:25:04,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642224658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:04,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562356237] [2021-06-05 04:25:04,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:04,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:25:04,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:25:04,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:25:04,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:25:04,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:25:04,674 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:04,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:04,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:04,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:25:04,678 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:04,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:25:04,681 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:04,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:25:04,685 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:04,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:04,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:04,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:25:04,689 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:04,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:25:04,691 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:04,722 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-05 04:25:04,722 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:25:04,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:25:04,723 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-05 04:25:04,750 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:04,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562356237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:04,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:25:04,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:25:04,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015494102] [2021-06-05 04:25:04,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:25:04,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:25:04,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:25:04,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:25:04,751 INFO L87 Difference]: Start difference. First operand 216 states and 591 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:05,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:25:05,093 INFO L93 Difference]: Finished difference Result 284 states and 745 transitions. [2021-06-05 04:25:05,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:25:05,094 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:25:05,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:25:05,094 INFO L225 Difference]: With dead ends: 284 [2021-06-05 04:25:05,094 INFO L226 Difference]: Without dead ends: 281 [2021-06-05 04:25:05,095 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 391.9ms TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:25:05,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-06-05 04:25:05,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 216. [2021-06-05 04:25:05,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.744186046511628) internal successors, (590), 215 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:05,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 590 transitions. [2021-06-05 04:25:05,098 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 590 transitions. Word has length 15 [2021-06-05 04:25:05,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:25:05,098 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 590 transitions. [2021-06-05 04:25:05,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:05,098 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 590 transitions. [2021-06-05 04:25:05,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:25:05,099 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:25:05,099 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:25:05,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable594 [2021-06-05 04:25:05,313 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:25:05,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:25:05,313 INFO L82 PathProgramCache]: Analyzing trace with hash 476922530, now seen corresponding path program 93 times [2021-06-05 04:25:05,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:25:05,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238920432] [2021-06-05 04:25:05,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:25:05,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:25:05,380 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:05,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:25:05,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238920432] [2021-06-05 04:25:05,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238920432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:05,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319823478] [2021-06-05 04:25:05,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:05,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:25:05,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:25:05,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:25:05,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:25:05,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:05,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:05,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:25:05,515 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:05,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:05,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:25:05,519 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:05,541 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:25:05,541 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:25:05,542 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:25:05,542 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:25:05,560 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:05,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319823478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:05,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:25:05,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:25:05,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765187775] [2021-06-05 04:25:05,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:25:05,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:25:05,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:25:05,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:25:05,561 INFO L87 Difference]: Start difference. First operand 216 states and 590 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:05,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:25:05,845 INFO L93 Difference]: Finished difference Result 301 states and 783 transitions. [2021-06-05 04:25:05,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:25:05,845 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:25:05,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:25:05,846 INFO L225 Difference]: With dead ends: 301 [2021-06-05 04:25:05,846 INFO L226 Difference]: Without dead ends: 301 [2021-06-05 04:25:05,846 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 262.4ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:25:05,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-06-05 04:25:05,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 219. [2021-06-05 04:25:05,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.7477064220183487) internal successors, (599), 218 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:05,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 599 transitions. [2021-06-05 04:25:05,850 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 599 transitions. Word has length 15 [2021-06-05 04:25:05,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:25:05,850 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 599 transitions. [2021-06-05 04:25:05,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:05,850 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 599 transitions. [2021-06-05 04:25:05,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:25:05,851 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:25:05,851 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:25:06,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable601 [2021-06-05 04:25:06,069 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:25:06,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:25:06,069 INFO L82 PathProgramCache]: Analyzing trace with hash -442778178, now seen corresponding path program 94 times [2021-06-05 04:25:06,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:25:06,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466986986] [2021-06-05 04:25:06,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:25:06,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:25:06,136 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:06,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:25:06,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466986986] [2021-06-05 04:25:06,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466986986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:06,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913040676] [2021-06-05 04:25:06,136 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:06,161 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:25:06,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:25:06,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:25:06,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:25:06,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:25:06,302 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:06,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:06,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:06,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:25:06,307 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:06,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:25:06,310 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:06,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:25:06,313 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:06,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:06,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:06,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:25:06,317 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:06,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:25:06,320 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:06,350 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-05 04:25:06,351 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:25:06,352 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:25:06,352 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-05 04:25:06,381 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:06,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913040676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:06,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:25:06,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:25:06,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307202419] [2021-06-05 04:25:06,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:25:06,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:25:06,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:25:06,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:25:06,382 INFO L87 Difference]: Start difference. First operand 219 states and 599 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:06,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:25:06,731 INFO L93 Difference]: Finished difference Result 292 states and 762 transitions. [2021-06-05 04:25:06,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:25:06,731 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:25:06,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:25:06,732 INFO L225 Difference]: With dead ends: 292 [2021-06-05 04:25:06,732 INFO L226 Difference]: Without dead ends: 290 [2021-06-05 04:25:06,732 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 356.9ms TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:25:06,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-06-05 04:25:06,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 221. [2021-06-05 04:25:06,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.7454545454545456) internal successors, (604), 220 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:06,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 604 transitions. [2021-06-05 04:25:06,735 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 604 transitions. Word has length 15 [2021-06-05 04:25:06,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:25:06,735 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 604 transitions. [2021-06-05 04:25:06,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:06,735 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 604 transitions. [2021-06-05 04:25:06,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:25:06,736 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:25:06,736 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:25:06,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable604,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:06,936 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:25:06,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:25:06,936 INFO L82 PathProgramCache]: Analyzing trace with hash 484652928, now seen corresponding path program 95 times [2021-06-05 04:25:06,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:25:06,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777312376] [2021-06-05 04:25:06,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:25:06,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:25:07,011 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:07,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:25:07,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777312376] [2021-06-05 04:25:07,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777312376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:07,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387059901] [2021-06-05 04:25:07,011 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:07,037 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:25:07,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:25:07,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:25:07,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:25:07,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:07,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:07,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:25:07,117 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:07,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:07,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:07,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:25:07,121 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:07,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:07,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:07,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:25:07,124 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:07,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:07,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:25:07,127 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:07,161 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:25:07,161 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:25:07,162 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:25:07,162 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:25:07,216 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:07,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387059901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:07,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:25:07,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:25:07,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589102365] [2021-06-05 04:25:07,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:25:07,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:25:07,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:25:07,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:25:07,216 INFO L87 Difference]: Start difference. First operand 221 states and 604 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:07,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:25:07,645 INFO L93 Difference]: Finished difference Result 359 states and 870 transitions. [2021-06-05 04:25:07,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:25:07,645 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:25:07,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:25:07,646 INFO L225 Difference]: With dead ends: 359 [2021-06-05 04:25:07,646 INFO L226 Difference]: Without dead ends: 359 [2021-06-05 04:25:07,646 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 410.9ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:25:07,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-06-05 04:25:07,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 224. [2021-06-05 04:25:07,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.7623318385650224) internal successors, (616), 223 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:07,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 616 transitions. [2021-06-05 04:25:07,649 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 616 transitions. Word has length 15 [2021-06-05 04:25:07,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:25:07,649 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 616 transitions. [2021-06-05 04:25:07,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:07,649 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 616 transitions. [2021-06-05 04:25:07,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:25:07,649 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:25:07,649 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:25:07,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable611 [2021-06-05 04:25:07,850 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:25:07,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:25:07,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1286269156, now seen corresponding path program 96 times [2021-06-05 04:25:07,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:25:07,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267718246] [2021-06-05 04:25:07,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:25:07,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:25:07,936 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:07,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:25:07,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267718246] [2021-06-05 04:25:07,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267718246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:07,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818280543] [2021-06-05 04:25:07,937 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:07,967 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:25:07,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:25:07,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:25:07,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:25:08,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:08,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:08,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:25:08,050 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:08,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:08,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:08,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:25:08,054 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:08,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:08,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:08,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:25:08,057 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:08,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:08,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:25:08,060 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:08,094 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:25:08,094 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:25:08,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:25:08,094 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:25:08,155 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:08,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818280543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:08,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:25:08,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:25:08,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130711532] [2021-06-05 04:25:08,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:25:08,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:25:08,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:25:08,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:25:08,156 INFO L87 Difference]: Start difference. First operand 224 states and 616 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:08,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:25:08,707 INFO L93 Difference]: Finished difference Result 325 states and 819 transitions. [2021-06-05 04:25:08,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:25:08,707 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:25:08,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:25:08,708 INFO L225 Difference]: With dead ends: 325 [2021-06-05 04:25:08,708 INFO L226 Difference]: Without dead ends: 322 [2021-06-05 04:25:08,708 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 576.6ms TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:25:08,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-06-05 04:25:08,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 226. [2021-06-05 04:25:08,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.7644444444444445) internal successors, (622), 225 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:08,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 622 transitions. [2021-06-05 04:25:08,711 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 622 transitions. Word has length 15 [2021-06-05 04:25:08,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:25:08,711 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 622 transitions. [2021-06-05 04:25:08,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:08,711 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 622 transitions. [2021-06-05 04:25:08,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:25:08,711 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:25:08,711 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:25:08,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable615,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:08,912 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:25:08,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:25:08,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1290354434, now seen corresponding path program 97 times [2021-06-05 04:25:08,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:25:08,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55801003] [2021-06-05 04:25:08,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:25:08,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:25:08,998 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:08,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:25:08,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55801003] [2021-06-05 04:25:08,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55801003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:08,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887258850] [2021-06-05 04:25:08,999 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:09,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:25:09,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:25:09,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:25:09,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:09,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:09,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:25:09,129 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:09,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:09,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:09,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:25:09,133 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:09,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:09,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:09,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:25:09,138 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:09,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:09,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:25:09,141 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:09,182 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:25:09,182 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:25:09,183 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:25:09,183 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:25:09,240 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:09,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887258850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:09,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:25:09,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:25:09,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12140646] [2021-06-05 04:25:09,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:25:09,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:25:09,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:25:09,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:25:09,241 INFO L87 Difference]: Start difference. First operand 226 states and 622 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:09,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:25:09,557 INFO L93 Difference]: Finished difference Result 314 states and 803 transitions. [2021-06-05 04:25:09,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:25:09,557 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:25:09,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:25:09,558 INFO L225 Difference]: With dead ends: 314 [2021-06-05 04:25:09,558 INFO L226 Difference]: Without dead ends: 314 [2021-06-05 04:25:09,558 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 352.4ms TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:25:09,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-06-05 04:25:09,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 223. [2021-06-05 04:25:09,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.7522522522522523) internal successors, (611), 222 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:09,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 611 transitions. [2021-06-05 04:25:09,560 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 611 transitions. Word has length 15 [2021-06-05 04:25:09,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:25:09,560 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 611 transitions. [2021-06-05 04:25:09,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:09,561 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 611 transitions. [2021-06-05 04:25:09,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:25:09,561 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:25:09,561 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:25:09,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable621 [2021-06-05 04:25:09,762 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:25:09,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:25:09,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1950902984, now seen corresponding path program 98 times [2021-06-05 04:25:09,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:25:09,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4125218] [2021-06-05 04:25:09,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:25:09,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:25:09,823 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:09,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:25:09,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4125218] [2021-06-05 04:25:09,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4125218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:09,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618909102] [2021-06-05 04:25:09,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:09,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:25:09,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:25:09,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:25:09,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:25:09,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:09,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:09,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:25:09,945 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:09,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:09,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:25:09,948 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:09,970 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:25:09,970 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:25:09,971 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:25:09,971 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:25:09,989 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:09,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618909102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:09,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:25:09,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:25:09,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275189406] [2021-06-05 04:25:09,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:25:09,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:25:09,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:25:09,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:25:09,990 INFO L87 Difference]: Start difference. First operand 223 states and 611 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:10,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:25:10,108 INFO L93 Difference]: Finished difference Result 269 states and 706 transitions. [2021-06-05 04:25:10,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:25:10,109 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:25:10,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:25:10,109 INFO L225 Difference]: With dead ends: 269 [2021-06-05 04:25:10,109 INFO L226 Difference]: Without dead ends: 269 [2021-06-05 04:25:10,109 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 121.7ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:25:10,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-06-05 04:25:10,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 228. [2021-06-05 04:25:10,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.748898678414097) internal successors, (624), 227 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:10,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 624 transitions. [2021-06-05 04:25:10,112 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 624 transitions. Word has length 15 [2021-06-05 04:25:10,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:25:10,112 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 624 transitions. [2021-06-05 04:25:10,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:10,112 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 624 transitions. [2021-06-05 04:25:10,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:25:10,112 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:25:10,112 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:25:10,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable625,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:10,313 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:25:10,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:25:10,313 INFO L82 PathProgramCache]: Analyzing trace with hash -396853860, now seen corresponding path program 99 times [2021-06-05 04:25:10,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:25:10,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363880969] [2021-06-05 04:25:10,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:25:10,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:25:10,383 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:10,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:25:10,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363880969] [2021-06-05 04:25:10,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363880969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:10,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184264428] [2021-06-05 04:25:10,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:10,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:25:10,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:25:10,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:25:10,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:25:10,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:25:10,526 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:10,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:10,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:10,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:25:10,530 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:10,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:25:10,533 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:10,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:25:10,536 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:10,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:10,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:10,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:25:10,540 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:10,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:25:10,543 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:10,573 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-05 04:25:10,573 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:25:10,574 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:25:10,574 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-05 04:25:10,599 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:10,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184264428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:10,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:25:10,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:25:10,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038768342] [2021-06-05 04:25:10,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:25:10,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:25:10,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:25:10,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:25:10,600 INFO L87 Difference]: Start difference. First operand 228 states and 624 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:10,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:25:10,831 INFO L93 Difference]: Finished difference Result 261 states and 683 transitions. [2021-06-05 04:25:10,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:25:10,831 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:25:10,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:25:10,832 INFO L225 Difference]: With dead ends: 261 [2021-06-05 04:25:10,832 INFO L226 Difference]: Without dead ends: 258 [2021-06-05 04:25:10,832 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 260.0ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:25:10,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-06-05 04:25:10,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 229. [2021-06-05 04:25:10,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.736842105263158) internal successors, (624), 228 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:10,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 624 transitions. [2021-06-05 04:25:10,834 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 624 transitions. Word has length 15 [2021-06-05 04:25:10,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:25:10,834 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 624 transitions. [2021-06-05 04:25:10,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:10,835 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 624 transitions. [2021-06-05 04:25:10,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:25:10,835 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:25:10,835 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:25:11,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable628 [2021-06-05 04:25:11,035 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:25:11,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:25:11,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1711260646, now seen corresponding path program 100 times [2021-06-05 04:25:11,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:25:11,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894750873] [2021-06-05 04:25:11,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:25:11,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:25:11,106 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:11,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:25:11,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894750873] [2021-06-05 04:25:11,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894750873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:11,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108871544] [2021-06-05 04:25:11,107 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:11,140 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:25:11,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:25:11,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:25:11,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:25:11,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:11,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:11,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:25:11,272 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:11,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:11,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:25:11,275 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:11,298 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:25:11,298 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:25:11,299 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:25:11,299 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:25:11,317 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:11,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108871544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:11,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:25:11,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:25:11,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116297055] [2021-06-05 04:25:11,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:25:11,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:25:11,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:25:11,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:25:11,318 INFO L87 Difference]: Start difference. First operand 229 states and 624 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:11,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:25:11,578 INFO L93 Difference]: Finished difference Result 268 states and 706 transitions. [2021-06-05 04:25:11,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:25:11,580 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:25:11,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:25:11,581 INFO L225 Difference]: With dead ends: 268 [2021-06-05 04:25:11,581 INFO L226 Difference]: Without dead ends: 268 [2021-06-05 04:25:11,581 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 279.4ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:25:11,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-06-05 04:25:11,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 228. [2021-06-05 04:25:11,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.753303964757709) internal successors, (625), 227 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:11,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 625 transitions. [2021-06-05 04:25:11,584 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 625 transitions. Word has length 15 [2021-06-05 04:25:11,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:25:11,584 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 625 transitions. [2021-06-05 04:25:11,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:11,584 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 625 transitions. [2021-06-05 04:25:11,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:25:11,585 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:25:11,585 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:25:11,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable635 [2021-06-05 04:25:11,785 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:25:11,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:25:11,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1664005942, now seen corresponding path program 101 times [2021-06-05 04:25:11,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:25:11,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97815946] [2021-06-05 04:25:11,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:25:11,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:25:11,868 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:11,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:25:11,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97815946] [2021-06-05 04:25:11,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97815946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:11,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749944258] [2021-06-05 04:25:11,868 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:11,894 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:25:11,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:25:11,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:25:11,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:25:12,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:25:12,015 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:12,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:12,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:12,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:25:12,019 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:12,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:25:12,023 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:12,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:25:12,026 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:12,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:12,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:12,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:25:12,030 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:12,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:25:12,033 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:12,064 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-05 04:25:12,064 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:25:12,065 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:25:12,065 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-05 04:25:12,091 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:12,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749944258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:12,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:25:12,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:25:12,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797361055] [2021-06-05 04:25:12,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:25:12,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:25:12,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:25:12,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:25:12,092 INFO L87 Difference]: Start difference. First operand 228 states and 625 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:12,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:25:12,281 INFO L93 Difference]: Finished difference Result 256 states and 681 transitions. [2021-06-05 04:25:12,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:25:12,282 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:25:12,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:25:12,282 INFO L225 Difference]: With dead ends: 256 [2021-06-05 04:25:12,282 INFO L226 Difference]: Without dead ends: 254 [2021-06-05 04:25:12,282 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 239.6ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:25:12,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-06-05 04:25:12,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 229. [2021-06-05 04:25:12,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.75) internal successors, (627), 228 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:12,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 627 transitions. [2021-06-05 04:25:12,285 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 627 transitions. Word has length 15 [2021-06-05 04:25:12,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:25:12,285 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 627 transitions. [2021-06-05 04:25:12,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:12,285 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 627 transitions. [2021-06-05 04:25:12,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:25:12,285 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:25:12,285 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:25:12,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable638,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:12,486 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:25:12,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:25:12,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1703530248, now seen corresponding path program 102 times [2021-06-05 04:25:12,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:25:12,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031674162] [2021-06-05 04:25:12,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:25:12,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:25:12,559 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:12,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:25:12,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031674162] [2021-06-05 04:25:12,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031674162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:12,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426483211] [2021-06-05 04:25:12,559 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:12,589 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:25:12,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:25:12,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:25:12,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:25:12,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:12,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:12,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:25:12,661 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:12,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:12,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:12,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:25:12,665 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:12,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:12,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:12,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:25:12,669 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:12,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:12,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:25:12,672 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:12,706 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:25:12,706 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:25:12,707 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:25:12,707 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:25:12,753 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:12,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426483211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:12,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:25:12,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:25:12,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73387046] [2021-06-05 04:25:12,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:25:12,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:25:12,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:25:12,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:25:12,754 INFO L87 Difference]: Start difference. First operand 229 states and 627 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:13,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:25:13,099 INFO L93 Difference]: Finished difference Result 326 states and 793 transitions. [2021-06-05 04:25:13,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:25:13,099 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:25:13,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:25:13,100 INFO L225 Difference]: With dead ends: 326 [2021-06-05 04:25:13,100 INFO L226 Difference]: Without dead ends: 326 [2021-06-05 04:25:13,100 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 319.6ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:25:13,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-06-05 04:25:13,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 229. [2021-06-05 04:25:13,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.754385964912281) internal successors, (628), 228 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:13,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 628 transitions. [2021-06-05 04:25:13,103 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 628 transitions. Word has length 15 [2021-06-05 04:25:13,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:25:13,103 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 628 transitions. [2021-06-05 04:25:13,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:13,103 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 628 transitions. [2021-06-05 04:25:13,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:25:13,103 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:25:13,103 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:25:13,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable645,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:13,304 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:25:13,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:25:13,304 INFO L82 PathProgramCache]: Analyzing trace with hash -901914020, now seen corresponding path program 103 times [2021-06-05 04:25:13,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:25:13,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499585475] [2021-06-05 04:25:13,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:25:13,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:25:13,379 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:13,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:25:13,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499585475] [2021-06-05 04:25:13,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499585475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:13,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772300310] [2021-06-05 04:25:13,380 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:13,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:25:13,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:25:13,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:25:13,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:13,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:13,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:25:13,520 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:13,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:13,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:13,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:25:13,524 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:13,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:13,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:13,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:25:13,528 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:13,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:13,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:25:13,531 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:13,564 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:25:13,564 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:25:13,565 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:25:13,565 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:25:13,626 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:13,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772300310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:13,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:25:13,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:25:13,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166375239] [2021-06-05 04:25:13,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:25:13,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:25:13,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:25:13,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:25:13,627 INFO L87 Difference]: Start difference. First operand 229 states and 628 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:13,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:25:13,946 INFO L93 Difference]: Finished difference Result 288 states and 732 transitions. [2021-06-05 04:25:13,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:25:13,946 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:25:13,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:25:13,947 INFO L225 Difference]: With dead ends: 288 [2021-06-05 04:25:13,947 INFO L226 Difference]: Without dead ends: 285 [2021-06-05 04:25:13,947 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 344.0ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:25:13,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-06-05 04:25:13,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 233. [2021-06-05 04:25:13,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.7629310344827585) internal successors, (641), 232 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:13,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 641 transitions. [2021-06-05 04:25:13,949 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 641 transitions. Word has length 15 [2021-06-05 04:25:13,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:25:13,950 INFO L482 AbstractCegarLoop]: Abstraction has 233 states and 641 transitions. [2021-06-05 04:25:13,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:13,950 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 641 transitions. [2021-06-05 04:25:13,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:25:13,950 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:25:13,950 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:25:14,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable649,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:14,151 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:25:14,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:25:14,151 INFO L82 PathProgramCache]: Analyzing trace with hash 816429686, now seen corresponding path program 104 times [2021-06-05 04:25:14,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:25:14,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128538307] [2021-06-05 04:25:14,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:25:14,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:25:14,222 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:14,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:25:14,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128538307] [2021-06-05 04:25:14,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128538307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:14,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710389919] [2021-06-05 04:25:14,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:14,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:25:14,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:25:14,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:25:14,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:25:14,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:14,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:14,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:25:14,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:14,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:14,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:14,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:25:14,324 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:14,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:14,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:14,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:25:14,327 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:14,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:14,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:25:14,331 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:14,364 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:25:14,364 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:25:14,365 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:25:14,365 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:25:14,432 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:14,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710389919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:14,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:25:14,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:25:14,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300498300] [2021-06-05 04:25:14,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:25:14,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:25:14,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:25:14,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:25:14,433 INFO L87 Difference]: Start difference. First operand 233 states and 641 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:14,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:25:14,684 INFO L93 Difference]: Finished difference Result 286 states and 730 transitions. [2021-06-05 04:25:14,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:25:14,684 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:25:14,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:25:14,685 INFO L225 Difference]: With dead ends: 286 [2021-06-05 04:25:14,685 INFO L226 Difference]: Without dead ends: 286 [2021-06-05 04:25:14,688 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 241.3ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:25:14,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-06-05 04:25:14,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 229. [2021-06-05 04:25:14,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.75) internal successors, (627), 228 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:14,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 627 transitions. [2021-06-05 04:25:14,691 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 627 transitions. Word has length 15 [2021-06-05 04:25:14,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:25:14,691 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 627 transitions. [2021-06-05 04:25:14,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:14,691 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 627 transitions. [2021-06-05 04:25:14,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:25:14,691 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:25:14,691 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:25:14,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable655,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:14,892 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:25:14,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:25:14,892 INFO L82 PathProgramCache]: Analyzing trace with hash -638175266, now seen corresponding path program 105 times [2021-06-05 04:25:14,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:25:14,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755329776] [2021-06-05 04:25:14,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:25:14,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:25:14,952 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:14,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:25:14,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755329776] [2021-06-05 04:25:14,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755329776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:14,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263696696] [2021-06-05 04:25:14,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:14,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:25:14,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:25:14,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:25:14,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:25:15,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:15,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:15,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:25:15,077 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:15,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:15,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:25:15,080 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:15,102 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:25:15,102 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:25:15,103 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:25:15,103 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:25:15,128 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:15,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263696696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:15,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:25:15,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:25:15,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871827378] [2021-06-05 04:25:15,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:25:15,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:25:15,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:25:15,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:25:15,129 INFO L87 Difference]: Start difference. First operand 229 states and 627 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:15,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:25:15,319 INFO L93 Difference]: Finished difference Result 290 states and 741 transitions. [2021-06-05 04:25:15,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:25:15,320 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:25:15,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:25:15,320 INFO L225 Difference]: With dead ends: 290 [2021-06-05 04:25:15,320 INFO L226 Difference]: Without dead ends: 290 [2021-06-05 04:25:15,320 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 170.1ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:25:15,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-06-05 04:25:15,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 229. [2021-06-05 04:25:15,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.75) internal successors, (627), 228 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:15,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 627 transitions. [2021-06-05 04:25:15,324 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 627 transitions. Word has length 15 [2021-06-05 04:25:15,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:25:15,324 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 627 transitions. [2021-06-05 04:25:15,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:15,324 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 627 transitions. [2021-06-05 04:25:15,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:25:15,324 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:25:15,324 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:25:15,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable659 [2021-06-05 04:25:15,537 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:25:15,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:25:15,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1557875974, now seen corresponding path program 106 times [2021-06-05 04:25:15,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:25:15,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991546376] [2021-06-05 04:25:15,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:25:15,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:25:15,595 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:15,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:25:15,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991546376] [2021-06-05 04:25:15,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991546376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:15,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932694763] [2021-06-05 04:25:15,595 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:15,621 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:25:15,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:25:15,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:25:15,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:25:15,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:25:15,726 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:15,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:15,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:15,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:25:15,730 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:15,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:25:15,733 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:15,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:25:15,736 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:15,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:15,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:15,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:25:15,740 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:15,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:25:15,743 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:15,773 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-05 04:25:15,774 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:25:15,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:25:15,775 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-05 04:25:15,800 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:15,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932694763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:15,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:25:15,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:25:15,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050547777] [2021-06-05 04:25:15,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:25:15,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:25:15,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:25:15,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:25:15,801 INFO L87 Difference]: Start difference. First operand 229 states and 627 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:16,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:25:16,211 INFO L93 Difference]: Finished difference Result 265 states and 692 transitions. [2021-06-05 04:25:16,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:25:16,211 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:25:16,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:25:16,212 INFO L225 Difference]: With dead ends: 265 [2021-06-05 04:25:16,212 INFO L226 Difference]: Without dead ends: 261 [2021-06-05 04:25:16,212 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 368.0ms TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:25:16,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-06-05 04:25:16,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 227. [2021-06-05 04:25:16,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.747787610619469) internal successors, (621), 226 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:16,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 621 transitions. [2021-06-05 04:25:16,215 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 621 transitions. Word has length 15 [2021-06-05 04:25:16,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:25:16,215 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 621 transitions. [2021-06-05 04:25:16,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:16,215 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 621 transitions. [2021-06-05 04:25:16,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:25:16,215 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:25:16,216 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:25:16,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable662 [2021-06-05 04:25:16,434 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:25:16,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:25:16,434 INFO L82 PathProgramCache]: Analyzing trace with hash 977076318, now seen corresponding path program 107 times [2021-06-05 04:25:16,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:25:16,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022871072] [2021-06-05 04:25:16,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:25:16,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:25:16,504 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:16,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:25:16,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022871072] [2021-06-05 04:25:16,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022871072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:16,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482640608] [2021-06-05 04:25:16,504 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:16,554 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:25:16,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:25:16,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:25:16,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:25:16,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:16,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:16,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:25:16,621 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:16,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:16,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:16,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:25:16,624 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:16,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:16,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:16,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:25:16,628 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:16,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:16,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:25:16,632 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:16,668 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:25:16,668 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:25:16,669 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:25:16,669 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:25:16,735 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:16,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482640608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:16,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:25:16,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:25:16,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839009720] [2021-06-05 04:25:16,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:25:16,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:25:16,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:25:16,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:25:16,736 INFO L87 Difference]: Start difference. First operand 227 states and 621 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:17,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:25:17,206 INFO L93 Difference]: Finished difference Result 283 states and 713 transitions. [2021-06-05 04:25:17,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:25:17,207 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:25:17,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:25:17,207 INFO L225 Difference]: With dead ends: 283 [2021-06-05 04:25:17,207 INFO L226 Difference]: Without dead ends: 279 [2021-06-05 04:25:17,207 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 453.6ms TimeCoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:25:17,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-06-05 04:25:17,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 227. [2021-06-05 04:25:17,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.7389380530973453) internal successors, (619), 226 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:17,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 619 transitions. [2021-06-05 04:25:17,210 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 619 transitions. Word has length 15 [2021-06-05 04:25:17,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:25:17,210 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 619 transitions. [2021-06-05 04:25:17,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:17,210 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 619 transitions. [2021-06-05 04:25:17,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:25:17,210 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:25:17,210 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:25:17,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable669 [2021-06-05 04:25:17,411 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:25:17,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:25:17,411 INFO L82 PathProgramCache]: Analyzing trace with hash -2119849864, now seen corresponding path program 108 times [2021-06-05 04:25:17,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:25:17,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888396370] [2021-06-05 04:25:17,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:25:17,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:25:17,482 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:17,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:25:17,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888396370] [2021-06-05 04:25:17,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888396370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:17,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712911966] [2021-06-05 04:25:17,483 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:17,508 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:25:17,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:25:17,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:25:17,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:25:17,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:17,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:17,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:25:17,578 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:17,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:17,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:17,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:25:17,583 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:17,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:17,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:17,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:25:17,587 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:17,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:17,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:25:17,591 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:17,636 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:25:17,636 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:25:17,637 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:25:17,637 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:25:17,683 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:17,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712911966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:17,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:25:17,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:25:17,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114108604] [2021-06-05 04:25:17,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:25:17,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:25:17,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:25:17,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:25:17,684 INFO L87 Difference]: Start difference. First operand 227 states and 619 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:18,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:25:18,028 INFO L93 Difference]: Finished difference Result 350 states and 828 transitions. [2021-06-05 04:25:18,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:25:18,029 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:25:18,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:25:18,029 INFO L225 Difference]: With dead ends: 350 [2021-06-05 04:25:18,029 INFO L226 Difference]: Without dead ends: 350 [2021-06-05 04:25:18,030 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 309.8ms TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:25:18,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-06-05 04:25:18,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 231. [2021-06-05 04:25:18,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 2.756521739130435) internal successors, (634), 230 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:18,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 634 transitions. [2021-06-05 04:25:18,032 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 634 transitions. Word has length 15 [2021-06-05 04:25:18,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:25:18,032 INFO L482 AbstractCegarLoop]: Abstraction has 231 states and 634 transitions. [2021-06-05 04:25:18,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:18,032 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 634 transitions. [2021-06-05 04:25:18,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:25:18,033 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:25:18,033 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:25:18,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable674 [2021-06-05 04:25:18,233 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:25:18,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:25:18,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1318233636, now seen corresponding path program 109 times [2021-06-05 04:25:18,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:25:18,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600139114] [2021-06-05 04:25:18,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:25:18,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:25:18,301 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:18,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:25:18,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600139114] [2021-06-05 04:25:18,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600139114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:18,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966644148] [2021-06-05 04:25:18,301 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:18,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:25:18,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:25:18,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:25:18,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:18,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:18,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:25:18,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:18,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:18,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:18,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:25:18,395 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:18,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:18,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:18,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:25:18,399 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:18,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:18,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:25:18,402 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:18,436 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:25:18,436 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:25:18,436 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:25:18,436 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:25:18,496 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:18,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966644148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:18,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:25:18,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:25:18,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383933421] [2021-06-05 04:25:18,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:25:18,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:25:18,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:25:18,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:25:18,497 INFO L87 Difference]: Start difference. First operand 231 states and 634 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:19,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:25:19,048 INFO L93 Difference]: Finished difference Result 340 states and 815 transitions. [2021-06-05 04:25:19,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 04:25:19,049 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:25:19,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:25:19,049 INFO L225 Difference]: With dead ends: 340 [2021-06-05 04:25:19,049 INFO L226 Difference]: Without dead ends: 332 [2021-06-05 04:25:19,049 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 508.0ms TimeCoverageRelationStatistics Valid=156, Invalid=900, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:25:19,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-06-05 04:25:19,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 236. [2021-06-05 04:25:19,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.753191489361702) internal successors, (647), 235 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:19,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 647 transitions. [2021-06-05 04:25:19,052 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 647 transitions. Word has length 15 [2021-06-05 04:25:19,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:25:19,052 INFO L482 AbstractCegarLoop]: Abstraction has 236 states and 647 transitions. [2021-06-05 04:25:19,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:19,052 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 647 transitions. [2021-06-05 04:25:19,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:25:19,053 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:25:19,053 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:25:19,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable678 [2021-06-05 04:25:19,253 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:25:19,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:25:19,254 INFO L82 PathProgramCache]: Analyzing trace with hash 400110070, now seen corresponding path program 110 times [2021-06-05 04:25:19,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:25:19,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164344571] [2021-06-05 04:25:19,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:25:19,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:25:19,321 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:19,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:25:19,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164344571] [2021-06-05 04:25:19,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164344571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:19,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092085237] [2021-06-05 04:25:19,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:19,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:25:19,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:25:19,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:25:19,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:25:19,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:19,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:19,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:25:19,410 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:19,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:19,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:19,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:25:19,413 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:19,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:19,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:19,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:25:19,417 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:19,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:19,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:25:19,420 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:19,453 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:25:19,453 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:25:19,454 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:25:19,454 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:25:19,500 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:19,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092085237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:19,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:25:19,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:25:19,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919736541] [2021-06-05 04:25:19,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:25:19,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:25:19,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:25:19,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:25:19,501 INFO L87 Difference]: Start difference. First operand 236 states and 647 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:19,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:25:19,887 INFO L93 Difference]: Finished difference Result 335 states and 813 transitions. [2021-06-05 04:25:19,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:25:19,888 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:25:19,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:25:19,888 INFO L225 Difference]: With dead ends: 335 [2021-06-05 04:25:19,888 INFO L226 Difference]: Without dead ends: 335 [2021-06-05 04:25:19,888 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 330.3ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:25:19,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-06-05 04:25:19,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 234. [2021-06-05 04:25:19,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.7381974248927037) internal successors, (638), 233 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:19,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 638 transitions. [2021-06-05 04:25:19,891 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 638 transitions. Word has length 15 [2021-06-05 04:25:19,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:25:19,891 INFO L482 AbstractCegarLoop]: Abstraction has 234 states and 638 transitions. [2021-06-05 04:25:19,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:19,891 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 638 transitions. [2021-06-05 04:25:19,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:25:19,891 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:25:19,891 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:25:20,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable684,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:20,092 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:25:20,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:25:20,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1310503238, now seen corresponding path program 111 times [2021-06-05 04:25:20,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:25:20,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748809870] [2021-06-05 04:25:20,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:25:20,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:25:20,164 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:20,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:25:20,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748809870] [2021-06-05 04:25:20,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748809870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:20,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576810205] [2021-06-05 04:25:20,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:20,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:25:20,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:25:20,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:25:20,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:25:20,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:20,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:20,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:25:20,268 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:20,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:20,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:25:20,271 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:20,289 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-06-05 04:25:20,289 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:25:20,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:25:20,290 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-06-05 04:25:20,310 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:20,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576810205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:20,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:25:20,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:25:20,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860224236] [2021-06-05 04:25:20,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:25:20,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:25:20,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:25:20,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:25:20,311 INFO L87 Difference]: Start difference. First operand 234 states and 638 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:20,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:25:20,506 INFO L93 Difference]: Finished difference Result 339 states and 822 transitions. [2021-06-05 04:25:20,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:25:20,506 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:25:20,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:25:20,507 INFO L225 Difference]: With dead ends: 339 [2021-06-05 04:25:20,507 INFO L226 Difference]: Without dead ends: 339 [2021-06-05 04:25:20,507 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 159.4ms TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:25:20,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-06-05 04:25:20,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 234. [2021-06-05 04:25:20,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.7381974248927037) internal successors, (638), 233 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:20,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 638 transitions. [2021-06-05 04:25:20,510 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 638 transitions. Word has length 15 [2021-06-05 04:25:20,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:25:20,510 INFO L482 AbstractCegarLoop]: Abstraction has 234 states and 638 transitions. [2021-06-05 04:25:20,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:20,510 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 638 transitions. [2021-06-05 04:25:20,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:25:20,510 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:25:20,510 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:25:20,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable688 [2021-06-05 04:25:20,711 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:25:20,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:25:20,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1065104704, now seen corresponding path program 112 times [2021-06-05 04:25:20,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:25:20,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127506296] [2021-06-05 04:25:20,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:25:20,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:25:20,769 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:20,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:25:20,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127506296] [2021-06-05 04:25:20,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127506296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:20,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108608310] [2021-06-05 04:25:20,769 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:20,793 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:25:20,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:25:20,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:25:20,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:25:20,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:20,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:20,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:25:20,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:20,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:20,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:25:20,911 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:20,932 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:25:20,932 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:25:20,933 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:25:20,933 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:25:20,952 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:20,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108608310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:20,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:25:20,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:25:20,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50840672] [2021-06-05 04:25:20,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:25:20,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:25:20,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:25:20,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:25:20,953 INFO L87 Difference]: Start difference. First operand 234 states and 638 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:21,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:25:21,122 INFO L93 Difference]: Finished difference Result 326 states and 807 transitions. [2021-06-05 04:25:21,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:25:21,123 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:25:21,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:25:21,123 INFO L225 Difference]: With dead ends: 326 [2021-06-05 04:25:21,123 INFO L226 Difference]: Without dead ends: 326 [2021-06-05 04:25:21,123 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 129.2ms TimeCoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:25:21,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-06-05 04:25:21,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 252. [2021-06-05 04:25:21,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.752988047808765) internal successors, (691), 251 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:21,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 691 transitions. [2021-06-05 04:25:21,126 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 691 transitions. Word has length 15 [2021-06-05 04:25:21,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:25:21,126 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 691 transitions. [2021-06-05 04:25:21,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:21,126 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 691 transitions. [2021-06-05 04:25:21,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:25:21,127 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:25:21,127 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:25:21,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable690,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:21,327 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:25:21,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:25:21,328 INFO L82 PathProgramCache]: Analyzing trace with hash 488944420, now seen corresponding path program 113 times [2021-06-05 04:25:21,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:25:21,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635977110] [2021-06-05 04:25:21,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:25:21,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:25:21,405 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:21,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:25:21,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635977110] [2021-06-05 04:25:21,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635977110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:21,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740247477] [2021-06-05 04:25:21,405 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:21,439 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:25:21,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:25:21,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:25:21,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:25:21,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:25:21,572 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:21,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:21,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:21,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:25:21,577 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:21,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:25:21,585 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:21,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:25:21,589 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:21,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:21,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:21,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:25:21,593 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:21,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:25:21,597 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:21,633 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-05 04:25:21,634 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:25:21,635 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:25:21,635 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-05 04:25:21,664 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:21,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740247477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:21,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:25:21,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:25:21,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466912776] [2021-06-05 04:25:21,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:25:21,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:25:21,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:25:21,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:25:21,665 INFO L87 Difference]: Start difference. First operand 252 states and 691 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:22,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:25:22,036 INFO L93 Difference]: Finished difference Result 306 states and 765 transitions. [2021-06-05 04:25:22,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:25:22,036 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:25:22,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:25:22,037 INFO L225 Difference]: With dead ends: 306 [2021-06-05 04:25:22,037 INFO L226 Difference]: Without dead ends: 303 [2021-06-05 04:25:22,037 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 351.6ms TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:25:22,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-06-05 04:25:22,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 255. [2021-06-05 04:25:22,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 2.736220472440945) internal successors, (695), 254 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:22,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 695 transitions. [2021-06-05 04:25:22,040 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 695 transitions. Word has length 15 [2021-06-05 04:25:22,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:25:22,040 INFO L482 AbstractCegarLoop]: Abstraction has 255 states and 695 transitions. [2021-06-05 04:25:22,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:22,041 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 695 transitions. [2021-06-05 04:25:22,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:25:22,041 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:25:22,041 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:25:22,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable693,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:22,257 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:25:22,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:25:22,257 INFO L82 PathProgramCache]: Analyzing trace with hash -825462366, now seen corresponding path program 114 times [2021-06-05 04:25:22,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:25:22,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926353161] [2021-06-05 04:25:22,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:25:22,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:25:22,320 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:22,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:25:22,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926353161] [2021-06-05 04:25:22,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926353161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:22,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065643818] [2021-06-05 04:25:22,320 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:22,346 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:25:22,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:25:22,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:25:22,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:25:22,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:22,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:22,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:25:22,478 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:22,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:22,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:25:22,482 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:22,503 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:25:22,503 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:25:22,505 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:25:22,505 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:25:22,523 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:22,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065643818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:22,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:25:22,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:25:22,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791596781] [2021-06-05 04:25:22,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:25:22,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:25:22,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:25:22,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:25:22,524 INFO L87 Difference]: Start difference. First operand 255 states and 695 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:22,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:25:22,922 INFO L93 Difference]: Finished difference Result 335 states and 825 transitions. [2021-06-05 04:25:22,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:25:22,923 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:25:22,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:25:22,923 INFO L225 Difference]: With dead ends: 335 [2021-06-05 04:25:22,923 INFO L226 Difference]: Without dead ends: 335 [2021-06-05 04:25:22,924 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 380.4ms TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:25:22,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-06-05 04:25:22,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 251. [2021-06-05 04:25:22,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 2.756) internal successors, (689), 250 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:22,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 689 transitions. [2021-06-05 04:25:22,927 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 689 transitions. Word has length 15 [2021-06-05 04:25:22,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:25:22,927 INFO L482 AbstractCegarLoop]: Abstraction has 251 states and 689 transitions. [2021-06-05 04:25:22,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:22,927 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 689 transitions. [2021-06-05 04:25:22,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:25:22,928 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:25:22,928 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:25:23,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable700 [2021-06-05 04:25:23,133 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:25:23,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:25:23,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1745163074, now seen corresponding path program 115 times [2021-06-05 04:25:23,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:25:23,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332578117] [2021-06-05 04:25:23,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:25:23,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:25:23,206 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:23,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:25:23,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332578117] [2021-06-05 04:25:23,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332578117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:23,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757415777] [2021-06-05 04:25:23,206 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:23,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:25:23,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:25:23,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:25:23,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:25:23,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:23,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:23,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:23,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:25:23,388 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:23,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:25:23,391 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:23,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:25:23,410 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:23,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:23,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:23,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:25:23,415 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:23,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:25:23,418 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:23,448 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-05 04:25:23,448 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:25:23,450 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:25:23,450 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-05 04:25:23,475 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:23,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757415777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:23,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:25:23,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:25:23,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917411581] [2021-06-05 04:25:23,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:25:23,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:25:23,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:25:23,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:25:23,476 INFO L87 Difference]: Start difference. First operand 251 states and 689 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:23,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:25:23,923 INFO L93 Difference]: Finished difference Result 297 states and 755 transitions. [2021-06-05 04:25:23,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:25:23,924 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:25:23,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:25:23,924 INFO L225 Difference]: With dead ends: 297 [2021-06-05 04:25:23,924 INFO L226 Difference]: Without dead ends: 295 [2021-06-05 04:25:23,925 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 429.3ms TimeCoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:25:23,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-06-05 04:25:23,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 252. [2021-06-05 04:25:23,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.752988047808765) internal successors, (691), 251 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:23,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 691 transitions. [2021-06-05 04:25:23,929 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 691 transitions. Word has length 15 [2021-06-05 04:25:23,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:25:23,929 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 691 transitions. [2021-06-05 04:25:23,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:23,929 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 691 transitions. [2021-06-05 04:25:23,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:25:23,929 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:25:23,929 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:25:24,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable703,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:24,141 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:25:24,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:25:24,141 INFO L82 PathProgramCache]: Analyzing trace with hash -817731968, now seen corresponding path program 116 times [2021-06-05 04:25:24,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:25:24,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261527665] [2021-06-05 04:25:24,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:25:24,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:25:24,213 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:24,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:25:24,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261527665] [2021-06-05 04:25:24,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261527665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:24,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073433488] [2021-06-05 04:25:24,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:24,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:25:24,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:25:24,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:25:24,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:25:24,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:24,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:24,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:25:24,365 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:24,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:24,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:24,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:25:24,369 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:24,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:24,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:24,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:25:24,374 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:24,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:24,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:25:24,377 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:24,416 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:25:24,416 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:25:24,417 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:25:24,417 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:25:24,471 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:24,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073433488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:24,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:25:24,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:25:24,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528921364] [2021-06-05 04:25:24,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:25:24,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:25:24,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:25:24,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:25:24,472 INFO L87 Difference]: Start difference. First operand 252 states and 691 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:24,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:25:24,942 INFO L93 Difference]: Finished difference Result 342 states and 814 transitions. [2021-06-05 04:25:24,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:25:24,943 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:25:24,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:25:24,943 INFO L225 Difference]: With dead ends: 342 [2021-06-05 04:25:24,943 INFO L226 Difference]: Without dead ends: 341 [2021-06-05 04:25:24,944 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 472.7ms TimeCoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:25:24,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-06-05 04:25:24,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 243. [2021-06-05 04:25:24,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.727272727272727) internal successors, (660), 242 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:24,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 660 transitions. [2021-06-05 04:25:24,947 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 660 transitions. Word has length 15 [2021-06-05 04:25:24,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:25:24,947 INFO L482 AbstractCegarLoop]: Abstraction has 243 states and 660 transitions. [2021-06-05 04:25:24,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:24,948 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 660 transitions. [2021-06-05 04:25:24,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:25:24,948 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:25:24,949 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:25:25,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable710,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:25,172 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:25:25,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:25:25,172 INFO L82 PathProgramCache]: Analyzing trace with hash -16115740, now seen corresponding path program 117 times [2021-06-05 04:25:25,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:25:25,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096245146] [2021-06-05 04:25:25,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:25:25,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:25:25,241 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:25,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:25:25,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096245146] [2021-06-05 04:25:25,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096245146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:25,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664592766] [2021-06-05 04:25:25,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:25,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:25:25,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:25:25,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:25:25,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:25:25,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:25,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:25,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:25:25,351 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:25,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:25,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:25,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:25:25,354 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:25,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:25,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:25,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:25:25,358 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:25,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:25,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:25:25,361 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:25,395 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:25:25,395 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:25:25,396 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:25:25,396 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:25:25,459 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:25,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664592766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:25,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:25:25,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:25:25,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975278256] [2021-06-05 04:25:25,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:25:25,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:25:25,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:25:25,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:25:25,460 INFO L87 Difference]: Start difference. First operand 243 states and 660 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:25,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:25:25,935 INFO L93 Difference]: Finished difference Result 308 states and 761 transitions. [2021-06-05 04:25:25,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:25:25,936 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:25:25,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:25:25,936 INFO L225 Difference]: With dead ends: 308 [2021-06-05 04:25:25,936 INFO L226 Difference]: Without dead ends: 304 [2021-06-05 04:25:25,937 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 448.8ms TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:25:25,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-06-05 04:25:25,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 247. [2021-06-05 04:25:25,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.7357723577235773) internal successors, (673), 246 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:25,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 673 transitions. [2021-06-05 04:25:25,939 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 673 transitions. Word has length 15 [2021-06-05 04:25:25,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:25:25,939 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 673 transitions. [2021-06-05 04:25:25,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:25,939 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 673 transitions. [2021-06-05 04:25:25,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:25:25,940 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:25:25,940 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:25:26,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable714 [2021-06-05 04:25:26,140 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:25:26,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:25:26,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1702227966, now seen corresponding path program 118 times [2021-06-05 04:25:26,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:25:26,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493552148] [2021-06-05 04:25:26,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:25:26,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:25:26,222 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:26,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:25:26,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493552148] [2021-06-05 04:25:26,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493552148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:26,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324538897] [2021-06-05 04:25:26,223 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:26,255 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:25:26,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:25:26,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:25:26,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:25:26,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:26,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:26,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:25:26,339 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:26,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:26,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:26,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:25:26,342 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:26,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:26,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:26,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:25:26,346 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:26,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:26,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:25:26,349 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:26,382 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:25:26,382 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:25:26,383 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:25:26,383 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:25:26,430 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:26,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324538897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:26,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:25:26,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:25:26,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687460027] [2021-06-05 04:25:26,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:25:26,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:25:26,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:25:26,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:25:26,431 INFO L87 Difference]: Start difference. First operand 247 states and 673 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:26,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:25:26,673 INFO L93 Difference]: Finished difference Result 299 states and 749 transitions. [2021-06-05 04:25:26,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:25:26,673 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:25:26,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:25:26,674 INFO L225 Difference]: With dead ends: 299 [2021-06-05 04:25:26,674 INFO L226 Difference]: Without dead ends: 299 [2021-06-05 04:25:26,674 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 274.7ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:25:26,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-06-05 04:25:26,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 236. [2021-06-05 04:25:26,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.7148936170212767) internal successors, (638), 235 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:26,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 638 transitions. [2021-06-05 04:25:26,677 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 638 transitions. Word has length 15 [2021-06-05 04:25:26,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:25:26,677 INFO L482 AbstractCegarLoop]: Abstraction has 236 states and 638 transitions. [2021-06-05 04:25:26,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:26,677 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 638 transitions. [2021-06-05 04:25:26,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:25:26,677 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:25:26,677 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:25:26,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable720,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:26,878 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:25:26,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:25:26,878 INFO L82 PathProgramCache]: Analyzing trace with hash -846468574, now seen corresponding path program 119 times [2021-06-05 04:25:26,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:25:26,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484201410] [2021-06-05 04:25:26,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:25:26,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:25:26,929 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:26,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:25:26,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484201410] [2021-06-05 04:25:26,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484201410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:26,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399962199] [2021-06-05 04:25:26,929 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:26,960 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:25:26,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:25:26,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:25:26,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:25:27,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:27,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:27,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:25:27,064 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:27,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:27,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:25:27,069 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:27,094 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:25:27,094 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:25:27,095 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:25:27,095 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:25:27,113 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:27,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399962199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:27,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:25:27,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 04:25:27,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552196097] [2021-06-05 04:25:27,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:25:27,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:25:27,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:25:27,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:25:27,114 INFO L87 Difference]: Start difference. First operand 236 states and 638 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:27,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:25:27,273 INFO L93 Difference]: Finished difference Result 299 states and 753 transitions. [2021-06-05 04:25:27,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:25:27,273 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:25:27,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:25:27,274 INFO L225 Difference]: With dead ends: 299 [2021-06-05 04:25:27,274 INFO L226 Difference]: Without dead ends: 299 [2021-06-05 04:25:27,274 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 117.7ms TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:25:27,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-06-05 04:25:27,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 241. [2021-06-05 04:25:27,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.7291666666666665) internal successors, (655), 240 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:27,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 655 transitions. [2021-06-05 04:25:27,277 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 655 transitions. Word has length 15 [2021-06-05 04:25:27,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:25:27,277 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 655 transitions. [2021-06-05 04:25:27,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:27,277 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 655 transitions. [2021-06-05 04:25:27,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:25:27,277 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:25:27,277 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:25:27,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable724,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:27,478 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:25:27,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:25:27,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1766169282, now seen corresponding path program 120 times [2021-06-05 04:25:27,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:25:27,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686853454] [2021-06-05 04:25:27,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:25:27,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:25:27,543 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:27,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:25:27,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686853454] [2021-06-05 04:25:27,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686853454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:27,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782934954] [2021-06-05 04:25:27,543 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:27,581 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:25:27,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:25:27,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:25:27,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:25:27,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:25:27,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:27,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:27,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:27,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:25:27,723 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:27,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:25:27,727 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:27,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:25:27,731 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:27,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:27,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:27,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:25:27,735 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:27,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:25:27,738 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:27,773 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-05 04:25:27,774 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:25:27,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:25:27,775 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-05 04:25:27,804 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:27,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782934954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:27,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:25:27,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 04:25:27,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197129165] [2021-06-05 04:25:27,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:25:27,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:25:27,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:25:27,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:25:27,805 INFO L87 Difference]: Start difference. First operand 241 states and 655 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:28,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:25:28,082 INFO L93 Difference]: Finished difference Result 275 states and 703 transitions. [2021-06-05 04:25:28,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:25:28,082 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:25:28,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:25:28,082 INFO L225 Difference]: With dead ends: 275 [2021-06-05 04:25:28,082 INFO L226 Difference]: Without dead ends: 271 [2021-06-05 04:25:28,083 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 290.9ms TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:25:28,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-06-05 04:25:28,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 241. [2021-06-05 04:25:28,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.720833333333333) internal successors, (653), 240 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:28,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 653 transitions. [2021-06-05 04:25:28,085 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 653 transitions. Word has length 15 [2021-06-05 04:25:28,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:25:28,085 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 653 transitions. [2021-06-05 04:25:28,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:28,085 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 653 transitions. [2021-06-05 04:25:28,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:25:28,086 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:25:28,086 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:25:28,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable727,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:28,286 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:25:28,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:25:28,286 INFO L82 PathProgramCache]: Analyzing trace with hash -838738176, now seen corresponding path program 121 times [2021-06-05 04:25:28,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:25:28,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695773829] [2021-06-05 04:25:28,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:25:28,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:25:28,344 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:28,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:25:28,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695773829] [2021-06-05 04:25:28,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695773829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:28,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930945026] [2021-06-05 04:25:28,344 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:28,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:25:28,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:25:28,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:25:28,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:28,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:28,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:25:28,448 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:28,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:28,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:28,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:25:28,452 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:28,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:28,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:28,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:25:28,456 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:28,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:28,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:25:28,459 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:28,492 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:25:28,493 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:25:28,493 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:25:28,493 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:25:28,539 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:28,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930945026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:28,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:25:28,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 04:25:28,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848293446] [2021-06-05 04:25:28,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:25:28,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:25:28,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:25:28,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:25:28,540 INFO L87 Difference]: Start difference. First operand 241 states and 653 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:28,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:25:28,765 INFO L93 Difference]: Finished difference Result 314 states and 767 transitions. [2021-06-05 04:25:28,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:25:28,765 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:25:28,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:25:28,766 INFO L225 Difference]: With dead ends: 314 [2021-06-05 04:25:28,766 INFO L226 Difference]: Without dead ends: 314 [2021-06-05 04:25:28,766 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 229.7ms TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:25:28,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-06-05 04:25:28,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 243. [2021-06-05 04:25:28,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.727272727272727) internal successors, (660), 242 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:28,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 660 transitions. [2021-06-05 04:25:28,768 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 660 transitions. Word has length 15 [2021-06-05 04:25:28,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:25:28,768 INFO L482 AbstractCegarLoop]: Abstraction has 243 states and 660 transitions. [2021-06-05 04:25:28,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:28,768 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 660 transitions. [2021-06-05 04:25:28,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:25:28,769 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:25:28,769 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:25:28,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable734 [2021-06-05 04:25:28,969 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:25:28,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:25:28,970 INFO L82 PathProgramCache]: Analyzing trace with hash -37121948, now seen corresponding path program 122 times [2021-06-05 04:25:28,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:25:28,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389766483] [2021-06-05 04:25:28,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:25:28,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:25:29,037 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:29,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:25:29,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389766483] [2021-06-05 04:25:29,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389766483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:29,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732326795] [2021-06-05 04:25:29,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:29,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:25:29,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:25:29,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:25:29,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:25:29,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:29,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:29,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:25:29,135 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:29,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:29,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:29,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:25:29,139 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:29,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:29,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:29,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:25:29,142 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:29,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:29,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:25:29,146 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:29,180 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:25:29,180 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:25:29,180 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:25:29,181 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:25:29,241 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:29,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732326795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:29,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:25:29,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 04:25:29,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401077392] [2021-06-05 04:25:29,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:25:29,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:25:29,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:25:29,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:25:29,242 INFO L87 Difference]: Start difference. First operand 243 states and 660 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:29,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:25:29,567 INFO L93 Difference]: Finished difference Result 292 states and 739 transitions. [2021-06-05 04:25:29,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:25:29,567 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:25:29,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:25:29,568 INFO L225 Difference]: With dead ends: 292 [2021-06-05 04:25:29,568 INFO L226 Difference]: Without dead ends: 289 [2021-06-05 04:25:29,568 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 336.3ms TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:25:29,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-06-05 04:25:29,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 246. [2021-06-05 04:25:29,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.7346938775510203) internal successors, (670), 245 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:29,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 670 transitions. [2021-06-05 04:25:29,570 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 670 transitions. Word has length 15 [2021-06-05 04:25:29,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:25:29,571 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 670 transitions. [2021-06-05 04:25:29,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:29,571 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 670 transitions. [2021-06-05 04:25:29,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:25:29,571 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:25:29,571 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:25:29,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable738,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:29,771 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:25:29,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:25:29,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1681221758, now seen corresponding path program 123 times [2021-06-05 04:25:29,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:25:29,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532451244] [2021-06-05 04:25:29,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:25:29,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:25:29,836 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:29,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:25:29,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532451244] [2021-06-05 04:25:29,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532451244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:29,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908559035] [2021-06-05 04:25:29,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:29,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:25:29,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:25:29,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:25:29,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:25:29,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:29,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:29,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:25:29,968 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:29,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:29,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:29,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:25:29,972 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:29,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:29,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:29,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:25:29,977 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:29,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:29,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:25:29,980 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:30,019 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:25:30,019 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:25:30,020 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:25:30,020 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:25:30,073 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:30,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908559035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:30,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:25:30,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 04:25:30,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932168775] [2021-06-05 04:25:30,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:25:30,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:25:30,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:25:30,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:25:30,074 INFO L87 Difference]: Start difference. First operand 246 states and 670 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:30,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:25:30,366 INFO L93 Difference]: Finished difference Result 286 states and 730 transitions. [2021-06-05 04:25:30,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:25:30,366 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:25:30,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:25:30,367 INFO L225 Difference]: With dead ends: 286 [2021-06-05 04:25:30,367 INFO L226 Difference]: Without dead ends: 286 [2021-06-05 04:25:30,367 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 255.1ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:25:30,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-06-05 04:25:30,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 241. [2021-06-05 04:25:30,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.7083333333333335) internal successors, (650), 240 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:30,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 650 transitions. [2021-06-05 04:25:30,369 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 650 transitions. Word has length 15 [2021-06-05 04:25:30,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:25:30,369 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 650 transitions. [2021-06-05 04:25:30,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:30,370 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 650 transitions. [2021-06-05 04:25:30,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:25:30,370 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:25:30,370 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:25:30,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable744 [2021-06-05 04:25:30,570 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:25:30,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:25:30,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1255057792, now seen corresponding path program 124 times [2021-06-05 04:25:30,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:25:30,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902994214] [2021-06-05 04:25:30,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:25:30,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:25:30,641 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:30,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:25:30,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902994214] [2021-06-05 04:25:30,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902994214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:30,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697397850] [2021-06-05 04:25:30,642 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:30,678 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:25:30,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:25:30,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:25:30,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:25:30,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:30,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:30,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:25:30,760 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:30,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:30,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:30,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:25:30,764 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:30,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:30,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:30,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:25:30,768 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:30,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:30,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:25:30,771 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:30,804 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:25:30,805 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:25:30,805 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:25:30,805 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:25:30,853 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:30,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697397850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:30,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:25:30,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:25:30,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904082790] [2021-06-05 04:25:30,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:25:30,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:25:30,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:25:30,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:25:30,854 INFO L87 Difference]: Start difference. First operand 241 states and 650 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:31,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:25:31,070 INFO L93 Difference]: Finished difference Result 321 states and 788 transitions. [2021-06-05 04:25:31,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:25:31,070 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:25:31,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:25:31,070 INFO L225 Difference]: With dead ends: 321 [2021-06-05 04:25:31,071 INFO L226 Difference]: Without dead ends: 321 [2021-06-05 04:25:31,071 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 244.3ms TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:25:31,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-06-05 04:25:31,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 245. [2021-06-05 04:25:31,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.7254098360655736) internal successors, (665), 244 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:31,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 665 transitions. [2021-06-05 04:25:31,073 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 665 transitions. Word has length 15 [2021-06-05 04:25:31,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:25:31,073 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 665 transitions. [2021-06-05 04:25:31,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:31,073 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 665 transitions. [2021-06-05 04:25:31,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:25:31,074 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:25:31,074 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:25:31,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable748 [2021-06-05 04:25:31,274 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:25:31,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:25:31,275 INFO L82 PathProgramCache]: Analyzing trace with hash -453441564, now seen corresponding path program 125 times [2021-06-05 04:25:31,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:25:31,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982315053] [2021-06-05 04:25:31,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:25:31,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:25:31,356 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:31,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:25:31,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982315053] [2021-06-05 04:25:31,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982315053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:31,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081335082] [2021-06-05 04:25:31,356 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:31,382 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:25:31,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:25:31,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:25:31,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:25:31,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:31,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:31,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:25:31,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:31,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:31,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:31,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:25:31,469 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:31,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:31,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:31,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:25:31,474 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:31,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:31,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:25:31,477 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:31,511 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:25:31,511 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:25:31,511 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:25:31,511 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:25:31,572 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:31,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081335082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:31,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:25:31,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:25:31,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383339146] [2021-06-05 04:25:31,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:25:31,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:25:31,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:25:31,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:25:31,573 INFO L87 Difference]: Start difference. First operand 245 states and 665 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:32,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:25:32,103 INFO L93 Difference]: Finished difference Result 330 states and 799 transitions. [2021-06-05 04:25:32,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:25:32,103 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:25:32,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:25:32,104 INFO L225 Difference]: With dead ends: 330 [2021-06-05 04:25:32,104 INFO L226 Difference]: Without dead ends: 322 [2021-06-05 04:25:32,104 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 499.7ms TimeCoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:25:32,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-06-05 04:25:32,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 251. [2021-06-05 04:25:32,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 2.728) internal successors, (682), 250 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:32,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 682 transitions. [2021-06-05 04:25:32,108 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 682 transitions. Word has length 15 [2021-06-05 04:25:32,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:25:32,108 INFO L482 AbstractCegarLoop]: Abstraction has 251 states and 682 transitions. [2021-06-05 04:25:32,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:32,108 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 682 transitions. [2021-06-05 04:25:32,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:25:32,109 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:25:32,109 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:25:32,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable752 [2021-06-05 04:25:32,325 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:25:32,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:25:32,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1264902142, now seen corresponding path program 126 times [2021-06-05 04:25:32,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:25:32,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075204980] [2021-06-05 04:25:32,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:25:32,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:25:32,413 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:32,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:25:32,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075204980] [2021-06-05 04:25:32,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075204980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:32,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207017238] [2021-06-05 04:25:32,414 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:32,449 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:25:32,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:25:32,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:25:32,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:25:32,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:32,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:32,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:25:32,531 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:32,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:32,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:32,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:25:32,535 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:32,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:32,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:32,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:25:32,538 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:32,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:32,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:25:32,541 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:32,574 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:25:32,575 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:25:32,575 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:25:32,575 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:25:32,623 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:32,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207017238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:32,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:25:32,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:25:32,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479417204] [2021-06-05 04:25:32,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:25:32,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:25:32,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:25:32,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:25:32,624 INFO L87 Difference]: Start difference. First operand 251 states and 682 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:32,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:25:32,978 INFO L93 Difference]: Finished difference Result 330 states and 831 transitions. [2021-06-05 04:25:32,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:25:32,978 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:25:32,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:25:32,979 INFO L225 Difference]: With dead ends: 330 [2021-06-05 04:25:32,979 INFO L226 Difference]: Without dead ends: 330 [2021-06-05 04:25:32,979 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 362.4ms TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:25:32,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-06-05 04:25:32,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 265. [2021-06-05 04:25:32,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.746212121212121) internal successors, (725), 264 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:32,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 725 transitions. [2021-06-05 04:25:32,982 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 725 transitions. Word has length 15 [2021-06-05 04:25:32,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:25:32,982 INFO L482 AbstractCegarLoop]: Abstraction has 265 states and 725 transitions. [2021-06-05 04:25:32,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:32,982 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 725 transitions. [2021-06-05 04:25:32,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:25:32,983 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:25:32,983 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:25:33,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable758,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:33,183 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:25:33,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:25:33,184 INFO L82 PathProgramCache]: Analyzing trace with hash -445711166, now seen corresponding path program 127 times [2021-06-05 04:25:33,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:25:33,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311032278] [2021-06-05 04:25:33,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:25:33,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:25:33,249 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:33,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:25:33,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311032278] [2021-06-05 04:25:33,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311032278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:33,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782045266] [2021-06-05 04:25:33,250 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:33,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:25:33,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:25:33,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:25:33,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:33,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:33,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:25:33,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:33,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:33,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:25:33,375 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:33,393 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-06-05 04:25:33,393 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:25:33,393 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:25:33,393 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-06-05 04:25:33,414 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:33,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782045266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:33,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:25:33,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:25:33,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568486053] [2021-06-05 04:25:33,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:25:33,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:25:33,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:25:33,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:25:33,415 INFO L87 Difference]: Start difference. First operand 265 states and 725 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:33,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:25:33,861 INFO L93 Difference]: Finished difference Result 361 states and 878 transitions. [2021-06-05 04:25:33,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:25:33,862 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:25:33,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:25:33,862 INFO L225 Difference]: With dead ends: 361 [2021-06-05 04:25:33,862 INFO L226 Difference]: Without dead ends: 361 [2021-06-05 04:25:33,862 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 398.5ms TimeCoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:25:33,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-06-05 04:25:33,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 256. [2021-06-05 04:25:33,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 2.7294117647058824) internal successors, (696), 255 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:33,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 696 transitions. [2021-06-05 04:25:33,865 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 696 transitions. Word has length 15 [2021-06-05 04:25:33,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:25:33,865 INFO L482 AbstractCegarLoop]: Abstraction has 256 states and 696 transitions. [2021-06-05 04:25:33,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:33,865 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 696 transitions. [2021-06-05 04:25:33,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:25:33,866 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:25:33,866 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:25:34,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable762 [2021-06-05 04:25:34,066 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:25:34,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:25:34,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1935116162, now seen corresponding path program 128 times [2021-06-05 04:25:34,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:25:34,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492011792] [2021-06-05 04:25:34,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:25:34,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:25:34,125 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:34,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:25:34,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492011792] [2021-06-05 04:25:34,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492011792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:34,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104653576] [2021-06-05 04:25:34,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:34,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:25:34,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:25:34,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:25:34,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:25:34,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:34,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:34,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:25:34,242 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:34,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:34,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:25:34,245 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:34,263 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-06-05 04:25:34,263 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:25:34,263 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:25:34,263 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-06-05 04:25:34,285 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:34,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104653576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:34,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:25:34,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 04:25:34,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698040585] [2021-06-05 04:25:34,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:25:34,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:25:34,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:25:34,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:25:34,286 INFO L87 Difference]: Start difference. First operand 256 states and 696 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:34,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:25:34,453 INFO L93 Difference]: Finished difference Result 323 states and 803 transitions. [2021-06-05 04:25:34,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:25:34,454 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:25:34,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:25:34,454 INFO L225 Difference]: With dead ends: 323 [2021-06-05 04:25:34,454 INFO L226 Difference]: Without dead ends: 323 [2021-06-05 04:25:34,454 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 134.4ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:25:34,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-06-05 04:25:34,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 235. [2021-06-05 04:25:34,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.6794871794871793) internal successors, (627), 234 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:34,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 627 transitions. [2021-06-05 04:25:34,457 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 627 transitions. Word has length 15 [2021-06-05 04:25:34,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:25:34,457 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 627 transitions. [2021-06-05 04:25:34,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:34,457 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 627 transitions. [2021-06-05 04:25:34,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:25:34,457 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:25:34,457 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:25:34,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable764 [2021-06-05 04:25:34,658 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:25:34,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:25:34,658 INFO L82 PathProgramCache]: Analyzing trace with hash 757370424, now seen corresponding path program 129 times [2021-06-05 04:25:34,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:25:34,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36647112] [2021-06-05 04:25:34,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:25:34,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:25:35,203 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:35,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:25:35,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36647112] [2021-06-05 04:25:35,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36647112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:35,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343320091] [2021-06-05 04:25:35,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:35,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:25:35,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:25:35,232 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 04:25:35,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:25:35,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:35,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:35,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:35,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:35,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:35,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:35,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 35 [2021-06-05 04:25:35,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:35,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:35,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:35,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:35,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:35,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:35,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-06-05 04:25:35,855 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:35,867 INFO L628 ElimStorePlain]: treesize reduction 99, result has 10.0 percent of original size [2021-06-05 04:25:35,867 INFO L518 ElimStorePlain]: Eliminatee v_prenex_65 vanished before elimination [2021-06-05 04:25:35,867 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:25:35,868 INFO L518 ElimStorePlain]: Eliminatee v_prenex_64 vanished before elimination [2021-06-05 04:25:35,868 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:25:35,868 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:173, output treesize:11 [2021-06-05 04:25:35,896 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:35,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343320091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:35,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:25:35,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 04:25:35,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729549782] [2021-06-05 04:25:35,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:25:35,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:25:35,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:25:35,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:25:35,897 INFO L87 Difference]: Start difference. First operand 235 states and 627 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:36,485 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2021-06-05 04:25:36,725 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 83 [2021-06-05 04:25:36,868 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 77 [2021-06-05 04:25:37,098 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 87 [2021-06-05 04:25:37,428 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 87 [2021-06-05 04:25:37,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:25:37,758 INFO L93 Difference]: Finished difference Result 362 states and 942 transitions. [2021-06-05 04:25:37,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:25:37,758 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:25:37,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:25:37,759 INFO L225 Difference]: With dead ends: 362 [2021-06-05 04:25:37,759 INFO L226 Difference]: Without dead ends: 359 [2021-06-05 04:25:37,759 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 2395.4ms TimeCoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:25:37,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-06-05 04:25:37,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 246. [2021-06-05 04:25:37,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.6653061224489796) internal successors, (653), 245 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:37,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 653 transitions. [2021-06-05 04:25:37,762 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 653 transitions. Word has length 16 [2021-06-05 04:25:37,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:25:37,762 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 653 transitions. [2021-06-05 04:25:37,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:37,762 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 653 transitions. [2021-06-05 04:25:37,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:25:37,762 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:25:37,763 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:25:37,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable766 [2021-06-05 04:25:37,963 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:25:37,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:25:37,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1098862454, now seen corresponding path program 130 times [2021-06-05 04:25:37,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:25:37,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875117551] [2021-06-05 04:25:37,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:25:37,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:25:38,179 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:38,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:25:38,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875117551] [2021-06-05 04:25:38,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875117551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:38,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039301442] [2021-06-05 04:25:38,179 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:38,212 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:25:38,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:25:38,213 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 04:25:38,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:25:38,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:38,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:38,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:38,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:38,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:38,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:38,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-06-05 04:25:38,704 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:38,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:38,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:38,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:38,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:38,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:38,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:38,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2021-06-05 04:25:38,715 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:38,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:38,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:38,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:38,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:38,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-06-05 04:25:38,721 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:38,733 INFO L628 ElimStorePlain]: treesize reduction 66, result has 14.3 percent of original size [2021-06-05 04:25:38,734 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:25:38,734 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:25:38,734 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:161, output treesize:11 [2021-06-05 04:25:38,758 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:38,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039301442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:38,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:25:38,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 04:25:38,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952417525] [2021-06-05 04:25:38,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:25:38,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:25:38,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:25:38,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:25:38,758 INFO L87 Difference]: Start difference. First operand 246 states and 653 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:39,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:25:39,718 INFO L93 Difference]: Finished difference Result 334 states and 814 transitions. [2021-06-05 04:25:39,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:25:39,718 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:25:39,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:25:39,719 INFO L225 Difference]: With dead ends: 334 [2021-06-05 04:25:39,719 INFO L226 Difference]: Without dead ends: 327 [2021-06-05 04:25:39,719 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1205.9ms TimeCoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:25:39,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-06-05 04:25:39,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 246. [2021-06-05 04:25:39,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.6897959183673468) internal successors, (659), 245 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:39,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 659 transitions. [2021-06-05 04:25:39,722 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 659 transitions. Word has length 16 [2021-06-05 04:25:39,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:25:39,722 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 659 transitions. [2021-06-05 04:25:39,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:39,722 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 659 transitions. [2021-06-05 04:25:39,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:25:39,722 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:25:39,722 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:25:39,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable782 [2021-06-05 04:25:39,923 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:25:39,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:25:39,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1091132056, now seen corresponding path program 131 times [2021-06-05 04:25:39,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:25:39,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721734920] [2021-06-05 04:25:39,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:25:39,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:25:40,243 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:40,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:25:40,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721734920] [2021-06-05 04:25:40,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721734920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:40,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746515139] [2021-06-05 04:25:40,243 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:40,271 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:25:40,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:25:40,272 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 04:25:40,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:25:40,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:40,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:40,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:40,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:40,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:40,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:40,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-06-05 04:25:40,717 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:40,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:40,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:40,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:40,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:40,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:40,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-06-05 04:25:40,727 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:40,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:40,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:40,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:40,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:40,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:40,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:40,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:40,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-06-05 04:25:40,738 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:40,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:40,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:40,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:40,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:40,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 41 [2021-06-05 04:25:40,745 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:40,810 INFO L628 ElimStorePlain]: treesize reduction 95, result has 45.4 percent of original size [2021-06-05 04:25:40,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:40,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 04:25:40,813 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:40,838 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:25:40,853 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:25:40,853 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:301, output treesize:56 [2021-06-05 04:25:40,941 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:40,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746515139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:40,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:25:40,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:25:40,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875905782] [2021-06-05 04:25:40,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:25:40,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:25:40,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:25:40,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:25:40,942 INFO L87 Difference]: Start difference. First operand 246 states and 659 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:41,330 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-06-05 04:25:41,680 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 68 [2021-06-05 04:25:41,850 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2021-06-05 04:25:42,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:25:42,164 INFO L93 Difference]: Finished difference Result 358 states and 879 transitions. [2021-06-05 04:25:42,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:25:42,164 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:25:42,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:25:42,165 INFO L225 Difference]: With dead ends: 358 [2021-06-05 04:25:42,165 INFO L226 Difference]: Without dead ends: 351 [2021-06-05 04:25:42,165 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1597.3ms TimeCoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:25:42,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-06-05 04:25:42,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 258. [2021-06-05 04:25:42,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.7315175097276265) internal successors, (702), 257 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:42,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 702 transitions. [2021-06-05 04:25:42,168 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 702 transitions. Word has length 16 [2021-06-05 04:25:42,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:25:42,168 INFO L482 AbstractCegarLoop]: Abstraction has 258 states and 702 transitions. [2021-06-05 04:25:42,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:42,168 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 702 transitions. [2021-06-05 04:25:42,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:25:42,169 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:25:42,169 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:25:42,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable811 [2021-06-05 04:25:42,369 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:25:42,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:25:42,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1714430244, now seen corresponding path program 132 times [2021-06-05 04:25:42,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:25:42,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157889753] [2021-06-05 04:25:42,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:25:42,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:25:42,638 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:42,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:25:42,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157889753] [2021-06-05 04:25:42,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157889753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:42,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297953449] [2021-06-05 04:25:42,638 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:42,666 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:25:42,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:25:42,667 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 04:25:42,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:25:43,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:43,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:43,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:43,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:43,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:43,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:43,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:43,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-06-05 04:25:43,033 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:43,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:43,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:43,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:43,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:43,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:43,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:43,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:43,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-06-05 04:25:43,044 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:43,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:43,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:43,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:43,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:43,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:43,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:43,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:43,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-06-05 04:25:43,056 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:43,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:43,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:43,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:43,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:43,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:43,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:43,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 41 [2021-06-05 04:25:43,067 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:43,139 INFO L628 ElimStorePlain]: treesize reduction 85, result has 43.3 percent of original size [2021-06-05 04:25:43,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:43,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 04:25:43,143 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:43,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:25:43,166 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:25:43,166 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:273, output treesize:54 [2021-06-05 04:25:43,239 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:43,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297953449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:43,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:25:43,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 04:25:43,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750237149] [2021-06-05 04:25:43,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:25:43,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:25:43,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:25:43,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:25:43,240 INFO L87 Difference]: Start difference. First operand 258 states and 702 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:44,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:25:44,007 INFO L93 Difference]: Finished difference Result 317 states and 820 transitions. [2021-06-05 04:25:44,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:25:44,007 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:25:44,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:25:44,008 INFO L225 Difference]: With dead ends: 317 [2021-06-05 04:25:44,008 INFO L226 Difference]: Without dead ends: 309 [2021-06-05 04:25:44,009 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1109.1ms TimeCoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:25:44,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-06-05 04:25:44,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 264. [2021-06-05 04:25:44,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.7338403041825097) internal successors, (719), 263 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:44,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 719 transitions. [2021-06-05 04:25:44,013 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 719 transitions. Word has length 16 [2021-06-05 04:25:44,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:25:44,013 INFO L482 AbstractCegarLoop]: Abstraction has 264 states and 719 transitions. [2021-06-05 04:25:44,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:44,013 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 719 transitions. [2021-06-05 04:25:44,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:25:44,013 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:25:44,013 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:25:44,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable824,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:44,229 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:25:44,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:25:44,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1507451672, now seen corresponding path program 133 times [2021-06-05 04:25:44,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:25:44,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848269435] [2021-06-05 04:25:44,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:25:44,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:25:44,488 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:44,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:25:44,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848269435] [2021-06-05 04:25:44,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848269435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:44,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968147501] [2021-06-05 04:25:44,489 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:44,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:25:44,516 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 04:25:44,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:25:44,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:44,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:44,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:44,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:44,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:44,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:44,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-06-05 04:25:44,934 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:44,952 INFO L628 ElimStorePlain]: treesize reduction 133, result has 7.6 percent of original size [2021-06-05 04:25:44,952 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:25:44,952 INFO L518 ElimStorePlain]: Eliminatee v_prenex_69 vanished before elimination [2021-06-05 04:25:44,952 INFO L518 ElimStorePlain]: Eliminatee v_prenex_68 vanished before elimination [2021-06-05 04:25:44,952 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:25:44,953 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:173, output treesize:11 [2021-06-05 04:25:44,962 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:44,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968147501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:44,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:25:44,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-05 04:25:44,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298935077] [2021-06-05 04:25:44,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:25:44,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:25:44,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:25:44,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:25:44,963 INFO L87 Difference]: Start difference. First operand 264 states and 719 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:45,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:25:45,987 INFO L93 Difference]: Finished difference Result 331 states and 859 transitions. [2021-06-05 04:25:45,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:25:45,987 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:25:45,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:25:45,988 INFO L225 Difference]: With dead ends: 331 [2021-06-05 04:25:45,988 INFO L226 Difference]: Without dead ends: 327 [2021-06-05 04:25:45,988 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1227.9ms TimeCoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:25:45,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-06-05 04:25:45,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 264. [2021-06-05 04:25:45,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.7338403041825097) internal successors, (719), 263 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:45,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 719 transitions. [2021-06-05 04:25:45,991 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 719 transitions. Word has length 16 [2021-06-05 04:25:45,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:25:45,991 INFO L482 AbstractCegarLoop]: Abstraction has 264 states and 719 transitions. [2021-06-05 04:25:45,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:45,991 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 719 transitions. [2021-06-05 04:25:45,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:25:45,991 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:25:45,991 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:25:46,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable834 [2021-06-05 04:25:46,192 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:25:46,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:25:46,192 INFO L82 PathProgramCache]: Analyzing trace with hash 608535494, now seen corresponding path program 134 times [2021-06-05 04:25:46,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:25:46,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148395338] [2021-06-05 04:25:46,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:25:46,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:25:46,748 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:46,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:25:46,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148395338] [2021-06-05 04:25:46,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148395338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:46,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922487928] [2021-06-05 04:25:46,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:46,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:25:46,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:25:46,778 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 04:25:46,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:25:47,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:47,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:47,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:47,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-06-05 04:25:47,309 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:47,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:47,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:47,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 29 [2021-06-05 04:25:47,315 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:47,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:47,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:47,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 04:25:47,322 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:47,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:47,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:47,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 29 [2021-06-05 04:25:47,327 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:47,341 INFO L628 ElimStorePlain]: treesize reduction 77, result has 16.3 percent of original size [2021-06-05 04:25:47,342 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:25:47,342 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:25:47,342 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:181, output treesize:11 [2021-06-05 04:25:47,371 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:47,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922487928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:47,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:25:47,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-06-05 04:25:47,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703892398] [2021-06-05 04:25:47,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:25:47,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:25:47,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:25:47,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:25:47,371 INFO L87 Difference]: Start difference. First operand 264 states and 719 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:48,159 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 64 [2021-06-05 04:25:48,396 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 67 [2021-06-05 04:25:48,745 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 66 [2021-06-05 04:25:48,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:25:48,863 INFO L93 Difference]: Finished difference Result 355 states and 883 transitions. [2021-06-05 04:25:48,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:25:48,863 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:25:48,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:25:48,864 INFO L225 Difference]: With dead ends: 355 [2021-06-05 04:25:48,864 INFO L226 Difference]: Without dead ends: 342 [2021-06-05 04:25:48,864 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 2029.6ms TimeCoverageRelationStatistics Valid=134, Invalid=922, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:25:48,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-06-05 04:25:48,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 286. [2021-06-05 04:25:48,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.7578947368421054) internal successors, (786), 285 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:48,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 786 transitions. [2021-06-05 04:25:48,867 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 786 transitions. Word has length 16 [2021-06-05 04:25:48,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:25:48,867 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 786 transitions. [2021-06-05 04:25:48,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:48,867 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 786 transitions. [2021-06-05 04:25:48,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:25:48,868 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:25:48,868 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:25:49,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable851 [2021-06-05 04:25:49,068 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:25:49,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:25:49,069 INFO L82 PathProgramCache]: Analyzing trace with hash 855908230, now seen corresponding path program 135 times [2021-06-05 04:25:49,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:25:49,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933116833] [2021-06-05 04:25:49,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:25:49,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:25:49,188 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:49,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:25:49,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933116833] [2021-06-05 04:25:49,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933116833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:49,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107313102] [2021-06-05 04:25:49,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:49,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:25:49,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:25:49,217 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 04:25:49,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:25:49,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:49,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:49,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:49,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:49,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:49,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:49,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2021-06-05 04:25:49,781 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:49,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:49,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:49,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:49,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:49,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:49,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-06-05 04:25:49,790 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:49,807 INFO L628 ElimStorePlain]: treesize reduction 91, result has 10.8 percent of original size [2021-06-05 04:25:49,807 INFO L518 ElimStorePlain]: Eliminatee v_prenex_71 vanished before elimination [2021-06-05 04:25:49,807 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-05 04:25:49,807 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:25:49,808 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:25:49,808 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:161, output treesize:11 [2021-06-05 04:25:49,819 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:49,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107313102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:49,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:25:49,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-05 04:25:49,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955409761] [2021-06-05 04:25:49,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:25:49,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:25:49,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:25:49,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:25:49,820 INFO L87 Difference]: Start difference. First operand 286 states and 786 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:50,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:25:50,617 INFO L93 Difference]: Finished difference Result 346 states and 891 transitions. [2021-06-05 04:25:50,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:25:50,617 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:25:50,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:25:50,618 INFO L225 Difference]: With dead ends: 346 [2021-06-05 04:25:50,618 INFO L226 Difference]: Without dead ends: 342 [2021-06-05 04:25:50,618 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1094.7ms TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:25:50,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-06-05 04:25:50,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 275. [2021-06-05 04:25:50,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.7445255474452557) internal successors, (752), 274 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:50,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 752 transitions. [2021-06-05 04:25:50,621 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 752 transitions. Word has length 16 [2021-06-05 04:25:50,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:25:50,621 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 752 transitions. [2021-06-05 04:25:50,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:50,621 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 752 transitions. [2021-06-05 04:25:50,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:25:50,622 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:25:50,622 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:25:50,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable881 [2021-06-05 04:25:50,822 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:25:50,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:25:50,822 INFO L82 PathProgramCache]: Analyzing trace with hash 827171624, now seen corresponding path program 136 times [2021-06-05 04:25:50,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:25:50,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187146958] [2021-06-05 04:25:50,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:25:50,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:25:51,031 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:51,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:25:51,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187146958] [2021-06-05 04:25:51,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187146958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:51,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116299886] [2021-06-05 04:25:51,032 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:51,058 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:25:51,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:25:51,058 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 04:25:51,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:25:51,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:51,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:51,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:51,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:51,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:51,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:51,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-06-05 04:25:51,482 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:51,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:51,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:51,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:51,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:51,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:51,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-06-05 04:25:51,491 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:51,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:51,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:51,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:51,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:51,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:51,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2021-06-05 04:25:51,498 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:51,510 INFO L628 ElimStorePlain]: treesize reduction 72, result has 13.3 percent of original size [2021-06-05 04:25:51,510 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:25:51,510 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:25:51,510 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:161, output treesize:11 [2021-06-05 04:25:51,533 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:51,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116299886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:51,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:25:51,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 04:25:51,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831628621] [2021-06-05 04:25:51,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:25:51,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:25:51,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:25:51,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:25:51,534 INFO L87 Difference]: Start difference. First operand 275 states and 752 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:52,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:25:52,163 INFO L93 Difference]: Finished difference Result 399 states and 1002 transitions. [2021-06-05 04:25:52,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:25:52,163 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:25:52,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:25:52,164 INFO L225 Difference]: With dead ends: 399 [2021-06-05 04:25:52,164 INFO L226 Difference]: Without dead ends: 396 [2021-06-05 04:25:52,164 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 807.3ms TimeCoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:25:52,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-06-05 04:25:52,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 307. [2021-06-05 04:25:52,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.810457516339869) internal successors, (860), 306 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:52,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 860 transitions. [2021-06-05 04:25:52,167 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 860 transitions. Word has length 16 [2021-06-05 04:25:52,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:25:52,167 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 860 transitions. [2021-06-05 04:25:52,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:52,167 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 860 transitions. [2021-06-05 04:25:52,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:25:52,168 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:25:52,168 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:25:52,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable902,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:52,368 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:25:52,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:25:52,369 INFO L82 PathProgramCache]: Analyzing trace with hash 418582406, now seen corresponding path program 137 times [2021-06-05 04:25:52,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:25:52,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033392747] [2021-06-05 04:25:52,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:25:52,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:25:52,556 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:52,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:25:52,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033392747] [2021-06-05 04:25:52,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033392747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:52,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507431156] [2021-06-05 04:25:52,556 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:52,584 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:25:52,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:25:52,584 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 04:25:52,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:25:52,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:52,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:52,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:52,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:52,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:52,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:52,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-06-05 04:25:52,983 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:53,001 INFO L628 ElimStorePlain]: treesize reduction 129, result has 7.9 percent of original size [2021-06-05 04:25:53,001 INFO L518 ElimStorePlain]: Eliminatee v_prenex_75 vanished before elimination [2021-06-05 04:25:53,002 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:25:53,002 INFO L518 ElimStorePlain]: Eliminatee v_prenex_74 vanished before elimination [2021-06-05 04:25:53,002 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:25:53,002 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:173, output treesize:11 [2021-06-05 04:25:53,011 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:53,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507431156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:53,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:25:53,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:25:53,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066121544] [2021-06-05 04:25:53,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:25:53,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:25:53,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:25:53,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:25:53,012 INFO L87 Difference]: Start difference. First operand 307 states and 860 transitions. Second operand has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:53,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:25:53,662 INFO L93 Difference]: Finished difference Result 349 states and 941 transitions. [2021-06-05 04:25:53,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:25:53,662 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:25:53,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:25:53,663 INFO L225 Difference]: With dead ends: 349 [2021-06-05 04:25:53,663 INFO L226 Difference]: Without dead ends: 346 [2021-06-05 04:25:53,663 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 801.4ms TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:25:53,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-06-05 04:25:53,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 307. [2021-06-05 04:25:53,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.810457516339869) internal successors, (860), 306 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:53,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 860 transitions. [2021-06-05 04:25:53,666 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 860 transitions. Word has length 16 [2021-06-05 04:25:53,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:25:53,666 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 860 transitions. [2021-06-05 04:25:53,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:53,666 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 860 transitions. [2021-06-05 04:25:53,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:25:53,667 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:25:53,667 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:25:53,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable924 [2021-06-05 04:25:53,867 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:25:53,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:25:53,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1998264330, now seen corresponding path program 138 times [2021-06-05 04:25:53,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:25:53,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547793972] [2021-06-05 04:25:53,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:25:53,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:25:54,239 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:54,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:25:54,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547793972] [2021-06-05 04:25:54,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547793972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:54,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456661557] [2021-06-05 04:25:54,240 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:54,271 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:25:54,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:25:54,272 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 04:25:54,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:25:54,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:54,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:54,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:54,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2021-06-05 04:25:54,726 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:54,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:54,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:54,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 29 [2021-06-05 04:25:54,733 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:54,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:54,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:54,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 04:25:54,741 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:54,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:54,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:54,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 29 [2021-06-05 04:25:54,746 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:54,762 INFO L628 ElimStorePlain]: treesize reduction 87, result has 14.7 percent of original size [2021-06-05 04:25:54,762 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:25:54,763 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:25:54,763 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:189, output treesize:11 [2021-06-05 04:25:54,790 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:54,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456661557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:54,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:25:54,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-06-05 04:25:54,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938119470] [2021-06-05 04:25:54,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:25:54,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:25:54,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:25:54,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:25:54,791 INFO L87 Difference]: Start difference. First operand 307 states and 860 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:55,256 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2021-06-05 04:25:55,475 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2021-06-05 04:25:55,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:25:55,654 INFO L93 Difference]: Finished difference Result 351 states and 930 transitions. [2021-06-05 04:25:55,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:25:55,654 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:25:55,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:25:55,655 INFO L225 Difference]: With dead ends: 351 [2021-06-05 04:25:55,655 INFO L226 Difference]: Without dead ends: 348 [2021-06-05 04:25:55,656 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1212.5ms TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:25:55,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-06-05 04:25:55,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 320. [2021-06-05 04:25:55,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 2.793103448275862) internal successors, (891), 319 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:55,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 891 transitions. [2021-06-05 04:25:55,660 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 891 transitions. Word has length 16 [2021-06-05 04:25:55,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:25:55,660 INFO L482 AbstractCegarLoop]: Abstraction has 320 states and 891 transitions. [2021-06-05 04:25:55,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:55,660 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 891 transitions. [2021-06-05 04:25:55,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:25:55,661 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:25:55,661 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:25:55,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable941 [2021-06-05 04:25:55,877 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:25:55,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:25:55,877 INFO L82 PathProgramCache]: Analyzing trace with hash 837242216, now seen corresponding path program 139 times [2021-06-05 04:25:55,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:25:55,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930004918] [2021-06-05 04:25:55,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:25:55,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:25:56,070 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:56,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:25:56,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930004918] [2021-06-05 04:25:56,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930004918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:56,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632255708] [2021-06-05 04:25:56,070 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:56,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:25:56,097 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 04:25:56,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:25:56,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:56,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:56,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:56,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-06-05 04:25:56,438 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:56,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:56,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:56,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 29 [2021-06-05 04:25:56,445 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:56,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:56,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:56,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 29 [2021-06-05 04:25:56,450 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:56,462 INFO L628 ElimStorePlain]: treesize reduction 72, result has 13.3 percent of original size [2021-06-05 04:25:56,462 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:25:56,462 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:25:56,462 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:149, output treesize:11 [2021-06-05 04:25:56,470 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:56,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632255708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:56,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:25:56,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-05 04:25:56,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296181674] [2021-06-05 04:25:56,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:25:56,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:25:56,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:25:56,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:25:56,471 INFO L87 Difference]: Start difference. First operand 320 states and 891 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:57,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:25:57,011 INFO L93 Difference]: Finished difference Result 409 states and 1057 transitions. [2021-06-05 04:25:57,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:25:57,011 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:25:57,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:25:57,012 INFO L225 Difference]: With dead ends: 409 [2021-06-05 04:25:57,012 INFO L226 Difference]: Without dead ends: 397 [2021-06-05 04:25:57,012 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 693.8ms TimeCoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:25:57,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-06-05 04:25:57,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 340. [2021-06-05 04:25:57,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 2.814159292035398) internal successors, (954), 339 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:57,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 954 transitions. [2021-06-05 04:25:57,015 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 954 transitions. Word has length 16 [2021-06-05 04:25:57,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:25:57,016 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 954 transitions. [2021-06-05 04:25:57,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:57,016 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 954 transitions. [2021-06-05 04:25:57,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:25:57,016 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:25:57,016 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:25:57,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable972 [2021-06-05 04:25:57,221 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:25:57,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:25:57,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1084614952, now seen corresponding path program 140 times [2021-06-05 04:25:57,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:25:57,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83139374] [2021-06-05 04:25:57,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:25:57,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:25:57,683 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:57,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:25:57,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83139374] [2021-06-05 04:25:57,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83139374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:57,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268776237] [2021-06-05 04:25:57,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:57,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:25:57,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:25:57,712 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 04:25:57,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:25:58,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:58,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:58,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:25:58,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:25:58,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-06-05 04:25:58,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:25:58,217 INFO L628 ElimStorePlain]: treesize reduction 121, result has 8.3 percent of original size [2021-06-05 04:25:58,217 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:25:58,217 INFO L518 ElimStorePlain]: Eliminatee v_prenex_78 vanished before elimination [2021-06-05 04:25:58,217 INFO L518 ElimStorePlain]: Eliminatee v_prenex_77 vanished before elimination [2021-06-05 04:25:58,218 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:25:58,218 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:161, output treesize:11 [2021-06-05 04:25:58,257 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:58,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268776237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:58,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:25:58,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-05 04:25:58,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927063377] [2021-06-05 04:25:58,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:25:58,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:25:58,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:25:58,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:25:58,258 INFO L87 Difference]: Start difference. First operand 340 states and 954 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:58,868 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 58 [2021-06-05 04:25:59,022 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2021-06-05 04:25:59,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:25:59,361 INFO L93 Difference]: Finished difference Result 396 states and 1057 transitions. [2021-06-05 04:25:59,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:25:59,361 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:25:59,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:25:59,362 INFO L225 Difference]: With dead ends: 396 [2021-06-05 04:25:59,362 INFO L226 Difference]: Without dead ends: 390 [2021-06-05 04:25:59,362 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1557.1ms TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:25:59,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-06-05 04:25:59,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 348. [2021-06-05 04:25:59,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 2.8184438040345823) internal successors, (978), 347 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:59,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 978 transitions. [2021-06-05 04:25:59,366 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 978 transitions. Word has length 16 [2021-06-05 04:25:59,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:25:59,366 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 978 transitions. [2021-06-05 04:25:59,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:25:59,366 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 978 transitions. [2021-06-05 04:25:59,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:25:59,370 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:25:59,370 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:25:59,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable993 [2021-06-05 04:25:59,570 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:25:59,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:25:59,571 INFO L82 PathProgramCache]: Analyzing trace with hash -425796252, now seen corresponding path program 141 times [2021-06-05 04:25:59,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:25:59,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144063682] [2021-06-05 04:25:59,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:25:59,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:25:59,911 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:25:59,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:25:59,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144063682] [2021-06-05 04:25:59,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144063682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:25:59,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368316316] [2021-06-05 04:25:59,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:25:59,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:25:59,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:25:59,942 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 04:25:59,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:26:00,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:00,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:00,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:00,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:00,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:00,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-06-05 04:26:00,378 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:00,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:00,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:00,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:00,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:00,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 35 [2021-06-05 04:26:00,385 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:00,397 INFO L628 ElimStorePlain]: treesize reduction 101, result has 9.8 percent of original size [2021-06-05 04:26:00,397 INFO L518 ElimStorePlain]: Eliminatee v_prenex_80 vanished before elimination [2021-06-05 04:26:00,397 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-05 04:26:00,397 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:26:00,397 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:26:00,397 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:173, output treesize:11 [2021-06-05 04:26:00,427 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:00,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368316316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:00,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:26:00,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 04:26:00,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424183416] [2021-06-05 04:26:00,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:26:00,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:26:00,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:26:00,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:26:00,428 INFO L87 Difference]: Start difference. First operand 348 states and 978 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:01,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:26:01,256 INFO L93 Difference]: Finished difference Result 395 states and 1079 transitions. [2021-06-05 04:26:01,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:26:01,257 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:26:01,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:26:01,257 INFO L225 Difference]: With dead ends: 395 [2021-06-05 04:26:01,257 INFO L226 Difference]: Without dead ends: 392 [2021-06-05 04:26:01,257 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1233.6ms TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:26:01,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-06-05 04:26:01,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 354. [2021-06-05 04:26:01,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 2.8158640226628897) internal successors, (994), 353 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:01,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 994 transitions. [2021-06-05 04:26:01,262 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 994 transitions. Word has length 16 [2021-06-05 04:26:01,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:26:01,262 INFO L482 AbstractCegarLoop]: Abstraction has 354 states and 994 transitions. [2021-06-05 04:26:01,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:01,262 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 994 transitions. [2021-06-05 04:26:01,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:26:01,263 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:26:01,263 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:26:01,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1009,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:26:01,477 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:26:01,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:26:01,477 INFO L82 PathProgramCache]: Analyzing trace with hash -3903320, now seen corresponding path program 142 times [2021-06-05 04:26:01,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:26:01,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336002926] [2021-06-05 04:26:01,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:26:01,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:26:01,631 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:01,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:26:01,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336002926] [2021-06-05 04:26:01,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336002926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:01,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240795929] [2021-06-05 04:26:01,632 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:26:01,668 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:26:01,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:26:01,673 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 04:26:01,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:26:02,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:02,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:02,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:02,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:02,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:02,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-06-05 04:26:02,150 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:02,168 INFO L628 ElimStorePlain]: treesize reduction 129, result has 7.9 percent of original size [2021-06-05 04:26:02,168 INFO L518 ElimStorePlain]: Eliminatee v_prenex_86 vanished before elimination [2021-06-05 04:26:02,168 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:26:02,168 INFO L518 ElimStorePlain]: Eliminatee v_prenex_85 vanished before elimination [2021-06-05 04:26:02,169 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:26:02,169 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:173, output treesize:11 [2021-06-05 04:26:02,178 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:02,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240795929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:02,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:26:02,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:26:02,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453047184] [2021-06-05 04:26:02,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:26:02,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:26:02,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:26:02,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:26:02,179 INFO L87 Difference]: Start difference. First operand 354 states and 994 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:02,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:26:02,691 INFO L93 Difference]: Finished difference Result 454 states and 1186 transitions. [2021-06-05 04:26:02,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:26:02,691 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:26:02,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:26:02,692 INFO L225 Difference]: With dead ends: 454 [2021-06-05 04:26:02,692 INFO L226 Difference]: Without dead ends: 451 [2021-06-05 04:26:02,692 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 737.7ms TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:26:02,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-06-05 04:26:02,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 379. [2021-06-05 04:26:02,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 2.8439153439153437) internal successors, (1075), 378 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:02,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 1075 transitions. [2021-06-05 04:26:02,696 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 1075 transitions. Word has length 16 [2021-06-05 04:26:02,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:26:02,696 INFO L482 AbstractCegarLoop]: Abstraction has 379 states and 1075 transitions. [2021-06-05 04:26:02,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:02,696 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 1075 transitions. [2021-06-05 04:26:02,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:26:02,696 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:26:02,697 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:26:02,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1026 [2021-06-05 04:26:02,897 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:26:02,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:26:02,897 INFO L82 PathProgramCache]: Analyzing trace with hash 439009666, now seen corresponding path program 143 times [2021-06-05 04:26:02,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:26:02,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677257343] [2021-06-05 04:26:02,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:26:02,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:26:03,283 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:03,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:26:03,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677257343] [2021-06-05 04:26:03,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677257343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:03,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734048928] [2021-06-05 04:26:03,283 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:26:03,311 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:26:03,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:26:03,312 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 04:26:03,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:26:03,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:03,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:03,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:03,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:03,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-06-05 04:26:03,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:03,811 INFO L628 ElimStorePlain]: treesize reduction 129, result has 7.9 percent of original size [2021-06-05 04:26:03,811 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-05 04:26:03,811 INFO L518 ElimStorePlain]: Eliminatee v_prenex_91 vanished before elimination [2021-06-05 04:26:03,811 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:26:03,812 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:26:03,812 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:173, output treesize:11 [2021-06-05 04:26:03,843 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:03,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734048928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:03,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:26:03,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 04:26:03,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553821333] [2021-06-05 04:26:03,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:26:03,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:26:03,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:26:03,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:26:03,844 INFO L87 Difference]: Start difference. First operand 379 states and 1075 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:04,522 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-06-05 04:26:04,715 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2021-06-05 04:26:04,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:26:04,849 INFO L93 Difference]: Finished difference Result 574 states and 1593 transitions. [2021-06-05 04:26:04,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:26:04,849 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:26:04,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:26:04,850 INFO L225 Difference]: With dead ends: 574 [2021-06-05 04:26:04,850 INFO L226 Difference]: Without dead ends: 571 [2021-06-05 04:26:04,850 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 1455.7ms TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:26:04,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-06-05 04:26:04,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 384. [2021-06-05 04:26:04,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 2.8407310704960835) internal successors, (1088), 383 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:04,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1088 transitions. [2021-06-05 04:26:04,855 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1088 transitions. Word has length 16 [2021-06-05 04:26:04,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:26:04,855 INFO L482 AbstractCegarLoop]: Abstraction has 384 states and 1088 transitions. [2021-06-05 04:26:04,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:04,855 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1088 transitions. [2021-06-05 04:26:04,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:26:04,856 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:26:04,856 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:26:05,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1042,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:26:05,073 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:26:05,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:26:05,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1213943708, now seen corresponding path program 144 times [2021-06-05 04:26:05,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:26:05,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316538992] [2021-06-05 04:26:05,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:26:05,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:26:05,514 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:05,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:26:05,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316538992] [2021-06-05 04:26:05,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316538992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:05,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356239859] [2021-06-05 04:26:05,514 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:26:05,548 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:26:05,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:26:05,549 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 04:26:05,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:26:06,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:06,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:06,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:06,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:06,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:06,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-06-05 04:26:06,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:06,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:06,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:06,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:06,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:06,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-06-05 04:26:06,034 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:06,075 INFO L628 ElimStorePlain]: treesize reduction 80, result has 47.0 percent of original size [2021-06-05 04:26:06,075 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:26:06,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:06,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:06,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:06,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:06,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 35 [2021-06-05 04:26:06,081 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:06,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:26:06,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:06,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 04:26:06,094 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:06,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:26:06,105 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:26:06,105 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:213, output treesize:22 [2021-06-05 04:26:06,142 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:06,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356239859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:06,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:26:06,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-05 04:26:06,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148141948] [2021-06-05 04:26:06,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:26:06,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:26:06,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:26:06,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:26:06,142 INFO L87 Difference]: Start difference. First operand 384 states and 1088 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:06,692 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2021-06-05 04:26:07,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:26:07,151 INFO L93 Difference]: Finished difference Result 456 states and 1250 transitions. [2021-06-05 04:26:07,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:26:07,151 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:26:07,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:26:07,152 INFO L225 Difference]: With dead ends: 456 [2021-06-05 04:26:07,152 INFO L226 Difference]: Without dead ends: 450 [2021-06-05 04:26:07,152 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1372.1ms TimeCoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:26:07,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-06-05 04:26:07,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 384. [2021-06-05 04:26:07,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 2.8407310704960835) internal successors, (1088), 383 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:07,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1088 transitions. [2021-06-05 04:26:07,157 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1088 transitions. Word has length 16 [2021-06-05 04:26:07,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:26:07,157 INFO L482 AbstractCegarLoop]: Abstraction has 384 states and 1088 transitions. [2021-06-05 04:26:07,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:07,157 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1088 transitions. [2021-06-05 04:26:07,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:26:07,157 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:26:07,157 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:26:07,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1058 [2021-06-05 04:26:07,358 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:26:07,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:26:07,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1920001474, now seen corresponding path program 145 times [2021-06-05 04:26:07,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:26:07,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101674957] [2021-06-05 04:26:07,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:26:07,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:26:07,724 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:07,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:26:07,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101674957] [2021-06-05 04:26:07,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101674957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:07,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390548038] [2021-06-05 04:26:07,724 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:26:07,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:26:07,758 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 04:26:07,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:26:08,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:08,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:08,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:08,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:08,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:08,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:08,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:08,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-06-05 04:26:08,273 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:08,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:08,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:08,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:08,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:08,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:08,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:08,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 35 [2021-06-05 04:26:08,281 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:08,293 INFO L628 ElimStorePlain]: treesize reduction 105, result has 9.5 percent of original size [2021-06-05 04:26:08,293 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:26:08,294 INFO L518 ElimStorePlain]: Eliminatee v_prenex_105 vanished before elimination [2021-06-05 04:26:08,294 INFO L518 ElimStorePlain]: Eliminatee v_prenex_106 vanished before elimination [2021-06-05 04:26:08,294 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:26:08,294 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:173, output treesize:11 [2021-06-05 04:26:08,319 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:08,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390548038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:08,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:26:08,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 04:26:08,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171842155] [2021-06-05 04:26:08,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:26:08,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:26:08,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:26:08,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:26:08,320 INFO L87 Difference]: Start difference. First operand 384 states and 1088 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:09,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:26:09,263 INFO L93 Difference]: Finished difference Result 466 states and 1272 transitions. [2021-06-05 04:26:09,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:26:09,264 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:26:09,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:26:09,264 INFO L225 Difference]: With dead ends: 466 [2021-06-05 04:26:09,264 INFO L226 Difference]: Without dead ends: 457 [2021-06-05 04:26:09,265 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1409.7ms TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:26:09,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-06-05 04:26:09,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 389. [2021-06-05 04:26:09,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 2.8376288659793816) internal successors, (1101), 388 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:09,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 1101 transitions. [2021-06-05 04:26:09,269 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 1101 transitions. Word has length 16 [2021-06-05 04:26:09,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:26:09,269 INFO L482 AbstractCegarLoop]: Abstraction has 389 states and 1101 transitions. [2021-06-05 04:26:09,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:09,269 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 1101 transitions. [2021-06-05 04:26:09,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:26:09,269 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:26:09,269 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:26:09,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1073 [2021-06-05 04:26:09,492 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:26:09,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:26:09,492 INFO L82 PathProgramCache]: Analyzing trace with hash -2135323484, now seen corresponding path program 146 times [2021-06-05 04:26:09,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:26:09,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085497192] [2021-06-05 04:26:09,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:26:09,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:26:09,765 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:09,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:26:09,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085497192] [2021-06-05 04:26:09,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085497192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:09,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993650598] [2021-06-05 04:26:09,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:26:09,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:26:09,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:26:09,793 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 04:26:09,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:26:10,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:10,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:10,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:10,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:10,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:10,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:10,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-06-05 04:26:10,301 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:10,318 INFO L628 ElimStorePlain]: treesize reduction 133, result has 7.6 percent of original size [2021-06-05 04:26:10,318 INFO L518 ElimStorePlain]: Eliminatee v_prenex_109 vanished before elimination [2021-06-05 04:26:10,318 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-05 04:26:10,318 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:26:10,319 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:26:10,319 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:173, output treesize:11 [2021-06-05 04:26:10,343 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:10,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993650598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:10,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:26:10,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 04:26:10,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37704464] [2021-06-05 04:26:10,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:26:10,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:26:10,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:26:10,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:26:10,344 INFO L87 Difference]: Start difference. First operand 389 states and 1101 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:11,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:26:11,225 INFO L93 Difference]: Finished difference Result 505 states and 1344 transitions. [2021-06-05 04:26:11,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:26:11,225 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:26:11,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:26:11,226 INFO L225 Difference]: With dead ends: 505 [2021-06-05 04:26:11,226 INFO L226 Difference]: Without dead ends: 501 [2021-06-05 04:26:11,226 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1275.0ms TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:26:11,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-06-05 04:26:11,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 403. [2021-06-05 04:26:11,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.853233830845771) internal successors, (1147), 402 states have internal predecessors, (1147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:11,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1147 transitions. [2021-06-05 04:26:11,230 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1147 transitions. Word has length 16 [2021-06-05 04:26:11,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:26:11,230 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 1147 transitions. [2021-06-05 04:26:11,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:11,230 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1147 transitions. [2021-06-05 04:26:11,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:26:11,231 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:26:11,231 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:26:11,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1088 [2021-06-05 04:26:11,431 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:26:11,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:26:11,431 INFO L82 PathProgramCache]: Analyzing trace with hash -2127593086, now seen corresponding path program 147 times [2021-06-05 04:26:11,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:26:11,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915386665] [2021-06-05 04:26:11,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:26:11,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:26:11,705 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:11,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:26:11,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915386665] [2021-06-05 04:26:11,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915386665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:11,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214700155] [2021-06-05 04:26:11,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:26:11,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:26:11,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:26:11,733 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 04:26:11,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:26:12,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:12,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:12,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:12,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:12,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:12,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 39 [2021-06-05 04:26:12,111 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:12,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:12,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:12,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:12,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:12,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:12,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-06-05 04:26:12,120 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:12,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:12,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:12,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:12,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:12,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:12,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 23 [2021-06-05 04:26:12,131 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:12,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:12,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:12,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:12,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:12,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-06-05 04:26:12,138 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:12,194 INFO L628 ElimStorePlain]: treesize reduction 95, result has 39.9 percent of original size [2021-06-05 04:26:12,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:12,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:26:12,198 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:26:12,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:26:12,220 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:26:12,220 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:265, output treesize:58 [2021-06-05 04:26:12,306 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:12,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214700155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:12,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:26:12,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:26:12,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495077219] [2021-06-05 04:26:12,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:26:12,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:26:12,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:26:12,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:26:12,307 INFO L87 Difference]: Start difference. First operand 403 states and 1147 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:13,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:26:13,292 INFO L93 Difference]: Finished difference Result 553 states and 1482 transitions. [2021-06-05 04:26:13,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:26:13,293 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:26:13,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:26:13,293 INFO L225 Difference]: With dead ends: 553 [2021-06-05 04:26:13,293 INFO L226 Difference]: Without dead ends: 546 [2021-06-05 04:26:13,294 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1261.0ms TimeCoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:26:13,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-06-05 04:26:13,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 427. [2021-06-05 04:26:13,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 2.887323943661972) internal successors, (1230), 426 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:13,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 1230 transitions. [2021-06-05 04:26:13,298 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 1230 transitions. Word has length 16 [2021-06-05 04:26:13,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:26:13,298 INFO L482 AbstractCegarLoop]: Abstraction has 427 states and 1230 transitions. [2021-06-05 04:26:13,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:13,298 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 1230 transitions. [2021-06-05 04:26:13,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:26:13,299 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:26:13,299 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:26:13,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1107 [2021-06-05 04:26:13,499 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:26:13,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:26:13,500 INFO L82 PathProgramCache]: Analyzing trace with hash -328145428, now seen corresponding path program 148 times [2021-06-05 04:26:13,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:26:13,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869262308] [2021-06-05 04:26:13,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:26:13,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:26:13,942 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:13,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:26:13,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869262308] [2021-06-05 04:26:13,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869262308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:13,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943712869] [2021-06-05 04:26:13,943 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:26:13,969 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:26:13,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:26:13,970 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 04:26:13,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:26:14,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:14,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:14,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:14,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:14,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:14,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-06-05 04:26:14,580 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:14,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:14,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:14,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:14,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:14,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 35 [2021-06-05 04:26:14,586 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:14,626 INFO L628 ElimStorePlain]: treesize reduction 84, result has 46.2 percent of original size [2021-06-05 04:26:14,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:14,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 04:26:14,629 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:14,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:26:14,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:14,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:14,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:14,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2021-06-05 04:26:14,649 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:14,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:26:14,659 INFO L518 ElimStorePlain]: Eliminatee v_prenex_116 vanished before elimination [2021-06-05 04:26:14,660 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:26:14,660 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:213, output treesize:22 [2021-06-05 04:26:14,696 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:14,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943712869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:14,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:26:14,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-05 04:26:14,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194706632] [2021-06-05 04:26:14,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:26:14,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:26:14,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:26:14,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:26:14,697 INFO L87 Difference]: Start difference. First operand 427 states and 1230 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:15,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:26:15,738 INFO L93 Difference]: Finished difference Result 468 states and 1314 transitions. [2021-06-05 04:26:15,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:26:15,739 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:26:15,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:26:15,739 INFO L225 Difference]: With dead ends: 468 [2021-06-05 04:26:15,739 INFO L226 Difference]: Without dead ends: 465 [2021-06-05 04:26:15,739 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1547.0ms TimeCoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:26:15,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-06-05 04:26:15,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 427. [2021-06-05 04:26:15,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 2.887323943661972) internal successors, (1230), 426 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:15,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 1230 transitions. [2021-06-05 04:26:15,745 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 1230 transitions. Word has length 16 [2021-06-05 04:26:15,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:26:15,745 INFO L482 AbstractCegarLoop]: Abstraction has 427 states and 1230 transitions. [2021-06-05 04:26:15,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:15,745 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 1230 transitions. [2021-06-05 04:26:15,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:26:15,746 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:26:15,746 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:26:15,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1117,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:26:15,968 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:26:15,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:26:15,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1249525204, now seen corresponding path program 149 times [2021-06-05 04:26:15,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:26:15,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457295697] [2021-06-05 04:26:15,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:26:15,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:26:16,352 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 42 [2021-06-05 04:26:16,500 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:16,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:26:16,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457295697] [2021-06-05 04:26:16,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457295697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:16,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169730122] [2021-06-05 04:26:16,501 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:26:16,528 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:26:16,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:26:16,529 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 04:26:16,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:26:17,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:17,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:17,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:17,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:17,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-06-05 04:26:17,041 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:17,059 INFO L628 ElimStorePlain]: treesize reduction 133, result has 7.6 percent of original size [2021-06-05 04:26:17,059 INFO L518 ElimStorePlain]: Eliminatee v_prenex_119 vanished before elimination [2021-06-05 04:26:17,059 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-05 04:26:17,059 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:26:17,059 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:26:17,059 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:173, output treesize:11 [2021-06-05 04:26:17,086 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:17,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169730122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:17,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:26:17,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-05 04:26:17,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850890236] [2021-06-05 04:26:17,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:26:17,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:26:17,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:26:17,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:26:17,087 INFO L87 Difference]: Start difference. First operand 427 states and 1230 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:17,376 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2021-06-05 04:26:18,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:26:18,163 INFO L93 Difference]: Finished difference Result 507 states and 1380 transitions. [2021-06-05 04:26:18,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:26:18,164 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:26:18,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:26:18,165 INFO L225 Difference]: With dead ends: 507 [2021-06-05 04:26:18,165 INFO L226 Difference]: Without dead ends: 501 [2021-06-05 04:26:18,165 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 1673.6ms TimeCoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:26:18,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-06-05 04:26:18,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 428. [2021-06-05 04:26:18,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 2.88056206088993) internal successors, (1230), 427 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:18,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 1230 transitions. [2021-06-05 04:26:18,169 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 1230 transitions. Word has length 16 [2021-06-05 04:26:18,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:26:18,169 INFO L482 AbstractCegarLoop]: Abstraction has 428 states and 1230 transitions. [2021-06-05 04:26:18,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:18,169 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 1230 transitions. [2021-06-05 04:26:18,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:26:18,170 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:26:18,170 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:26:18,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1135,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:26:18,370 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:26:18,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:26:18,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1241794806, now seen corresponding path program 150 times [2021-06-05 04:26:18,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:26:18,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403888973] [2021-06-05 04:26:18,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:26:18,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:26:18,543 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:18,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:26:18,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403888973] [2021-06-05 04:26:18,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403888973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:18,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517508776] [2021-06-05 04:26:18,543 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:26:18,571 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:26:18,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:26:18,572 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 04:26:18,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:26:19,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:19,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:19,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:19,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:19,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:19,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2021-06-05 04:26:19,064 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:19,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:19,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:19,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:19,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:19,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:19,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-06-05 04:26:19,076 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:19,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:19,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:19,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:19,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:19,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-06-05 04:26:19,083 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:19,098 INFO L628 ElimStorePlain]: treesize reduction 66, result has 14.3 percent of original size [2021-06-05 04:26:19,098 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:26:19,099 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:26:19,099 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:161, output treesize:11 [2021-06-05 04:26:19,128 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:19,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517508776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:19,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:26:19,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 04:26:19,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320724791] [2021-06-05 04:26:19,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:26:19,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:26:19,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:26:19,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:26:19,129 INFO L87 Difference]: Start difference. First operand 428 states and 1230 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:19,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:26:19,695 INFO L93 Difference]: Finished difference Result 545 states and 1456 transitions. [2021-06-05 04:26:19,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:26:19,695 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:26:19,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:26:19,696 INFO L225 Difference]: With dead ends: 545 [2021-06-05 04:26:19,696 INFO L226 Difference]: Without dead ends: 541 [2021-06-05 04:26:19,696 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 804.5ms TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:26:19,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-06-05 04:26:19,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 426. [2021-06-05 04:26:19,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 2.8823529411764706) internal successors, (1225), 425 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:19,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 1225 transitions. [2021-06-05 04:26:19,703 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 1225 transitions. Word has length 16 [2021-06-05 04:26:19,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:26:19,703 INFO L482 AbstractCegarLoop]: Abstraction has 426 states and 1225 transitions. [2021-06-05 04:26:19,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:19,703 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 1225 transitions. [2021-06-05 04:26:19,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:26:19,704 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:26:19,704 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:26:19,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1153,155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:26:19,917 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:26:19,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:26:19,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1711708166, now seen corresponding path program 151 times [2021-06-05 04:26:19,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:26:19,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501532958] [2021-06-05 04:26:19,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:26:19,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:26:20,208 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:20,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:26:20,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501532958] [2021-06-05 04:26:20,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501532958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:20,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541539578] [2021-06-05 04:26:20,209 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:26:20,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:26:20,251 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 04:26:20,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:26:20,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:20,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:20,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:20,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:20,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:20,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 35 [2021-06-05 04:26:20,813 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:20,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:20,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:20,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:20,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:20,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-06-05 04:26:20,820 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:20,831 INFO L628 ElimStorePlain]: treesize reduction 99, result has 10.0 percent of original size [2021-06-05 04:26:20,832 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:26:20,832 INFO L518 ElimStorePlain]: Eliminatee v_prenex_123 vanished before elimination [2021-06-05 04:26:20,832 INFO L518 ElimStorePlain]: Eliminatee v_prenex_124 vanished before elimination [2021-06-05 04:26:20,832 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:26:20,832 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:173, output treesize:11 [2021-06-05 04:26:20,840 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:20,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541539578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:20,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:26:20,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-05 04:26:20,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745979493] [2021-06-05 04:26:20,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:26:20,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:26:20,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:26:20,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:26:20,841 INFO L87 Difference]: Start difference. First operand 426 states and 1225 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:21,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:26:21,378 INFO L93 Difference]: Finished difference Result 489 states and 1343 transitions. [2021-06-05 04:26:21,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:26:21,379 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:26:21,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:26:21,379 INFO L225 Difference]: With dead ends: 489 [2021-06-05 04:26:21,380 INFO L226 Difference]: Without dead ends: 481 [2021-06-05 04:26:21,380 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1009.4ms TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:26:21,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-06-05 04:26:21,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 429. [2021-06-05 04:26:21,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 2.8621495327102804) internal successors, (1225), 428 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:21,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1225 transitions. [2021-06-05 04:26:21,384 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1225 transitions. Word has length 16 [2021-06-05 04:26:21,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:26:21,384 INFO L482 AbstractCegarLoop]: Abstraction has 429 states and 1225 transitions. [2021-06-05 04:26:21,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:21,384 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1225 transitions. [2021-06-05 04:26:21,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:26:21,385 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:26:21,385 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:26:21,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1175,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:26:21,585 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:26:21,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:26:21,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1270531412, now seen corresponding path program 152 times [2021-06-05 04:26:21,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:26:21,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293638343] [2021-06-05 04:26:21,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:26:21,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:26:21,777 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:21,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:26:21,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293638343] [2021-06-05 04:26:21,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293638343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:21,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669363138] [2021-06-05 04:26:21,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:26:21,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:26:21,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:26:21,805 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 04:26:21,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:26:22,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:22,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:22,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:22,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:22,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:22,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-06-05 04:26:22,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:22,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:22,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:22,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:22,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:22,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2021-06-05 04:26:22,361 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:22,375 INFO L628 ElimStorePlain]: treesize reduction 91, result has 10.8 percent of original size [2021-06-05 04:26:22,375 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:26:22,375 INFO L518 ElimStorePlain]: Eliminatee v_prenex_126 vanished before elimination [2021-06-05 04:26:22,375 INFO L518 ElimStorePlain]: Eliminatee v_prenex_127 vanished before elimination [2021-06-05 04:26:22,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:26:22,375 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:161, output treesize:11 [2021-06-05 04:26:22,398 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:22,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669363138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:22,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:26:22,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 04:26:22,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119311593] [2021-06-05 04:26:22,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:26:22,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:26:22,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:26:22,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:26:22,399 INFO L87 Difference]: Start difference. First operand 429 states and 1225 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:23,055 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-06-05 04:26:23,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:26:23,148 INFO L93 Difference]: Finished difference Result 495 states and 1336 transitions. [2021-06-05 04:26:23,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:26:23,149 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:26:23,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:26:23,149 INFO L225 Difference]: With dead ends: 495 [2021-06-05 04:26:23,149 INFO L226 Difference]: Without dead ends: 489 [2021-06-05 04:26:23,150 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1110.8ms TimeCoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:26:23,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-06-05 04:26:23,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 428. [2021-06-05 04:26:23,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 2.857142857142857) internal successors, (1220), 427 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:23,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 1220 transitions. [2021-06-05 04:26:23,154 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 1220 transitions. Word has length 16 [2021-06-05 04:26:23,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:26:23,154 INFO L482 AbstractCegarLoop]: Abstraction has 428 states and 1220 transitions. [2021-06-05 04:26:23,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:23,154 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 1220 transitions. [2021-06-05 04:26:23,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:26:23,155 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:26:23,155 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:26:23,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1191,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:26:23,355 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:26:23,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:26:23,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1542761286, now seen corresponding path program 153 times [2021-06-05 04:26:23,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:26:23,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222384484] [2021-06-05 04:26:23,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:26:23,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:26:23,946 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:23,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:26:23,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222384484] [2021-06-05 04:26:23,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222384484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:23,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179959836] [2021-06-05 04:26:23,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:26:23,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:26:23,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:26:23,975 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 04:26:23,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:26:24,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:24,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:24,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 04:26:24,472 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:24,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:24,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:24,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 29 [2021-06-05 04:26:24,479 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:24,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:24,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:24,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-06-05 04:26:24,486 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:24,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:24,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 29 [2021-06-05 04:26:24,490 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:24,518 INFO L628 ElimStorePlain]: treesize reduction 51, result has 50.0 percent of original size [2021-06-05 04:26:24,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:24,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 04:26:24,521 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:24,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:26:24,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:26:24,533 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 5 variables, input treesize:189, output treesize:22 [2021-06-05 04:26:24,569 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:24,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179959836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:24,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:26:24,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-05 04:26:24,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762537945] [2021-06-05 04:26:24,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:26:24,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:26:24,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:26:24,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:26:24,570 INFO L87 Difference]: Start difference. First operand 428 states and 1220 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:25,036 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 58 [2021-06-05 04:26:25,393 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 52 [2021-06-05 04:26:25,538 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-06-05 04:26:26,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:26:26,551 INFO L93 Difference]: Finished difference Result 492 states and 1349 transitions. [2021-06-05 04:26:26,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:26:26,551 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:26:26,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:26:26,552 INFO L225 Difference]: With dead ends: 492 [2021-06-05 04:26:26,552 INFO L226 Difference]: Without dead ends: 486 [2021-06-05 04:26:26,552 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 2551.9ms TimeCoverageRelationStatistics Valid=162, Invalid=1098, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 04:26:26,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-06-05 04:26:26,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 432. [2021-06-05 04:26:26,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 2.8538283062645013) internal successors, (1230), 431 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:26,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1230 transitions. [2021-06-05 04:26:26,557 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1230 transitions. Word has length 16 [2021-06-05 04:26:26,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:26:26,557 INFO L482 AbstractCegarLoop]: Abstraction has 432 states and 1230 transitions. [2021-06-05 04:26:26,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:26,557 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1230 transitions. [2021-06-05 04:26:26,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:26:26,557 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:26:26,557 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:26:26,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1210 [2021-06-05 04:26:26,760 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:26:26,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:26:26,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1361797476, now seen corresponding path program 154 times [2021-06-05 04:26:26,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:26:26,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904099001] [2021-06-05 04:26:26,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:26:26,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:26:27,170 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:27,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:26:27,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904099001] [2021-06-05 04:26:27,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904099001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:27,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040155020] [2021-06-05 04:26:27,170 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:26:27,197 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:26:27,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:26:27,197 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 04:26:27,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:26:27,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:27,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:27,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:27,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:27,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:27,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-06-05 04:26:27,670 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:27,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:27,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:27,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:27,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:27,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-06-05 04:26:27,679 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:27,722 INFO L628 ElimStorePlain]: treesize reduction 84, result has 45.8 percent of original size [2021-06-05 04:26:27,722 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:26:27,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:27,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:27,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:27,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:27,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:27,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:27,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 35 [2021-06-05 04:26:27,729 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:27,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:26:27,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:27,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:26:27,748 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:26:27,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:26:27,759 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:26:27,759 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:213, output treesize:22 [2021-06-05 04:26:27,794 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:27,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040155020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:27,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:26:27,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-05 04:26:27,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258371879] [2021-06-05 04:26:27,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:26:27,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:26:27,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:26:27,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:26:27,795 INFO L87 Difference]: Start difference. First operand 432 states and 1230 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:28,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:26:28,727 INFO L93 Difference]: Finished difference Result 460 states and 1282 transitions. [2021-06-05 04:26:28,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:26:28,727 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:26:28,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:26:28,727 INFO L225 Difference]: With dead ends: 460 [2021-06-05 04:26:28,727 INFO L226 Difference]: Without dead ends: 457 [2021-06-05 04:26:28,728 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1339.9ms TimeCoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:26:28,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-06-05 04:26:28,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 433. [2021-06-05 04:26:28,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 2.8541666666666665) internal successors, (1233), 432 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:28,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1233 transitions. [2021-06-05 04:26:28,734 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1233 transitions. Word has length 16 [2021-06-05 04:26:28,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:26:28,734 INFO L482 AbstractCegarLoop]: Abstraction has 433 states and 1233 transitions. [2021-06-05 04:26:28,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:28,734 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1233 transitions. [2021-06-05 04:26:28,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:26:28,735 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:26:28,735 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:26:28,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1230,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:26:28,953 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:26:28,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:26:28,953 INFO L82 PathProgramCache]: Analyzing trace with hash 200775362, now seen corresponding path program 155 times [2021-06-05 04:26:28,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:26:28,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473799548] [2021-06-05 04:26:28,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:26:28,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:26:29,165 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:29,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:26:29,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473799548] [2021-06-05 04:26:29,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473799548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:29,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300150113] [2021-06-05 04:26:29,165 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:26:29,201 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:26:29,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:26:29,202 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 04:26:29,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:26:29,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:29,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:29,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:29,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:29,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:29,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:29,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-06-05 04:26:29,596 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:29,612 INFO L628 ElimStorePlain]: treesize reduction 133, result has 7.6 percent of original size [2021-06-05 04:26:29,612 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:26:29,612 INFO L518 ElimStorePlain]: Eliminatee v_prenex_137 vanished before elimination [2021-06-05 04:26:29,612 INFO L518 ElimStorePlain]: Eliminatee v_prenex_138 vanished before elimination [2021-06-05 04:26:29,613 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:26:29,613 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:173, output treesize:11 [2021-06-05 04:26:29,621 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:29,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300150113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:29,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:26:29,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-05 04:26:29,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094360799] [2021-06-05 04:26:29,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:26:29,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:26:29,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:26:29,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:26:29,622 INFO L87 Difference]: Start difference. First operand 433 states and 1233 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:30,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:26:30,066 INFO L93 Difference]: Finished difference Result 531 states and 1427 transitions. [2021-06-05 04:26:30,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:26:30,066 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:26:30,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:26:30,067 INFO L225 Difference]: With dead ends: 531 [2021-06-05 04:26:30,067 INFO L226 Difference]: Without dead ends: 520 [2021-06-05 04:26:30,067 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 735.1ms TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:26:30,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-06-05 04:26:30,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 424. [2021-06-05 04:26:30,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 2.8747044917257685) internal successors, (1216), 423 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:30,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 1216 transitions. [2021-06-05 04:26:30,072 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 1216 transitions. Word has length 16 [2021-06-05 04:26:30,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:26:30,072 INFO L482 AbstractCegarLoop]: Abstraction has 424 states and 1216 transitions. [2021-06-05 04:26:30,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:30,072 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 1216 transitions. [2021-06-05 04:26:30,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:26:30,072 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:26:30,073 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:26:30,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1251,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:26:30,273 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:26:30,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:26:30,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1062263106, now seen corresponding path program 156 times [2021-06-05 04:26:30,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:26:30,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216024112] [2021-06-05 04:26:30,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:26:30,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:26:30,576 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:30,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:26:30,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216024112] [2021-06-05 04:26:30,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216024112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:30,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270349094] [2021-06-05 04:26:30,576 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:26:30,603 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:26:30,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:26:30,604 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 04:26:30,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:26:30,863 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-06-05 04:26:31,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:31,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:31,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 29 [2021-06-05 04:26:31,147 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:31,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:31,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:31,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2021-06-05 04:26:31,156 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:31,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:31,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:31,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 29 [2021-06-05 04:26:31,174 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:31,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:31,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 04:26:31,180 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:31,201 INFO L628 ElimStorePlain]: treesize reduction 83, result has 15.3 percent of original size [2021-06-05 04:26:31,201 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:26:31,202 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:26:31,202 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:189, output treesize:11 [2021-06-05 04:26:31,240 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:31,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270349094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:31,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:26:31,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 04:26:31,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157982082] [2021-06-05 04:26:31,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:26:31,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:26:31,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:26:31,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:26:31,241 INFO L87 Difference]: Start difference. First operand 424 states and 1216 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:32,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:26:32,281 INFO L93 Difference]: Finished difference Result 466 states and 1300 transitions. [2021-06-05 04:26:32,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:26:32,281 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:26:32,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:26:32,281 INFO L225 Difference]: With dead ends: 466 [2021-06-05 04:26:32,282 INFO L226 Difference]: Without dead ends: 463 [2021-06-05 04:26:32,282 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1430.4ms TimeCoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:26:32,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-06-05 04:26:32,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 423. [2021-06-05 04:26:32,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 2.876777251184834) internal successors, (1214), 422 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:32,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 1214 transitions. [2021-06-05 04:26:32,286 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 1214 transitions. Word has length 16 [2021-06-05 04:26:32,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:26:32,286 INFO L482 AbstractCegarLoop]: Abstraction has 423 states and 1214 transitions. [2021-06-05 04:26:32,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:32,286 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 1214 transitions. [2021-06-05 04:26:32,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:26:32,286 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:26:32,287 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:26:32,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1267 [2021-06-05 04:26:32,487 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:26:32,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:26:32,487 INFO L82 PathProgramCache]: Analyzing trace with hash -450417086, now seen corresponding path program 157 times [2021-06-05 04:26:32,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:26:32,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826936544] [2021-06-05 04:26:32,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:26:32,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:26:32,748 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:32,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:26:32,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826936544] [2021-06-05 04:26:32,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826936544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:32,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784493349] [2021-06-05 04:26:32,748 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:26:32,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:26:32,775 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 04:26:32,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:26:33,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:33,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:33,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:33,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:33,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:33,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:33,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-06-05 04:26:33,227 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:33,243 INFO L628 ElimStorePlain]: treesize reduction 133, result has 7.6 percent of original size [2021-06-05 04:26:33,243 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:26:33,243 INFO L518 ElimStorePlain]: Eliminatee v_prenex_141 vanished before elimination [2021-06-05 04:26:33,243 INFO L518 ElimStorePlain]: Eliminatee v_prenex_142 vanished before elimination [2021-06-05 04:26:33,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:26:33,244 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:173, output treesize:11 [2021-06-05 04:26:33,266 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:33,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784493349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:33,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:26:33,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 04:26:33,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038194555] [2021-06-05 04:26:33,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:26:33,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:26:33,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:26:33,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:26:33,267 INFO L87 Difference]: Start difference. First operand 423 states and 1214 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:33,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:26:33,691 INFO L93 Difference]: Finished difference Result 506 states and 1376 transitions. [2021-06-05 04:26:33,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:26:33,692 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:26:33,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:26:33,692 INFO L225 Difference]: With dead ends: 506 [2021-06-05 04:26:33,692 INFO L226 Difference]: Without dead ends: 500 [2021-06-05 04:26:33,692 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 793.4ms TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:26:33,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-06-05 04:26:33,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 434. [2021-06-05 04:26:33,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 2.884526558891455) internal successors, (1249), 433 states have internal predecessors, (1249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:33,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 1249 transitions. [2021-06-05 04:26:33,697 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 1249 transitions. Word has length 16 [2021-06-05 04:26:33,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:26:33,697 INFO L482 AbstractCegarLoop]: Abstraction has 434 states and 1249 transitions. [2021-06-05 04:26:33,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:33,697 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 1249 transitions. [2021-06-05 04:26:33,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:26:33,697 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:26:33,698 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:26:33,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1295,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:26:33,899 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:26:33,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:26:33,899 INFO L82 PathProgramCache]: Analyzing trace with hash -231780956, now seen corresponding path program 158 times [2021-06-05 04:26:33,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:26:33,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307290027] [2021-06-05 04:26:33,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:26:33,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:26:34,084 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:34,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:26:34,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307290027] [2021-06-05 04:26:34,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307290027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:34,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600145095] [2021-06-05 04:26:34,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:26:34,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:26:34,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:26:34,127 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 04:26:34,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:26:34,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:34,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:34,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:34,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:34,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:34,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-06-05 04:26:34,737 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:34,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:34,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:34,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:34,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:34,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2021-06-05 04:26:34,744 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:34,756 INFO L628 ElimStorePlain]: treesize reduction 101, result has 9.8 percent of original size [2021-06-05 04:26:34,756 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:26:34,756 INFO L518 ElimStorePlain]: Eliminatee v_prenex_143 vanished before elimination [2021-06-05 04:26:34,756 INFO L518 ElimStorePlain]: Eliminatee v_prenex_144 vanished before elimination [2021-06-05 04:26:34,757 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:26:34,757 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:161, output treesize:11 [2021-06-05 04:26:34,779 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:34,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600145095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:34,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:26:34,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:26:34,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262291222] [2021-06-05 04:26:34,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:26:34,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:26:34,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:26:34,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:26:34,780 INFO L87 Difference]: Start difference. First operand 434 states and 1249 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:35,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:26:35,038 INFO L93 Difference]: Finished difference Result 554 states and 1503 transitions. [2021-06-05 04:26:35,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:26:35,039 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:26:35,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:26:35,039 INFO L225 Difference]: With dead ends: 554 [2021-06-05 04:26:35,039 INFO L226 Difference]: Without dead ends: 551 [2021-06-05 04:26:35,039 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 697.8ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:26:35,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-06-05 04:26:35,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 459. [2021-06-05 04:26:35,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 2.9017467248908297) internal successors, (1329), 458 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:35,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 1329 transitions. [2021-06-05 04:26:35,045 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 1329 transitions. Word has length 16 [2021-06-05 04:26:35,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:26:35,045 INFO L482 AbstractCegarLoop]: Abstraction has 459 states and 1329 transitions. [2021-06-05 04:26:35,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:35,045 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 1329 transitions. [2021-06-05 04:26:35,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:26:35,046 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:26:35,046 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:26:35,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1313 [2021-06-05 04:26:35,261 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:26:35,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:26:35,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1713455554, now seen corresponding path program 159 times [2021-06-05 04:26:35,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:26:35,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126978398] [2021-06-05 04:26:35,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:26:35,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:26:35,567 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:35,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:26:35,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126978398] [2021-06-05 04:26:35,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126978398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:35,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655129634] [2021-06-05 04:26:35,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:26:35,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:26:35,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:26:35,596 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 04:26:35,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:26:35,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:35,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:35,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:35,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:35,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:36,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:36,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 23 [2021-06-05 04:26:36,004 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:36,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:36,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:36,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:36,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:36,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:36,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:36,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-06-05 04:26:36,016 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:36,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:36,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:36,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:36,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:36,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:36,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:36,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 39 [2021-06-05 04:26:36,027 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:36,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:36,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:36,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:36,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:26:36,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:36,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-06-05 04:26:36,035 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:36,102 INFO L628 ElimStorePlain]: treesize reduction 105, result has 41.0 percent of original size [2021-06-05 04:26:36,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:36,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:26:36,106 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:26:36,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:26:36,133 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:26:36,133 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:285, output treesize:56 [2021-06-05 04:26:36,207 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:36,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655129634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:36,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:26:36,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:26:36,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253946190] [2021-06-05 04:26:36,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:26:36,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:26:36,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:26:36,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:26:36,209 INFO L87 Difference]: Start difference. First operand 459 states and 1329 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:36,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:26:36,827 INFO L93 Difference]: Finished difference Result 495 states and 1394 transitions. [2021-06-05 04:26:36,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:26:36,828 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:26:36,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:26:36,828 INFO L225 Difference]: With dead ends: 495 [2021-06-05 04:26:36,828 INFO L226 Difference]: Without dead ends: 487 [2021-06-05 04:26:36,829 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1039.5ms TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:26:36,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-06-05 04:26:36,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 464. [2021-06-05 04:26:36,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 2.900647948164147) internal successors, (1343), 463 states have internal predecessors, (1343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:36,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1343 transitions. [2021-06-05 04:26:36,833 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1343 transitions. Word has length 16 [2021-06-05 04:26:36,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:26:36,833 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 1343 transitions. [2021-06-05 04:26:36,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:36,833 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1343 transitions. [2021-06-05 04:26:36,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:26:36,834 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:26:36,834 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:26:37,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1329 [2021-06-05 04:26:37,034 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:26:37,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:26:37,035 INFO L82 PathProgramCache]: Analyzing trace with hash -640370174, now seen corresponding path program 160 times [2021-06-05 04:26:37,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:26:37,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289036031] [2021-06-05 04:26:37,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:26:37,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:26:37,185 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:37,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:26:37,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289036031] [2021-06-05 04:26:37,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289036031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:37,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763885743] [2021-06-05 04:26:37,185 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:26:37,213 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:26:37,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:26:37,213 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 04:26:37,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:26:37,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:37,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:37,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 29 [2021-06-05 04:26:37,553 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:37,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:37,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:37,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 29 [2021-06-05 04:26:37,559 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:37,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:37,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-06-05 04:26:37,563 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:37,576 INFO L628 ElimStorePlain]: treesize reduction 76, result has 12.6 percent of original size [2021-06-05 04:26:37,576 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:26:37,577 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:26:37,577 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:149, output treesize:11 [2021-06-05 04:26:37,586 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:37,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763885743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:37,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:26:37,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:26:37,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066092633] [2021-06-05 04:26:37,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:26:37,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:26:37,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:26:37,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:26:37,587 INFO L87 Difference]: Start difference. First operand 464 states and 1343 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:38,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:26:38,103 INFO L93 Difference]: Finished difference Result 571 states and 1546 transitions. [2021-06-05 04:26:38,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:26:38,104 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:26:38,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:26:38,104 INFO L225 Difference]: With dead ends: 571 [2021-06-05 04:26:38,105 INFO L226 Difference]: Without dead ends: 567 [2021-06-05 04:26:38,105 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 637.7ms TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:26:38,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-06-05 04:26:38,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 441. [2021-06-05 04:26:38,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 440 states have (on average 2.8863636363636362) internal successors, (1270), 440 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:38,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 1270 transitions. [2021-06-05 04:26:38,109 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 1270 transitions. Word has length 16 [2021-06-05 04:26:38,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:26:38,109 INFO L482 AbstractCegarLoop]: Abstraction has 441 states and 1270 transitions. [2021-06-05 04:26:38,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:38,110 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 1270 transitions. [2021-06-05 04:26:38,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:26:38,110 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:26:38,110 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:26:38,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1350,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:26:38,311 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:26:38,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:26:38,311 INFO L82 PathProgramCache]: Analyzing trace with hash 2002561658, now seen corresponding path program 161 times [2021-06-05 04:26:38,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:26:38,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162058042] [2021-06-05 04:26:38,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:26:38,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:26:38,392 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:38,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:26:38,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162058042] [2021-06-05 04:26:38,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162058042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:38,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067132384] [2021-06-05 04:26:38,393 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:26:38,420 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:26:38,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:26:38,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:26:38,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:26:38,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:26:38,550 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:38,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:38,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:26:38,553 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:38,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:26:38,556 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:38,558 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:26:38,559 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:38,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:38,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:26:38,562 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:38,563 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:26:38,564 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:38,584 INFO L628 ElimStorePlain]: treesize reduction 18, result has 52.6 percent of original size [2021-06-05 04:26:38,585 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:26:38,585 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:26:38,585 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:107, output treesize:20 [2021-06-05 04:26:38,612 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:38,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067132384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:38,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:26:38,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:26:38,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936240882] [2021-06-05 04:26:38,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:26:38,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:26:38,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:26:38,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:26:38,613 INFO L87 Difference]: Start difference. First operand 441 states and 1270 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:38,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:26:38,940 INFO L93 Difference]: Finished difference Result 605 states and 1704 transitions. [2021-06-05 04:26:38,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:26:38,940 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:26:38,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:26:38,941 INFO L225 Difference]: With dead ends: 605 [2021-06-05 04:26:38,941 INFO L226 Difference]: Without dead ends: 594 [2021-06-05 04:26:38,941 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 358.4ms TimeCoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:26:38,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-06-05 04:26:38,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 438. [2021-06-05 04:26:38,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 2.8924485125858124) internal successors, (1264), 437 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:38,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 1264 transitions. [2021-06-05 04:26:38,946 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 1264 transitions. Word has length 17 [2021-06-05 04:26:38,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:26:38,946 INFO L482 AbstractCegarLoop]: Abstraction has 438 states and 1264 transitions. [2021-06-05 04:26:38,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:38,947 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 1264 transitions. [2021-06-05 04:26:38,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:26:38,947 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:26:38,947 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:26:39,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1378,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:26:39,148 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:26:39,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:26:39,155 INFO L82 PathProgramCache]: Analyzing trace with hash 464142156, now seen corresponding path program 162 times [2021-06-05 04:26:39,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:26:39,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286467868] [2021-06-05 04:26:39,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:26:39,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:26:39,240 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:39,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:26:39,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286467868] [2021-06-05 04:26:39,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286467868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:39,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325662190] [2021-06-05 04:26:39,241 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:26:39,268 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:26:39,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:26:39,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:26:39,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:26:39,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:39,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:26:39,366 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:39,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:26:39,368 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:39,383 INFO L628 ElimStorePlain]: treesize reduction 27, result has 30.8 percent of original size [2021-06-05 04:26:39,383 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:26:39,384 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:26:39,384 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:12 [2021-06-05 04:26:39,405 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:39,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325662190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:39,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:26:39,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:26:39,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954261293] [2021-06-05 04:26:39,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:26:39,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:26:39,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:26:39,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:26:39,406 INFO L87 Difference]: Start difference. First operand 438 states and 1264 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:39,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:26:39,603 INFO L93 Difference]: Finished difference Result 606 states and 1712 transitions. [2021-06-05 04:26:39,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:26:39,603 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:26:39,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:26:39,604 INFO L225 Difference]: With dead ends: 606 [2021-06-05 04:26:39,604 INFO L226 Difference]: Without dead ends: 606 [2021-06-05 04:26:39,604 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 183.7ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:26:39,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2021-06-05 04:26:39,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 439. [2021-06-05 04:26:39,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 2.8926940639269407) internal successors, (1267), 438 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:39,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 1267 transitions. [2021-06-05 04:26:39,609 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 1267 transitions. Word has length 17 [2021-06-05 04:26:39,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:26:39,609 INFO L482 AbstractCegarLoop]: Abstraction has 439 states and 1267 transitions. [2021-06-05 04:26:39,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:39,609 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 1267 transitions. [2021-06-05 04:26:39,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:26:39,610 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:26:39,610 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:26:39,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1384,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:26:39,810 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:26:39,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:26:39,810 INFO L82 PathProgramCache]: Analyzing trace with hash 2101260346, now seen corresponding path program 163 times [2021-06-05 04:26:39,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:26:39,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945973133] [2021-06-05 04:26:39,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:26:39,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:26:39,910 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:39,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:26:39,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945973133] [2021-06-05 04:26:39,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945973133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:39,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634215427] [2021-06-05 04:26:39,910 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:26:39,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:26:39,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:26:39,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:26:40,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:40,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:40,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:26:40,048 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:40,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:40,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:40,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:26:40,051 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:40,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:40,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:40,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:26:40,055 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:40,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:40,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:26:40,058 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:40,091 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:26:40,091 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:26:40,092 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:26:40,092 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:26:40,147 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:40,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634215427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:40,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:26:40,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:26:40,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954982640] [2021-06-05 04:26:40,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:26:40,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:26:40,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:26:40,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:26:40,148 INFO L87 Difference]: Start difference. First operand 439 states and 1267 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:40,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:26:40,423 INFO L93 Difference]: Finished difference Result 671 states and 1821 transitions. [2021-06-05 04:26:40,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:26:40,424 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:26:40,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:26:40,424 INFO L225 Difference]: With dead ends: 671 [2021-06-05 04:26:40,424 INFO L226 Difference]: Without dead ends: 671 [2021-06-05 04:26:40,424 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 318.3ms TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:26:40,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2021-06-05 04:26:40,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 449. [2021-06-05 04:26:40,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 2.904017857142857) internal successors, (1301), 448 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:40,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 1301 transitions. [2021-06-05 04:26:40,430 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 1301 transitions. Word has length 17 [2021-06-05 04:26:40,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:26:40,430 INFO L482 AbstractCegarLoop]: Abstraction has 449 states and 1301 transitions. [2021-06-05 04:26:40,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:40,430 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 1301 transitions. [2021-06-05 04:26:40,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:26:40,430 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:26:40,431 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:26:40,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1386 [2021-06-05 04:26:40,631 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:26:40,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:26:40,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1392090722, now seen corresponding path program 164 times [2021-06-05 04:26:40,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:26:40,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975954959] [2021-06-05 04:26:40,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:26:40,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:26:40,728 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:40,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:26:40,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975954959] [2021-06-05 04:26:40,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975954959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:40,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811898679] [2021-06-05 04:26:40,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:26:40,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:26:40,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:26:40,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:26:40,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:26:40,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:40,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:40,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:26:40,866 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:40,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:40,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:40,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:26:40,869 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:40,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:40,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:40,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:26:40,873 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:40,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:40,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:26:40,876 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:40,910 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:26:40,910 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:26:40,910 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:26:40,910 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:26:40,981 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:40,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811898679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:40,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:26:40,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:26:40,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734100303] [2021-06-05 04:26:40,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:26:40,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:26:40,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:26:40,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:26:40,982 INFO L87 Difference]: Start difference. First operand 449 states and 1301 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:41,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:26:41,933 INFO L93 Difference]: Finished difference Result 687 states and 1849 transitions. [2021-06-05 04:26:41,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 04:26:41,933 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:26:41,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:26:41,934 INFO L225 Difference]: With dead ends: 687 [2021-06-05 04:26:41,934 INFO L226 Difference]: Without dead ends: 678 [2021-06-05 04:26:41,934 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 895.9ms TimeCoverageRelationStatistics Valid=194, Invalid=1288, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 04:26:41,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-06-05 04:26:41,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 454. [2021-06-05 04:26:41,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 2.905077262693157) internal successors, (1316), 453 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:41,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 1316 transitions. [2021-06-05 04:26:41,939 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 1316 transitions. Word has length 17 [2021-06-05 04:26:41,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:26:41,939 INFO L482 AbstractCegarLoop]: Abstraction has 454 states and 1316 transitions. [2021-06-05 04:26:41,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:41,939 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 1316 transitions. [2021-06-05 04:26:41,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:26:41,940 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:26:41,940 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:26:42,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1390 [2021-06-05 04:26:42,140 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:26:42,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:26:42,141 INFO L82 PathProgramCache]: Analyzing trace with hash 326252984, now seen corresponding path program 165 times [2021-06-05 04:26:42,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:26:42,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368118997] [2021-06-05 04:26:42,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:26:42,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:26:42,251 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:42,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:26:42,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368118997] [2021-06-05 04:26:42,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368118997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:42,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281568539] [2021-06-05 04:26:42,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:26:42,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:26:42,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:26:42,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:26:42,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:26:42,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:42,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:42,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:26:42,391 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:42,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:42,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:42,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:26:42,394 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:42,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:42,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:42,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:26:42,398 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:42,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:42,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:26:42,401 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:42,435 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:26:42,435 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:26:42,435 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:26:42,436 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:26:42,485 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:42,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281568539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:42,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:26:42,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:26:42,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536670196] [2021-06-05 04:26:42,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:26:42,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:26:42,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:26:42,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:26:42,486 INFO L87 Difference]: Start difference. First operand 454 states and 1316 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:43,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:26:43,081 INFO L93 Difference]: Finished difference Result 665 states and 1818 transitions. [2021-06-05 04:26:43,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:26:43,081 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:26:43,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:26:43,082 INFO L225 Difference]: With dead ends: 665 [2021-06-05 04:26:43,082 INFO L226 Difference]: Without dead ends: 665 [2021-06-05 04:26:43,082 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 541.3ms TimeCoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:26:43,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2021-06-05 04:26:43,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 450. [2021-06-05 04:26:43,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 2.893095768374165) internal successors, (1299), 449 states have internal predecessors, (1299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:43,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 1299 transitions. [2021-06-05 04:26:43,087 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 1299 transitions. Word has length 17 [2021-06-05 04:26:43,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:26:43,087 INFO L482 AbstractCegarLoop]: Abstraction has 450 states and 1299 transitions. [2021-06-05 04:26:43,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:43,088 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 1299 transitions. [2021-06-05 04:26:43,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:26:43,088 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:26:43,088 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:26:43,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1395,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:26:43,289 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:26:43,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:26:43,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1384360324, now seen corresponding path program 166 times [2021-06-05 04:26:43,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:26:43,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060052423] [2021-06-05 04:26:43,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:26:43,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:26:43,384 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:43,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:26:43,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060052423] [2021-06-05 04:26:43,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060052423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:43,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426763857] [2021-06-05 04:26:43,385 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:26:43,413 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:26:43,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:26:43,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:26:43,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:26:43,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:43,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:43,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:26:43,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:43,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:43,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:26:43,555 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:43,578 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:26:43,578 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:26:43,579 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:26:43,579 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:26:43,600 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:43,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426763857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:43,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:26:43,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:26:43,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457302924] [2021-06-05 04:26:43,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:26:43,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:26:43,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:26:43,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:26:43,601 INFO L87 Difference]: Start difference. First operand 450 states and 1299 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:44,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:26:44,134 INFO L93 Difference]: Finished difference Result 719 states and 1930 transitions. [2021-06-05 04:26:44,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 04:26:44,134 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:26:44,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:26:44,135 INFO L225 Difference]: With dead ends: 719 [2021-06-05 04:26:44,135 INFO L226 Difference]: Without dead ends: 719 [2021-06-05 04:26:44,135 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 511.9ms TimeCoverageRelationStatistics Valid=143, Invalid=913, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:26:44,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2021-06-05 04:26:44,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 459. [2021-06-05 04:26:44,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 2.906113537117904) internal successors, (1331), 458 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:44,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 1331 transitions. [2021-06-05 04:26:44,141 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 1331 transitions. Word has length 17 [2021-06-05 04:26:44,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:26:44,141 INFO L482 AbstractCegarLoop]: Abstraction has 459 states and 1331 transitions. [2021-06-05 04:26:44,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:44,141 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 1331 transitions. [2021-06-05 04:26:44,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:26:44,141 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:26:44,141 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:26:44,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1399 [2021-06-05 04:26:44,342 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:26:44,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:26:44,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1421201976, now seen corresponding path program 167 times [2021-06-05 04:26:44,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:26:44,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645070721] [2021-06-05 04:26:44,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:26:44,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:26:44,435 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:44,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:26:44,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645070721] [2021-06-05 04:26:44,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645070721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:44,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846385284] [2021-06-05 04:26:44,435 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:26:44,463 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:26:44,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:26:44,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:26:44,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:26:44,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:44,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:44,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:26:44,617 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:44,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:44,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:26:44,620 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:44,642 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:26:44,642 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:26:44,643 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:26:44,643 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:26:44,664 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:44,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846385284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:44,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:26:44,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:26:44,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629504009] [2021-06-05 04:26:44,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:26:44,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:26:44,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:26:44,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:26:44,665 INFO L87 Difference]: Start difference. First operand 459 states and 1331 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:45,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:26:45,168 INFO L93 Difference]: Finished difference Result 675 states and 1881 transitions. [2021-06-05 04:26:45,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:26:45,168 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:26:45,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:26:45,169 INFO L225 Difference]: With dead ends: 675 [2021-06-05 04:26:45,169 INFO L226 Difference]: Without dead ends: 675 [2021-06-05 04:26:45,169 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 476.1ms TimeCoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:26:45,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2021-06-05 04:26:45,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 461. [2021-06-05 04:26:45,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 2.9065217391304348) internal successors, (1337), 460 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:45,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 1337 transitions. [2021-06-05 04:26:45,174 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 1337 transitions. Word has length 17 [2021-06-05 04:26:45,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:26:45,174 INFO L482 AbstractCegarLoop]: Abstraction has 461 states and 1337 transitions. [2021-06-05 04:26:45,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:45,174 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 1337 transitions. [2021-06-05 04:26:45,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:26:45,175 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:26:45,175 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:26:45,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1402,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:26:45,375 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:26:45,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:26:45,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1800679940, now seen corresponding path program 168 times [2021-06-05 04:26:45,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:26:45,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783295913] [2021-06-05 04:26:45,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:26:45,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:26:45,484 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:45,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:26:45,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783295913] [2021-06-05 04:26:45,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783295913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:45,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812451847] [2021-06-05 04:26:45,485 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:26:45,512 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:26:45,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:26:45,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:26:45,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:26:45,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:45,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:45,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:26:45,645 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:45,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:45,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:26:45,648 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:45,670 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:26:45,670 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:26:45,671 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:26:45,671 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:26:45,692 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:45,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812451847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:45,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:26:45,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:26:45,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921977235] [2021-06-05 04:26:45,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:26:45,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:26:45,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:26:45,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:26:45,693 INFO L87 Difference]: Start difference. First operand 461 states and 1337 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:45,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:26:45,848 INFO L93 Difference]: Finished difference Result 629 states and 1785 transitions. [2021-06-05 04:26:45,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:26:45,848 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:26:45,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:26:45,849 INFO L225 Difference]: With dead ends: 629 [2021-06-05 04:26:45,849 INFO L226 Difference]: Without dead ends: 629 [2021-06-05 04:26:45,849 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 198.0ms TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:26:45,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-06-05 04:26:45,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 461. [2021-06-05 04:26:45,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 2.9065217391304348) internal successors, (1337), 460 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:45,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 1337 transitions. [2021-06-05 04:26:45,854 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 1337 transitions. Word has length 17 [2021-06-05 04:26:45,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:26:45,854 INFO L482 AbstractCegarLoop]: Abstraction has 461 states and 1337 transitions. [2021-06-05 04:26:45,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:45,854 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 1337 transitions. [2021-06-05 04:26:45,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:26:45,855 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:26:45,855 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:26:46,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1405,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:26:46,055 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:26:46,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:26:46,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1235007934, now seen corresponding path program 169 times [2021-06-05 04:26:46,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:26:46,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862006921] [2021-06-05 04:26:46,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:26:46,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:26:46,134 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:46,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:26:46,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862006921] [2021-06-05 04:26:46,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862006921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:46,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017104] [2021-06-05 04:26:46,135 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:26:46,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:26:46,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:26:46,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:26:46,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:46,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:46,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:26:46,260 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:46,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:46,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:26:46,263 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:46,287 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-06-05 04:26:46,287 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:26:46,288 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:26:46,288 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-06-05 04:26:46,310 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:46,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:46,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:26:46,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:26:46,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634666838] [2021-06-05 04:26:46,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:26:46,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:26:46,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:26:46,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:26:46,311 INFO L87 Difference]: Start difference. First operand 461 states and 1337 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:46,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:26:46,674 INFO L93 Difference]: Finished difference Result 680 states and 1840 transitions. [2021-06-05 04:26:46,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:26:46,674 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:26:46,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:26:46,675 INFO L225 Difference]: With dead ends: 680 [2021-06-05 04:26:46,675 INFO L226 Difference]: Without dead ends: 680 [2021-06-05 04:26:46,675 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 252.6ms TimeCoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:26:46,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-06-05 04:26:46,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 532. [2021-06-05 04:26:46,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 531 states have (on average 2.9661016949152543) internal successors, (1575), 531 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:46,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 1575 transitions. [2021-06-05 04:26:46,681 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 1575 transitions. Word has length 17 [2021-06-05 04:26:46,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:26:46,681 INFO L482 AbstractCegarLoop]: Abstraction has 532 states and 1575 transitions. [2021-06-05 04:26:46,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:46,681 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 1575 transitions. [2021-06-05 04:26:46,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:26:46,682 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:26:46,682 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:26:46,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1408,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:26:46,882 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:26:46,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:26:46,882 INFO L82 PathProgramCache]: Analyzing trace with hash 315307226, now seen corresponding path program 170 times [2021-06-05 04:26:46,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:26:46,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644462329] [2021-06-05 04:26:46,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:26:46,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:26:46,959 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:46,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:26:46,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644462329] [2021-06-05 04:26:46,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644462329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:46,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004074343] [2021-06-05 04:26:46,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:26:46,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:26:46,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:26:46,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:26:46,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:26:47,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:26:47,090 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:47,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:47,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:47,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:26:47,093 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:47,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:26:47,096 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:47,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:47,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:47,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:26:47,100 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:47,101 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:26:47,102 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:47,104 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:26:47,104 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:47,132 INFO L628 ElimStorePlain]: treesize reduction 21, result has 58.0 percent of original size [2021-06-05 04:26:47,133 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:26:47,133 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:26:47,133 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-06-05 04:26:47,167 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:47,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004074343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:47,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:26:47,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:26:47,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809967001] [2021-06-05 04:26:47,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:26:47,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:26:47,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:26:47,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:26:47,168 INFO L87 Difference]: Start difference. First operand 532 states and 1575 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:47,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:26:47,609 INFO L93 Difference]: Finished difference Result 637 states and 1759 transitions. [2021-06-05 04:26:47,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:26:47,610 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:26:47,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:26:47,610 INFO L225 Difference]: With dead ends: 637 [2021-06-05 04:26:47,611 INFO L226 Difference]: Without dead ends: 633 [2021-06-05 04:26:47,611 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 389.6ms TimeCoverageRelationStatistics Valid=113, Invalid=817, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:26:47,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-06-05 04:26:47,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 534. [2021-06-05 04:26:47,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 533 states have (on average 2.949343339587242) internal successors, (1572), 533 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:47,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 1572 transitions. [2021-06-05 04:26:47,616 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 1572 transitions. Word has length 17 [2021-06-05 04:26:47,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:26:47,616 INFO L482 AbstractCegarLoop]: Abstraction has 534 states and 1572 transitions. [2021-06-05 04:26:47,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:47,616 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 1572 transitions. [2021-06-05 04:26:47,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:26:47,617 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:26:47,617 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:26:47,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1410 [2021-06-05 04:26:47,817 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:26:47,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:26:47,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1242738332, now seen corresponding path program 171 times [2021-06-05 04:26:47,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:26:47,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072393811] [2021-06-05 04:26:47,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:26:47,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:26:47,904 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:47,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:26:47,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072393811] [2021-06-05 04:26:47,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072393811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:47,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319817470] [2021-06-05 04:26:47,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:26:47,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:26:47,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:26:47,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:26:47,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:26:48,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:48,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:48,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:26:48,015 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:48,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:48,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:48,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:26:48,018 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:48,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:48,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:48,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:26:48,022 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:48,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:48,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:26:48,025 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:48,058 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:26:48,059 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:26:48,059 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:26:48,059 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:26:48,111 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:48,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319817470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:48,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:26:48,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:26:48,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081718974] [2021-06-05 04:26:48,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:26:48,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:26:48,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:26:48,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:26:48,112 INFO L87 Difference]: Start difference. First operand 534 states and 1572 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:48,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:26:48,576 INFO L93 Difference]: Finished difference Result 702 states and 1885 transitions. [2021-06-05 04:26:48,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:26:48,576 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:26:48,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:26:48,577 INFO L225 Difference]: With dead ends: 702 [2021-06-05 04:26:48,577 INFO L226 Difference]: Without dead ends: 701 [2021-06-05 04:26:48,577 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 375.3ms TimeCoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:26:48,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2021-06-05 04:26:48,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 541. [2021-06-05 04:26:48,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 540 states have (on average 2.9611111111111112) internal successors, (1599), 540 states have internal predecessors, (1599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:48,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 1599 transitions. [2021-06-05 04:26:48,583 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 1599 transitions. Word has length 17 [2021-06-05 04:26:48,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:26:48,584 INFO L482 AbstractCegarLoop]: Abstraction has 541 states and 1599 transitions. [2021-06-05 04:26:48,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:48,584 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 1599 transitions. [2021-06-05 04:26:48,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:26:48,584 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:26:48,584 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:26:48,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1415 [2021-06-05 04:26:48,785 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:26:48,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:26:48,785 INFO L82 PathProgramCache]: Analyzing trace with hash 2044354560, now seen corresponding path program 172 times [2021-06-05 04:26:48,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:26:48,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50246363] [2021-06-05 04:26:48,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:26:48,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:26:48,873 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:48,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:26:48,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50246363] [2021-06-05 04:26:48,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50246363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:48,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116492436] [2021-06-05 04:26:48,873 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:26:48,901 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:26:48,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:26:48,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:26:48,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:26:48,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:48,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:48,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:26:48,983 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:48,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:48,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:48,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:26:48,986 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:48,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:48,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:48,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:26:48,990 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:48,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:48,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:26:48,993 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:49,026 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:26:49,026 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:26:49,027 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:26:49,027 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:26:49,097 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:49,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116492436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:49,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:26:49,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:26:49,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77539655] [2021-06-05 04:26:49,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:26:49,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:26:49,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:26:49,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:26:49,098 INFO L87 Difference]: Start difference. First operand 541 states and 1599 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:49,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:26:49,750 INFO L93 Difference]: Finished difference Result 712 states and 1917 transitions. [2021-06-05 04:26:49,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 04:26:49,750 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:26:49,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:26:49,751 INFO L225 Difference]: With dead ends: 712 [2021-06-05 04:26:49,751 INFO L226 Difference]: Without dead ends: 708 [2021-06-05 04:26:49,751 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 568.1ms TimeCoverageRelationStatistics Valid=175, Invalid=1231, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 04:26:49,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2021-06-05 04:26:49,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 552. [2021-06-05 04:26:49,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 551 states have (on average 2.9600725952813067) internal successors, (1631), 551 states have internal predecessors, (1631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:49,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 1631 transitions. [2021-06-05 04:26:49,758 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 1631 transitions. Word has length 17 [2021-06-05 04:26:49,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:26:49,758 INFO L482 AbstractCegarLoop]: Abstraction has 552 states and 1631 transitions. [2021-06-05 04:26:49,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:49,758 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 1631 transitions. [2021-06-05 04:26:49,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:26:49,758 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:26:49,758 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:26:49,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1419,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:26:49,959 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:26:49,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:26:49,959 INFO L82 PathProgramCache]: Analyzing trace with hash -532269030, now seen corresponding path program 173 times [2021-06-05 04:26:49,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:26:49,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163752674] [2021-06-05 04:26:49,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:26:49,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:26:50,048 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:50,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:26:50,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163752674] [2021-06-05 04:26:50,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163752674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:50,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975505735] [2021-06-05 04:26:50,048 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:26:50,088 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:26:50,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:26:50,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:26:50,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:26:50,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:50,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:50,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:26:50,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:50,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:50,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:50,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:26:50,175 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:50,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:50,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:50,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:26:50,179 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:50,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:50,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:26:50,182 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:50,216 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:26:50,216 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:26:50,216 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:26:50,217 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:26:50,266 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:50,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975505735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:50,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:26:50,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:26:50,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874011909] [2021-06-05 04:26:50,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:26:50,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:26:50,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:26:50,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:26:50,267 INFO L87 Difference]: Start difference. First operand 552 states and 1631 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:50,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:26:50,837 INFO L93 Difference]: Finished difference Result 698 states and 1886 transitions. [2021-06-05 04:26:50,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 04:26:50,837 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:26:50,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:26:50,838 INFO L225 Difference]: With dead ends: 698 [2021-06-05 04:26:50,838 INFO L226 Difference]: Without dead ends: 698 [2021-06-05 04:26:50,839 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 485.1ms TimeCoverageRelationStatistics Valid=146, Invalid=846, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:26:50,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2021-06-05 04:26:50,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 535. [2021-06-05 04:26:50,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 534 states have (on average 2.9344569288389515) internal successors, (1567), 534 states have internal predecessors, (1567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:50,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 1567 transitions. [2021-06-05 04:26:50,844 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 1567 transitions. Word has length 17 [2021-06-05 04:26:50,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:26:50,844 INFO L482 AbstractCegarLoop]: Abstraction has 535 states and 1567 transitions. [2021-06-05 04:26:50,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:50,844 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 1567 transitions. [2021-06-05 04:26:50,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:26:50,845 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:26:50,845 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:26:51,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1424 [2021-06-05 04:26:51,045 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:26:51,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:26:51,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1360854522, now seen corresponding path program 174 times [2021-06-05 04:26:51,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:26:51,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473630259] [2021-06-05 04:26:51,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:26:51,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:26:51,131 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:51,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:26:51,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473630259] [2021-06-05 04:26:51,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473630259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:51,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139810010] [2021-06-05 04:26:51,131 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:26:51,160 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:26:51,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:26:51,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:26:51,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:26:51,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:51,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:51,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:26:51,270 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:51,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:51,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:51,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:26:51,274 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:51,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:51,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:51,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:26:51,277 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:51,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:51,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:26:51,280 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:51,314 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:26:51,314 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:26:51,315 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:26:51,315 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:26:51,378 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:51,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139810010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:51,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:26:51,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:26:51,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692610362] [2021-06-05 04:26:51,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:26:51,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:26:51,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:26:51,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:26:51,379 INFO L87 Difference]: Start difference. First operand 535 states and 1567 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:52,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:26:52,019 INFO L93 Difference]: Finished difference Result 721 states and 1917 transitions. [2021-06-05 04:26:52,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 04:26:52,019 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:26:52,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:26:52,020 INFO L225 Difference]: With dead ends: 721 [2021-06-05 04:26:52,020 INFO L226 Difference]: Without dead ends: 716 [2021-06-05 04:26:52,020 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 556.6ms TimeCoverageRelationStatistics Valid=181, Invalid=1459, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 04:26:52,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2021-06-05 04:26:52,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 555. [2021-06-05 04:26:52,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 554 states have (on average 2.9422382671480145) internal successors, (1630), 554 states have internal predecessors, (1630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:52,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 1630 transitions. [2021-06-05 04:26:52,026 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 1630 transitions. Word has length 17 [2021-06-05 04:26:52,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:26:52,026 INFO L482 AbstractCegarLoop]: Abstraction has 555 states and 1630 transitions. [2021-06-05 04:26:52,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:52,026 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 1630 transitions. [2021-06-05 04:26:52,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:26:52,027 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:26:52,027 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:26:52,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1428,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:26:52,227 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:26:52,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:26:52,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1205065440, now seen corresponding path program 175 times [2021-06-05 04:26:52,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:26:52,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032295142] [2021-06-05 04:26:52,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:26:52,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:26:52,323 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:52,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:26:52,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032295142] [2021-06-05 04:26:52,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032295142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:52,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834517686] [2021-06-05 04:26:52,324 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:26:52,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:26:52,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:26:52,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:26:52,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:52,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:52,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:26:52,505 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:52,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:26:52,510 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:52,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:26:52,514 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:52,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:26:52,517 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:52,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:52,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:52,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:26:52,522 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:52,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:26:52,525 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:52,556 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-05 04:26:52,556 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:26:52,557 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:26:52,557 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-05 04:26:52,584 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:52,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834517686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:52,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:26:52,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:26:52,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872175148] [2021-06-05 04:26:52,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:26:52,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:26:52,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:26:52,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:26:52,585 INFO L87 Difference]: Start difference. First operand 555 states and 1630 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:53,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:26:53,122 INFO L93 Difference]: Finished difference Result 663 states and 1818 transitions. [2021-06-05 04:26:53,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 04:26:53,122 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:26:53,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:26:53,123 INFO L225 Difference]: With dead ends: 663 [2021-06-05 04:26:53,123 INFO L226 Difference]: Without dead ends: 655 [2021-06-05 04:26:53,123 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 421.4ms TimeCoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:26:53,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2021-06-05 04:26:53,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 559. [2021-06-05 04:26:53,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 558 states have (on average 2.921146953405018) internal successors, (1630), 558 states have internal predecessors, (1630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:53,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 1630 transitions. [2021-06-05 04:26:53,129 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 1630 transitions. Word has length 17 [2021-06-05 04:26:53,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:26:53,129 INFO L482 AbstractCegarLoop]: Abstraction has 559 states and 1630 transitions. [2021-06-05 04:26:53,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:53,129 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 1630 transitions. [2021-06-05 04:26:53,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:26:53,129 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:26:53,130 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:26:53,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1434,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:26:53,330 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:26:53,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:26:53,330 INFO L82 PathProgramCache]: Analyzing trace with hash 562679962, now seen corresponding path program 176 times [2021-06-05 04:26:53,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:26:53,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627850258] [2021-06-05 04:26:53,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:26:53,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:26:53,412 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:53,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:26:53,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627850258] [2021-06-05 04:26:53,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627850258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:53,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385039422] [2021-06-05 04:26:53,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:26:53,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:26:53,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:26:53,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:26:53,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:26:53,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:53,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:53,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:26:53,550 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:53,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:53,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:26:53,553 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:53,575 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:26:53,575 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:26:53,576 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:26:53,576 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:26:53,596 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:53,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385039422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:53,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:26:53,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:26:53,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032783461] [2021-06-05 04:26:53,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:26:53,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:26:53,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:26:53,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:26:53,597 INFO L87 Difference]: Start difference. First operand 559 states and 1630 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:54,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:26:54,011 INFO L93 Difference]: Finished difference Result 785 states and 2063 transitions. [2021-06-05 04:26:54,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 04:26:54,011 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:26:54,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:26:54,012 INFO L225 Difference]: With dead ends: 785 [2021-06-05 04:26:54,012 INFO L226 Difference]: Without dead ends: 785 [2021-06-05 04:26:54,013 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 301.5ms TimeCoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:26:54,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2021-06-05 04:26:54,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 562. [2021-06-05 04:26:54,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 561 states have (on average 2.9180035650623886) internal successors, (1637), 561 states have internal predecessors, (1637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:54,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 1637 transitions. [2021-06-05 04:26:54,018 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 1637 transitions. Word has length 17 [2021-06-05 04:26:54,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:26:54,019 INFO L482 AbstractCegarLoop]: Abstraction has 562 states and 1637 transitions. [2021-06-05 04:26:54,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:54,019 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 1637 transitions. [2021-06-05 04:26:54,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:26:54,019 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:26:54,019 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:26:54,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1441 [2021-06-05 04:26:54,220 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:26:54,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:26:54,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1861027394, now seen corresponding path program 177 times [2021-06-05 04:26:54,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:26:54,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229625935] [2021-06-05 04:26:54,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:26:54,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:26:54,308 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:54,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:26:54,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229625935] [2021-06-05 04:26:54,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229625935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:54,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504518028] [2021-06-05 04:26:54,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:26:54,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:26:54,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:26:54,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:26:54,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:26:54,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:54,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:54,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:26:54,425 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:54,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:54,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:54,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:26:54,429 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:54,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:54,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:54,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:26:54,432 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:54,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:54,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:26:54,435 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:54,469 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:26:54,469 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:26:54,469 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:26:54,469 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:26:54,532 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:54,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504518028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:54,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:26:54,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:26:54,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514928185] [2021-06-05 04:26:54,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:26:54,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:26:54,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:26:54,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:26:54,533 INFO L87 Difference]: Start difference. First operand 562 states and 1637 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:54,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:26:54,955 INFO L93 Difference]: Finished difference Result 689 states and 1887 transitions. [2021-06-05 04:26:54,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:26:54,955 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:26:54,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:26:54,956 INFO L225 Difference]: With dead ends: 689 [2021-06-05 04:26:54,956 INFO L226 Difference]: Without dead ends: 685 [2021-06-05 04:26:54,956 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 403.3ms TimeCoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:26:54,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2021-06-05 04:26:54,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 571. [2021-06-05 04:26:54,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 570 states have (on average 2.9192982456140353) internal successors, (1664), 570 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:54,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 1664 transitions. [2021-06-05 04:26:54,962 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 1664 transitions. Word has length 17 [2021-06-05 04:26:54,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:26:54,962 INFO L482 AbstractCegarLoop]: Abstraction has 571 states and 1664 transitions. [2021-06-05 04:26:54,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:54,962 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 1664 transitions. [2021-06-05 04:26:54,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:26:54,963 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:26:54,963 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:26:55,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1444,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:26:55,169 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:26:55,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:26:55,169 INFO L82 PathProgramCache]: Analyzing trace with hash -131980060, now seen corresponding path program 178 times [2021-06-05 04:26:55,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:26:55,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315297421] [2021-06-05 04:26:55,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:26:55,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:26:55,298 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:55,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:26:55,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315297421] [2021-06-05 04:26:55,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315297421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:55,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237789472] [2021-06-05 04:26:55,299 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:26:55,332 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:26:55,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:26:55,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:26:55,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:26:55,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:55,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:55,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:26:55,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:55,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:26:55,505 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:55,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:26:55,508 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:55,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:26:55,512 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:55,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:55,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:55,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:26:55,516 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:55,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:26:55,520 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:55,555 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-05 04:26:55,555 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:26:55,556 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:26:55,556 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-05 04:26:55,587 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:55,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237789472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:55,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:26:55,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:26:55,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36944275] [2021-06-05 04:26:55,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:26:55,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:26:55,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:26:55,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:26:55,589 INFO L87 Difference]: Start difference. First operand 571 states and 1664 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:55,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:26:55,930 INFO L93 Difference]: Finished difference Result 632 states and 1781 transitions. [2021-06-05 04:26:55,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:26:55,930 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:26:55,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:26:55,931 INFO L225 Difference]: With dead ends: 632 [2021-06-05 04:26:55,931 INFO L226 Difference]: Without dead ends: 624 [2021-06-05 04:26:55,931 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 415.9ms TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:26:55,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2021-06-05 04:26:55,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 571. [2021-06-05 04:26:55,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 570 states have (on average 2.912280701754386) internal successors, (1660), 570 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:55,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 1660 transitions. [2021-06-05 04:26:55,938 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 1660 transitions. Word has length 17 [2021-06-05 04:26:55,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:26:55,938 INFO L482 AbstractCegarLoop]: Abstraction has 571 states and 1660 transitions. [2021-06-05 04:26:55,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:55,938 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 1660 transitions. [2021-06-05 04:26:55,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:26:55,939 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:26:55,939 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:26:56,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1450,183 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:26:56,140 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:26:56,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:26:56,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1928879742, now seen corresponding path program 179 times [2021-06-05 04:26:56,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:26:56,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030950628] [2021-06-05 04:26:56,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:26:56,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:26:56,222 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:56,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:26:56,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030950628] [2021-06-05 04:26:56,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030950628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:56,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895552627] [2021-06-05 04:26:56,222 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:26:56,250 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:26:56,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:26:56,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:26:56,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:26:56,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:56,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:56,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:26:56,393 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:56,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:26:56,396 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:56,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:26:56,400 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:56,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:26:56,403 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:56,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:56,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:56,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:26:56,407 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:56,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:26:56,411 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:56,441 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-05 04:26:56,441 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:26:56,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:26:56,443 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-05 04:26:56,470 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:56,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895552627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:56,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:26:56,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:26:56,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242554962] [2021-06-05 04:26:56,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:26:56,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:26:56,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:26:56,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:26:56,471 INFO L87 Difference]: Start difference. First operand 571 states and 1660 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:56,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:26:56,775 INFO L93 Difference]: Finished difference Result 628 states and 1771 transitions. [2021-06-05 04:26:56,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:26:56,775 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:26:56,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:26:56,776 INFO L225 Difference]: With dead ends: 628 [2021-06-05 04:26:56,776 INFO L226 Difference]: Without dead ends: 616 [2021-06-05 04:26:56,776 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 343.9ms TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:26:56,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2021-06-05 04:26:56,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 573. [2021-06-05 04:26:56,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 2.9003496503496504) internal successors, (1659), 572 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:56,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1659 transitions. [2021-06-05 04:26:56,782 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1659 transitions. Word has length 17 [2021-06-05 04:26:56,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:26:56,782 INFO L482 AbstractCegarLoop]: Abstraction has 573 states and 1659 transitions. [2021-06-05 04:26:56,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:56,782 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1659 transitions. [2021-06-05 04:26:56,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:26:56,782 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:26:56,782 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:26:56,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1457 [2021-06-05 04:26:56,983 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:26:56,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:26:56,983 INFO L82 PathProgramCache]: Analyzing trace with hash 146360346, now seen corresponding path program 180 times [2021-06-05 04:26:56,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:26:56,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119464573] [2021-06-05 04:26:56,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:26:56,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:26:57,065 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:57,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:26:57,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119464573] [2021-06-05 04:26:57,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119464573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:57,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856916523] [2021-06-05 04:26:57,065 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:26:57,092 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:26:57,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:26:57,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:26:57,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:26:57,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:57,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:57,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:26:57,206 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:57,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:57,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:26:57,209 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:57,231 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:26:57,232 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:26:57,232 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:26:57,232 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:26:57,253 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:57,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856916523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:57,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:26:57,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:26:57,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537370052] [2021-06-05 04:26:57,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:26:57,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:26:57,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:26:57,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:26:57,254 INFO L87 Difference]: Start difference. First operand 573 states and 1659 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:57,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:26:57,469 INFO L93 Difference]: Finished difference Result 666 states and 1855 transitions. [2021-06-05 04:26:57,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:26:57,469 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:26:57,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:26:57,470 INFO L225 Difference]: With dead ends: 666 [2021-06-05 04:26:57,470 INFO L226 Difference]: Without dead ends: 666 [2021-06-05 04:26:57,470 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 188.6ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:26:57,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2021-06-05 04:26:57,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 573. [2021-06-05 04:26:57,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 2.9003496503496504) internal successors, (1659), 572 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:57,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1659 transitions. [2021-06-05 04:26:57,478 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1659 transitions. Word has length 17 [2021-06-05 04:26:57,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:26:57,478 INFO L482 AbstractCegarLoop]: Abstraction has 573 states and 1659 transitions. [2021-06-05 04:26:57,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:57,478 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1659 transitions. [2021-06-05 04:26:57,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:26:57,479 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:26:57,479 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:26:57,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1464 [2021-06-05 04:26:57,701 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:26:57,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:26:57,701 INFO L82 PathProgramCache]: Analyzing trace with hash -267672872, now seen corresponding path program 181 times [2021-06-05 04:26:57,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:26:57,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736986771] [2021-06-05 04:26:57,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:26:57,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:26:57,794 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:57,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:26:57,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736986771] [2021-06-05 04:26:57,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736986771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:57,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308207558] [2021-06-05 04:26:57,795 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:26:57,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:26:57,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:26:57,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:26:57,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:57,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:57,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:26:57,922 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:57,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:57,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:57,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:26:57,925 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:57,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:57,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:57,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:26:57,928 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:57,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:57,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:26:57,931 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:57,964 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:26:57,965 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:26:57,965 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:26:57,965 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:26:58,015 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:58,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308207558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:58,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:26:58,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:26:58,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079677679] [2021-06-05 04:26:58,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:26:58,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:26:58,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:26:58,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:26:58,016 INFO L87 Difference]: Start difference. First operand 573 states and 1659 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:58,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:26:58,235 INFO L93 Difference]: Finished difference Result 686 states and 1874 transitions. [2021-06-05 04:26:58,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:26:58,236 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:26:58,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:26:58,237 INFO L225 Difference]: With dead ends: 686 [2021-06-05 04:26:58,237 INFO L226 Difference]: Without dead ends: 686 [2021-06-05 04:26:58,237 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 241.1ms TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:26:58,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2021-06-05 04:26:58,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 583. [2021-06-05 04:26:58,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 582 states have (on average 2.90893470790378) internal successors, (1693), 582 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:58,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 1693 transitions. [2021-06-05 04:26:58,243 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 1693 transitions. Word has length 17 [2021-06-05 04:26:58,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:26:58,243 INFO L482 AbstractCegarLoop]: Abstraction has 583 states and 1693 transitions. [2021-06-05 04:26:58,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:58,243 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 1693 transitions. [2021-06-05 04:26:58,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:26:58,243 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:26:58,243 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:26:58,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1467,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:26:58,445 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:26:58,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:26:58,445 INFO L82 PathProgramCache]: Analyzing trace with hash 533943356, now seen corresponding path program 182 times [2021-06-05 04:26:58,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:26:58,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34953935] [2021-06-05 04:26:58,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:26:58,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:26:58,539 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:58,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:26:58,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34953935] [2021-06-05 04:26:58,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34953935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:58,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192265693] [2021-06-05 04:26:58,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:26:58,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:26:58,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:26:58,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:26:58,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:26:58,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:58,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:58,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:26:58,673 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:58,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:58,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:58,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:26:58,676 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:58,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:58,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:58,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:26:58,680 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:58,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:26:58,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:26:58,683 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:26:58,717 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:26:58,717 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:26:58,717 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:26:58,717 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:26:58,787 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:58,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192265693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:58,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:26:58,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:26:58,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777704820] [2021-06-05 04:26:58,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:26:58,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:26:58,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:26:58,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:26:58,788 INFO L87 Difference]: Start difference. First operand 583 states and 1693 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:59,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:26:59,590 INFO L93 Difference]: Finished difference Result 703 states and 1905 transitions. [2021-06-05 04:26:59,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 04:26:59,590 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:26:59,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:26:59,591 INFO L225 Difference]: With dead ends: 703 [2021-06-05 04:26:59,591 INFO L226 Difference]: Without dead ends: 694 [2021-06-05 04:26:59,591 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 717.8ms TimeCoverageRelationStatistics Valid=154, Invalid=1106, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 04:26:59,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2021-06-05 04:26:59,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 588. [2021-06-05 04:26:59,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 587 states have (on average 2.909710391822828) internal successors, (1708), 587 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:59,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 1708 transitions. [2021-06-05 04:26:59,597 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 1708 transitions. Word has length 17 [2021-06-05 04:26:59,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:26:59,597 INFO L482 AbstractCegarLoop]: Abstraction has 588 states and 1708 transitions. [2021-06-05 04:26:59,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:26:59,597 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 1708 transitions. [2021-06-05 04:26:59,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:26:59,598 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:26:59,598 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:26:59,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1471,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:26:59,798 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:26:59,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:26:59,799 INFO L82 PathProgramCache]: Analyzing trace with hash -2042680234, now seen corresponding path program 183 times [2021-06-05 04:26:59,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:26:59,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48499564] [2021-06-05 04:26:59,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:26:59,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:26:59,900 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:26:59,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:26:59,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48499564] [2021-06-05 04:26:59,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48499564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:26:59,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512215924] [2021-06-05 04:26:59,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:26:59,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:26:59,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:26:59,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:26:59,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:27:00,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:00,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:00,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:00,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:00,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:00,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:00,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:27:00,037 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:00,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:00,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:00,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:00,041 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:00,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:00,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:27:00,044 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:00,077 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:27:00,077 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:27:00,078 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:27:00,078 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:27:00,126 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:00,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512215924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:00,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:27:00,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:27:00,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613336194] [2021-06-05 04:27:00,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:27:00,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:27:00,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:27:00,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:27:00,127 INFO L87 Difference]: Start difference. First operand 588 states and 1708 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:00,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:27:00,636 INFO L93 Difference]: Finished difference Result 681 states and 1874 transitions. [2021-06-05 04:27:00,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:27:00,636 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:27:00,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:27:00,637 INFO L225 Difference]: With dead ends: 681 [2021-06-05 04:27:00,637 INFO L226 Difference]: Without dead ends: 681 [2021-06-05 04:27:00,637 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 448.7ms TimeCoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:27:00,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2021-06-05 04:27:00,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 577. [2021-06-05 04:27:00,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 576 states have (on average 2.8958333333333335) internal successors, (1668), 576 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:00,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 1668 transitions. [2021-06-05 04:27:00,643 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 1668 transitions. Word has length 17 [2021-06-05 04:27:00,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:27:00,643 INFO L482 AbstractCegarLoop]: Abstraction has 577 states and 1668 transitions. [2021-06-05 04:27:00,643 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:00,643 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 1668 transitions. [2021-06-05 04:27:00,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:27:00,644 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:27:00,644 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:27:00,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1476 [2021-06-05 04:27:00,844 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:27:00,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:27:00,844 INFO L82 PathProgramCache]: Analyzing trace with hash 541673754, now seen corresponding path program 184 times [2021-06-05 04:27:00,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:27:00,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069122501] [2021-06-05 04:27:00,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:27:00,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:27:00,932 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:00,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:27:00,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069122501] [2021-06-05 04:27:00,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069122501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:00,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507231626] [2021-06-05 04:27:00,933 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:01,052 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:27:01,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:27:01,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:27:01,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:27:01,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:01,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:01,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:01,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:01,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:01,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:27:01,197 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:01,228 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:27:01,229 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:27:01,229 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:27:01,229 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:27:01,250 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:01,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507231626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:01,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:27:01,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:27:01,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920626632] [2021-06-05 04:27:01,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:27:01,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:27:01,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:27:01,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:27:01,251 INFO L87 Difference]: Start difference. First operand 577 states and 1668 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:01,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:27:01,795 INFO L93 Difference]: Finished difference Result 727 states and 1960 transitions. [2021-06-05 04:27:01,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 04:27:01,796 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:27:01,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:27:01,797 INFO L225 Difference]: With dead ends: 727 [2021-06-05 04:27:01,797 INFO L226 Difference]: Without dead ends: 727 [2021-06-05 04:27:01,797 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 498.6ms TimeCoverageRelationStatistics Valid=146, Invalid=910, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:27:01,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2021-06-05 04:27:01,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 575. [2021-06-05 04:27:01,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 2.897212543554007) internal successors, (1663), 574 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:01,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1663 transitions. [2021-06-05 04:27:01,802 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1663 transitions. Word has length 17 [2021-06-05 04:27:01,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:27:01,803 INFO L482 AbstractCegarLoop]: Abstraction has 575 states and 1663 transitions. [2021-06-05 04:27:01,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:01,803 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1663 transitions. [2021-06-05 04:27:01,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:27:01,803 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:27:01,803 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:27:02,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1480,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:02,004 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:27:02,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:27:02,004 INFO L82 PathProgramCache]: Analyzing trace with hash -947731242, now seen corresponding path program 185 times [2021-06-05 04:27:02,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:27:02,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94981988] [2021-06-05 04:27:02,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:27:02,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:27:02,083 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:02,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:27:02,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94981988] [2021-06-05 04:27:02,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94981988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:02,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785196081] [2021-06-05 04:27:02,084 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:02,112 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:27:02,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:27:02,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:27:02,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:27:02,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:02,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:02,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:02,241 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:02,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:02,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:27:02,244 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:02,267 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:27:02,267 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:27:02,268 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:27:02,268 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:27:02,288 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:02,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785196081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:02,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:27:02,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:27:02,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991091614] [2021-06-05 04:27:02,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:27:02,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:27:02,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:27:02,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:27:02,289 INFO L87 Difference]: Start difference. First operand 575 states and 1663 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:02,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:27:02,769 INFO L93 Difference]: Finished difference Result 672 states and 1874 transitions. [2021-06-05 04:27:02,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:27:02,769 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:27:02,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:27:02,770 INFO L225 Difference]: With dead ends: 672 [2021-06-05 04:27:02,770 INFO L226 Difference]: Without dead ends: 672 [2021-06-05 04:27:02,770 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 450.7ms TimeCoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:27:02,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-06-05 04:27:02,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 574. [2021-06-05 04:27:02,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 573 states have (on average 2.898778359511344) internal successors, (1661), 573 states have internal predecessors, (1661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:02,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 1661 transitions. [2021-06-05 04:27:02,776 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 1661 transitions. Word has length 17 [2021-06-05 04:27:02,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:27:02,776 INFO L482 AbstractCegarLoop]: Abstraction has 574 states and 1661 transitions. [2021-06-05 04:27:02,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:02,776 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 1661 transitions. [2021-06-05 04:27:02,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:27:02,777 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:27:02,777 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:27:02,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1483,190 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:02,978 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:27:02,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:27:02,978 INFO L82 PathProgramCache]: Analyzing trace with hash 125354138, now seen corresponding path program 186 times [2021-06-05 04:27:02,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:27:02,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838603847] [2021-06-05 04:27:02,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:27:02,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:27:03,058 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:03,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:27:03,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838603847] [2021-06-05 04:27:03,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838603847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:03,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170234516] [2021-06-05 04:27:03,058 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:03,085 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:27:03,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:27:03,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:27:03,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:27:03,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:03,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:03,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:03,207 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:03,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:03,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:27:03,210 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:03,233 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:27:03,233 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:27:03,234 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:27:03,234 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:27:03,255 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:03,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170234516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:03,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:27:03,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:27:03,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963963903] [2021-06-05 04:27:03,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:27:03,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:27:03,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:27:03,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:27:03,256 INFO L87 Difference]: Start difference. First operand 574 states and 1661 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:03,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:27:03,433 INFO L93 Difference]: Finished difference Result 642 states and 1808 transitions. [2021-06-05 04:27:03,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:27:03,434 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:27:03,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:27:03,434 INFO L225 Difference]: With dead ends: 642 [2021-06-05 04:27:03,434 INFO L226 Difference]: Without dead ends: 642 [2021-06-05 04:27:03,434 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 167.7ms TimeCoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:27:03,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2021-06-05 04:27:03,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 577. [2021-06-05 04:27:03,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 576 states have (on average 2.8975694444444446) internal successors, (1669), 576 states have internal predecessors, (1669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:03,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 1669 transitions. [2021-06-05 04:27:03,440 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 1669 transitions. Word has length 17 [2021-06-05 04:27:03,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:27:03,440 INFO L482 AbstractCegarLoop]: Abstraction has 577 states and 1669 transitions. [2021-06-05 04:27:03,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:03,440 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 1669 transitions. [2021-06-05 04:27:03,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:27:03,441 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:27:03,441 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:27:03,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1486 [2021-06-05 04:27:03,641 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:27:03,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:27:03,641 INFO L82 PathProgramCache]: Analyzing trace with hash 150986938, now seen corresponding path program 187 times [2021-06-05 04:27:03,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:27:03,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438067794] [2021-06-05 04:27:03,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:27:03,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:27:03,720 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:03,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:27:03,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438067794] [2021-06-05 04:27:03,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438067794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:03,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958174171] [2021-06-05 04:27:03,721 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:03,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:27:03,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:27:03,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:27:03,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:03,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:03,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:27:03,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:03,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:03,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:03,867 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:03,885 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-06-05 04:27:03,885 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:27:03,885 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:27:03,885 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-06-05 04:27:03,908 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:03,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958174171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:03,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:27:03,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:27:03,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445515323] [2021-06-05 04:27:03,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:27:03,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:27:03,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:27:03,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:27:03,909 INFO L87 Difference]: Start difference. First operand 577 states and 1669 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:04,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:27:04,217 INFO L93 Difference]: Finished difference Result 720 states and 1941 transitions. [2021-06-05 04:27:04,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:27:04,217 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:27:04,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:27:04,218 INFO L225 Difference]: With dead ends: 720 [2021-06-05 04:27:04,218 INFO L226 Difference]: Without dead ends: 720 [2021-06-05 04:27:04,218 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 230.3ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:27:04,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2021-06-05 04:27:04,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 599. [2021-06-05 04:27:04,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 2.9180602006688963) internal successors, (1745), 598 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:04,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 1745 transitions. [2021-06-05 04:27:04,224 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 1745 transitions. Word has length 17 [2021-06-05 04:27:04,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:27:04,225 INFO L482 AbstractCegarLoop]: Abstraction has 599 states and 1745 transitions. [2021-06-05 04:27:04,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:04,225 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 1745 transitions. [2021-06-05 04:27:04,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:27:04,225 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:27:04,225 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:27:04,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1489,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:04,426 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:27:04,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:27:04,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1705036062, now seen corresponding path program 188 times [2021-06-05 04:27:04,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:27:04,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082075861] [2021-06-05 04:27:04,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:27:04,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:27:04,509 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:04,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:27:04,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082075861] [2021-06-05 04:27:04,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082075861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:04,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264386162] [2021-06-05 04:27:04,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:04,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:27:04,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:27:04,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:27:04,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:27:04,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:27:04,669 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:04,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:04,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:04,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:04,673 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:04,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:27:04,676 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:04,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:04,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:04,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:27:04,679 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:04,681 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:27:04,682 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:04,683 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:27:04,684 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:04,718 INFO L628 ElimStorePlain]: treesize reduction 21, result has 58.0 percent of original size [2021-06-05 04:27:04,719 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:27:04,719 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:27:04,719 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-06-05 04:27:04,752 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:04,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264386162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:04,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:27:04,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:27:04,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195246314] [2021-06-05 04:27:04,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:27:04,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:27:04,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:27:04,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:27:04,753 INFO L87 Difference]: Start difference. First operand 599 states and 1745 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:05,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:27:05,244 INFO L93 Difference]: Finished difference Result 680 states and 1861 transitions. [2021-06-05 04:27:05,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:27:05,245 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:27:05,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:27:05,246 INFO L225 Difference]: With dead ends: 680 [2021-06-05 04:27:05,246 INFO L226 Difference]: Without dead ends: 674 [2021-06-05 04:27:05,246 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 403.1ms TimeCoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:27:05,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2021-06-05 04:27:05,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 603. [2021-06-05 04:27:05,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 602 states have (on average 2.903654485049834) internal successors, (1748), 602 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:05,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 1748 transitions. [2021-06-05 04:27:05,252 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 1748 transitions. Word has length 17 [2021-06-05 04:27:05,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:27:05,252 INFO L482 AbstractCegarLoop]: Abstraction has 603 states and 1748 transitions. [2021-06-05 04:27:05,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:05,252 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 1748 transitions. [2021-06-05 04:27:05,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:27:05,253 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:27:05,253 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:27:05,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1491,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:05,453 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:27:05,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:27:05,453 INFO L82 PathProgramCache]: Analyzing trace with hash 390629276, now seen corresponding path program 189 times [2021-06-05 04:27:05,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:27:05,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828098985] [2021-06-05 04:27:05,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:27:05,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:27:05,537 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:05,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:27:05,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828098985] [2021-06-05 04:27:05,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828098985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:05,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603437581] [2021-06-05 04:27:05,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:05,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:27:05,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:27:05,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:27:05,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:27:05,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:05,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:05,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:27:05,691 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:05,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:05,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:05,694 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:05,712 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-06-05 04:27:05,712 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:27:05,713 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:27:05,713 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-06-05 04:27:05,736 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:05,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603437581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:05,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:27:05,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:27:05,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297432607] [2021-06-05 04:27:05,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:27:05,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:27:05,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:27:05,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:27:05,737 INFO L87 Difference]: Start difference. First operand 603 states and 1748 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:06,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:27:06,505 INFO L93 Difference]: Finished difference Result 783 states and 2089 transitions. [2021-06-05 04:27:06,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 04:27:06,506 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:27:06,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:27:06,506 INFO L225 Difference]: With dead ends: 783 [2021-06-05 04:27:06,507 INFO L226 Difference]: Without dead ends: 779 [2021-06-05 04:27:06,507 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 643.9ms TimeCoverageRelationStatistics Valid=188, Invalid=1372, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 04:27:06,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2021-06-05 04:27:06,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 614. [2021-06-05 04:27:06,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 613 states have (on average 2.9200652528548123) internal successors, (1790), 613 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:06,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 1790 transitions. [2021-06-05 04:27:06,513 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 1790 transitions. Word has length 17 [2021-06-05 04:27:06,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:27:06,514 INFO L482 AbstractCegarLoop]: Abstraction has 614 states and 1790 transitions. [2021-06-05 04:27:06,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:06,514 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 1790 transitions. [2021-06-05 04:27:06,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:27:06,514 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:27:06,514 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:27:06,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1496 [2021-06-05 04:27:06,715 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:27:06,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:27:06,715 INFO L82 PathProgramCache]: Analyzing trace with hash -529071432, now seen corresponding path program 190 times [2021-06-05 04:27:06,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:27:06,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299269729] [2021-06-05 04:27:06,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:27:06,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:27:06,796 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:06,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:27:06,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299269729] [2021-06-05 04:27:06,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299269729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:06,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661748339] [2021-06-05 04:27:06,796 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:06,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:27:06,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:27:06,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:27:06,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:27:06,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:27:06,951 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:06,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:06,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:06,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:06,954 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:06,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:27:06,957 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:06,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:06,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:06,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:27:06,961 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:06,963 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:27:06,963 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:06,965 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:27:06,966 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:06,994 INFO L628 ElimStorePlain]: treesize reduction 21, result has 58.0 percent of original size [2021-06-05 04:27:06,994 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:27:06,995 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:27:06,995 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-06-05 04:27:07,027 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:07,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661748339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:07,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:27:07,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:27:07,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516137265] [2021-06-05 04:27:07,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:27:07,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:27:07,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:27:07,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:27:07,028 INFO L87 Difference]: Start difference. First operand 614 states and 1790 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:07,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:27:07,704 INFO L93 Difference]: Finished difference Result 695 states and 1916 transitions. [2021-06-05 04:27:07,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 04:27:07,705 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:27:07,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:27:07,705 INFO L225 Difference]: With dead ends: 695 [2021-06-05 04:27:07,705 INFO L226 Difference]: Without dead ends: 689 [2021-06-05 04:27:07,706 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 581.5ms TimeCoverageRelationStatistics Valid=155, Invalid=1105, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 04:27:07,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2021-06-05 04:27:07,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 617. [2021-06-05 04:27:07,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 616 states have (on average 2.905844155844156) internal successors, (1790), 616 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:07,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 1790 transitions. [2021-06-05 04:27:07,712 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 1790 transitions. Word has length 17 [2021-06-05 04:27:07,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:27:07,712 INFO L482 AbstractCegarLoop]: Abstraction has 617 states and 1790 transitions. [2021-06-05 04:27:07,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:07,712 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 1790 transitions. [2021-06-05 04:27:07,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:27:07,713 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:27:07,713 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:27:07,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1498 [2021-06-05 04:27:07,913 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:27:07,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:27:07,913 INFO L82 PathProgramCache]: Analyzing trace with hash 398359674, now seen corresponding path program 191 times [2021-06-05 04:27:07,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:27:07,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027083801] [2021-06-05 04:27:07,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:27:07,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:27:07,998 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:07,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:27:07,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027083801] [2021-06-05 04:27:07,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027083801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:07,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310515255] [2021-06-05 04:27:07,998 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:08,027 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:27:08,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:27:08,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:27:08,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:27:08,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:08,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:08,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:08,132 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:08,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:08,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:08,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:27:08,135 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:08,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:08,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:08,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:08,139 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:08,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:08,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:27:08,142 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:08,176 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:27:08,176 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:27:08,176 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:27:08,176 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:27:08,234 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:08,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310515255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:08,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:27:08,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:27:08,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386499642] [2021-06-05 04:27:08,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:27:08,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:27:08,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:27:08,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:27:08,235 INFO L87 Difference]: Start difference. First operand 617 states and 1790 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:08,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:27:08,875 INFO L93 Difference]: Finished difference Result 816 states and 2117 transitions. [2021-06-05 04:27:08,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 04:27:08,875 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:27:08,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:27:08,876 INFO L225 Difference]: With dead ends: 816 [2021-06-05 04:27:08,876 INFO L226 Difference]: Without dead ends: 813 [2021-06-05 04:27:08,876 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 563.8ms TimeCoverageRelationStatistics Valid=163, Invalid=1027, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:27:08,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 813 states. [2021-06-05 04:27:08,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 813 to 607. [2021-06-05 04:27:08,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 606 states have (on average 2.892739273927393) internal successors, (1753), 606 states have internal predecessors, (1753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:08,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 1753 transitions. [2021-06-05 04:27:08,886 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 1753 transitions. Word has length 17 [2021-06-05 04:27:08,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:27:08,886 INFO L482 AbstractCegarLoop]: Abstraction has 607 states and 1753 transitions. [2021-06-05 04:27:08,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:08,886 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 1753 transitions. [2021-06-05 04:27:08,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:27:08,887 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:27:08,887 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:27:09,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1503,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:09,109 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:27:09,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:27:09,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1199975902, now seen corresponding path program 192 times [2021-06-05 04:27:09,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:27:09,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008917734] [2021-06-05 04:27:09,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:27:09,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:27:09,196 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:09,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:27:09,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008917734] [2021-06-05 04:27:09,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008917734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:09,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008823419] [2021-06-05 04:27:09,196 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:09,223 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:27:09,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:27:09,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:27:09,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:27:09,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:09,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:09,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:09,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:09,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:09,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:09,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:27:09,333 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:09,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:09,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:09,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:09,336 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:09,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:09,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:27:09,339 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:09,373 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:27:09,373 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:27:09,373 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:27:09,374 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:27:09,453 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:09,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008823419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:09,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:27:09,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:27:09,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741206369] [2021-06-05 04:27:09,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:27:09,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:27:09,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:27:09,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:27:09,454 INFO L87 Difference]: Start difference. First operand 607 states and 1753 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:10,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:27:10,241 INFO L93 Difference]: Finished difference Result 758 states and 2004 transitions. [2021-06-05 04:27:10,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 04:27:10,241 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:27:10,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:27:10,242 INFO L225 Difference]: With dead ends: 758 [2021-06-05 04:27:10,242 INFO L226 Difference]: Without dead ends: 753 [2021-06-05 04:27:10,242 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 725.7ms TimeCoverageRelationStatistics Valid=199, Invalid=1361, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 04:27:10,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2021-06-05 04:27:10,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 615. [2021-06-05 04:27:10,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 614 states have (on average 2.8892508143322475) internal successors, (1774), 614 states have internal predecessors, (1774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:10,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 1774 transitions. [2021-06-05 04:27:10,249 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 1774 transitions. Word has length 17 [2021-06-05 04:27:10,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:27:10,249 INFO L482 AbstractCegarLoop]: Abstraction has 615 states and 1774 transitions. [2021-06-05 04:27:10,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:10,249 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 1774 transitions. [2021-06-05 04:27:10,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:27:10,249 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:27:10,249 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:27:10,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1507 [2021-06-05 04:27:10,450 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:27:10,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:27:10,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1376647688, now seen corresponding path program 193 times [2021-06-05 04:27:10,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:27:10,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957467044] [2021-06-05 04:27:10,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:27:10,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:27:10,537 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:10,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:27:10,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957467044] [2021-06-05 04:27:10,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957467044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:10,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749109325] [2021-06-05 04:27:10,537 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:10,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:27:10,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:27:10,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:27:10,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:10,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:10,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:10,675 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:10,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:10,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:10,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:27:10,679 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:10,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:10,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:10,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:10,682 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:10,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:10,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:27:10,685 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:10,718 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:27:10,718 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:27:10,719 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:27:10,719 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:27:10,768 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:10,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749109325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:10,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:27:10,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:27:10,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53684124] [2021-06-05 04:27:10,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:27:10,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:27:10,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:27:10,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:27:10,769 INFO L87 Difference]: Start difference. First operand 615 states and 1774 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:11,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:27:11,304 INFO L93 Difference]: Finished difference Result 734 states and 1964 transitions. [2021-06-05 04:27:11,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:27:11,304 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:27:11,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:27:11,305 INFO L225 Difference]: With dead ends: 734 [2021-06-05 04:27:11,305 INFO L226 Difference]: Without dead ends: 734 [2021-06-05 04:27:11,305 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 480.0ms TimeCoverageRelationStatistics Valid=149, Invalid=843, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:27:11,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2021-06-05 04:27:11,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 588. [2021-06-05 04:27:11,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 587 states have (on average 2.8705281090289607) internal successors, (1685), 587 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:11,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 1685 transitions. [2021-06-05 04:27:11,311 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 1685 transitions. Word has length 17 [2021-06-05 04:27:11,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:27:11,311 INFO L482 AbstractCegarLoop]: Abstraction has 588 states and 1685 transitions. [2021-06-05 04:27:11,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:11,311 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 1685 transitions. [2021-06-05 04:27:11,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:27:11,312 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:27:11,312 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:27:11,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1512 [2021-06-05 04:27:11,513 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:27:11,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:27:11,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1216001056, now seen corresponding path program 194 times [2021-06-05 04:27:11,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:27:11,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590308473] [2021-06-05 04:27:11,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:27:11,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:27:11,583 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:27:11,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:27:11,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590308473] [2021-06-05 04:27:11,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590308473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:11,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343551102] [2021-06-05 04:27:11,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:11,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:27:11,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:27:11,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:27:11,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:27:11,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:11,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:11,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:11,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:11,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:11,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:11,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:27:11,706 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:11,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:11,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:11,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:11,710 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:11,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:11,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:27:11,713 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:11,752 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:27:11,752 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:27:11,752 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:27:11,752 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:27:11,816 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:11,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343551102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:11,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:27:11,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 04:27:11,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842432773] [2021-06-05 04:27:11,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:27:11,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:27:11,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:27:11,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:27:11,817 INFO L87 Difference]: Start difference. First operand 588 states and 1685 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:12,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:27:12,413 INFO L93 Difference]: Finished difference Result 661 states and 1794 transitions. [2021-06-05 04:27:12,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 04:27:12,413 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:27:12,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:27:12,414 INFO L225 Difference]: With dead ends: 661 [2021-06-05 04:27:12,414 INFO L226 Difference]: Without dead ends: 657 [2021-06-05 04:27:12,415 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 602.2ms TimeCoverageRelationStatistics Valid=181, Invalid=1301, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 04:27:12,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2021-06-05 04:27:12,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 586. [2021-06-05 04:27:12,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 2.864957264957265) internal successors, (1676), 585 states have internal predecessors, (1676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:12,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1676 transitions. [2021-06-05 04:27:12,421 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1676 transitions. Word has length 17 [2021-06-05 04:27:12,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:27:12,421 INFO L482 AbstractCegarLoop]: Abstraction has 586 states and 1676 transitions. [2021-06-05 04:27:12,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:12,421 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1676 transitions. [2021-06-05 04:27:12,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:27:12,421 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:27:12,421 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:27:12,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1516,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:12,622 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:27:12,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:27:12,622 INFO L82 PathProgramCache]: Analyzing trace with hash -17959942, now seen corresponding path program 195 times [2021-06-05 04:27:12,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:27:12,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900225221] [2021-06-05 04:27:12,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:27:12,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:27:12,699 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:12,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:27:12,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900225221] [2021-06-05 04:27:12,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900225221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:12,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064893206] [2021-06-05 04:27:12,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:12,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:27:12,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:27:12,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 04:27:12,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:27:12,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:12,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:12,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:12,819 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:12,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:12,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:12,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:27:12,823 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:12,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:12,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:12,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:12,827 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:12,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:12,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:27:12,831 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:12,864 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:27:12,865 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:27:12,865 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:27:12,865 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:27:12,922 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:12,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064893206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:12,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:27:12,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 04:27:12,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952017273] [2021-06-05 04:27:12,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:27:12,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:27:12,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:27:12,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:27:12,923 INFO L87 Difference]: Start difference. First operand 586 states and 1676 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:13,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:27:13,323 INFO L93 Difference]: Finished difference Result 678 states and 1828 transitions. [2021-06-05 04:27:13,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:27:13,324 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:27:13,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:27:13,325 INFO L225 Difference]: With dead ends: 678 [2021-06-05 04:27:13,325 INFO L226 Difference]: Without dead ends: 676 [2021-06-05 04:27:13,325 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 367.9ms TimeCoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:27:13,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-06-05 04:27:13,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 575. [2021-06-05 04:27:13,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 2.857142857142857) internal successors, (1640), 574 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:13,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1640 transitions. [2021-06-05 04:27:13,333 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1640 transitions. Word has length 17 [2021-06-05 04:27:13,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:27:13,333 INFO L482 AbstractCegarLoop]: Abstraction has 575 states and 1640 transitions. [2021-06-05 04:27:13,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:13,333 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1640 transitions. [2021-06-05 04:27:13,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:27:13,334 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:27:13,334 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:27:13,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1522 [2021-06-05 04:27:13,556 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:27:13,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:27:13,557 INFO L82 PathProgramCache]: Analyzing trace with hash 783656286, now seen corresponding path program 196 times [2021-06-05 04:27:13,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:27:13,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167814415] [2021-06-05 04:27:13,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:27:13,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:27:13,635 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:13,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:27:13,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167814415] [2021-06-05 04:27:13,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167814415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:13,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383092814] [2021-06-05 04:27:13,635 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:13,662 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:27:13,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:27:13,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:27:13,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:27:13,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:13,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:13,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:13,754 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:13,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:13,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:13,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:27:13,758 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:13,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:13,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:13,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:13,761 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:13,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:13,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:27:13,765 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:13,798 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:27:13,799 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:27:13,799 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:27:13,799 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:27:13,868 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:13,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383092814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:13,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:27:13,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 04:27:13,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639679735] [2021-06-05 04:27:13,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:27:13,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:27:13,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:27:13,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:27:13,869 INFO L87 Difference]: Start difference. First operand 575 states and 1640 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:14,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:27:14,393 INFO L93 Difference]: Finished difference Result 648 states and 1777 transitions. [2021-06-05 04:27:14,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:27:14,393 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:27:14,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:27:14,394 INFO L225 Difference]: With dead ends: 648 [2021-06-05 04:27:14,394 INFO L226 Difference]: Without dead ends: 642 [2021-06-05 04:27:14,394 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 504.1ms TimeCoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:27:14,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2021-06-05 04:27:14,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 583. [2021-06-05 04:27:14,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 582 states have (on average 2.852233676975945) internal successors, (1660), 582 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:14,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 1660 transitions. [2021-06-05 04:27:14,401 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 1660 transitions. Word has length 17 [2021-06-05 04:27:14,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:27:14,401 INFO L482 AbstractCegarLoop]: Abstraction has 583 states and 1660 transitions. [2021-06-05 04:27:14,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:14,402 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 1660 transitions. [2021-06-05 04:27:14,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:27:14,402 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:27:14,402 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:27:14,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1526,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:14,625 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:27:14,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:27:14,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1792967304, now seen corresponding path program 197 times [2021-06-05 04:27:14,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:27:14,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623539546] [2021-06-05 04:27:14,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:27:14,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:27:14,704 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:14,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:27:14,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623539546] [2021-06-05 04:27:14,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623539546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:14,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167931864] [2021-06-05 04:27:14,705 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:14,734 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:27:14,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:27:14,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:27:14,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:27:14,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:14,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:14,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:14,826 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:14,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:14,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:14,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:27:14,830 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:14,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:14,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:14,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:14,834 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:14,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:14,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:27:14,837 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:14,870 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:27:14,870 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:27:14,871 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:27:14,871 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:27:14,919 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:14,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167931864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:14,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:27:14,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 04:27:14,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487632346] [2021-06-05 04:27:14,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:27:14,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:27:14,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:27:14,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:27:14,919 INFO L87 Difference]: Start difference. First operand 583 states and 1660 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:15,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:27:15,260 INFO L93 Difference]: Finished difference Result 645 states and 1769 transitions. [2021-06-05 04:27:15,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:27:15,261 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:27:15,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:27:15,261 INFO L225 Difference]: With dead ends: 645 [2021-06-05 04:27:15,261 INFO L226 Difference]: Without dead ends: 643 [2021-06-05 04:27:15,262 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 360.9ms TimeCoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:27:15,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2021-06-05 04:27:15,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 579. [2021-06-05 04:27:15,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 578 states have (on average 2.837370242214533) internal successors, (1640), 578 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:15,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 1640 transitions. [2021-06-05 04:27:15,267 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 1640 transitions. Word has length 17 [2021-06-05 04:27:15,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:27:15,267 INFO L482 AbstractCegarLoop]: Abstraction has 579 states and 1640 transitions. [2021-06-05 04:27:15,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:15,267 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 1640 transitions. [2021-06-05 04:27:15,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:27:15,268 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:27:15,268 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:27:15,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1531 [2021-06-05 04:27:15,468 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:27:15,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:27:15,468 INFO L82 PathProgramCache]: Analyzing trace with hash 791386684, now seen corresponding path program 198 times [2021-06-05 04:27:15,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:27:15,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234363966] [2021-06-05 04:27:15,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:27:15,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:27:15,539 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:15,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:27:15,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234363966] [2021-06-05 04:27:15,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234363966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:15,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137282454] [2021-06-05 04:27:15,540 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:15,567 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:27:15,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:27:15,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:27:15,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:27:15,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:15,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:15,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:27:15,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:15,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:15,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:15,686 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:15,708 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:27:15,708 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:27:15,709 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:27:15,709 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:27:15,729 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:15,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137282454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:15,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:27:15,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 04:27:15,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139745245] [2021-06-05 04:27:15,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:27:15,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:27:15,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:27:15,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:27:15,729 INFO L87 Difference]: Start difference. First operand 579 states and 1640 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:15,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:27:15,919 INFO L93 Difference]: Finished difference Result 674 states and 1852 transitions. [2021-06-05 04:27:15,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:27:15,919 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:27:15,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:27:15,920 INFO L225 Difference]: With dead ends: 674 [2021-06-05 04:27:15,920 INFO L226 Difference]: Without dead ends: 674 [2021-06-05 04:27:15,920 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 188.6ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:27:15,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2021-06-05 04:27:15,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 563. [2021-06-05 04:27:15,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 562 states have (on average 2.8505338078291813) internal successors, (1602), 562 states have internal predecessors, (1602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:15,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 1602 transitions. [2021-06-05 04:27:15,926 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 1602 transitions. Word has length 17 [2021-06-05 04:27:15,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:27:15,926 INFO L482 AbstractCegarLoop]: Abstraction has 563 states and 1602 transitions. [2021-06-05 04:27:15,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:15,927 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 1602 transitions. [2021-06-05 04:27:15,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:27:15,927 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:27:15,927 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:27:16,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1535,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:16,133 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:27:16,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:27:16,134 INFO L82 PathProgramCache]: Analyzing trace with hash -38966150, now seen corresponding path program 199 times [2021-06-05 04:27:16,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:27:16,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067750253] [2021-06-05 04:27:16,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:27:16,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:27:16,218 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:16,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:27:16,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067750253] [2021-06-05 04:27:16,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067750253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:16,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124698370] [2021-06-05 04:27:16,218 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:16,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:27:16,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:27:16,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:27:16,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:16,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:16,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:16,346 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:16,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:16,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:16,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:27:16,349 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:16,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:16,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:16,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:16,353 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:16,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:16,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:27:16,356 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:16,390 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:27:16,390 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:27:16,390 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:27:16,391 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:27:16,441 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:16,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124698370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:16,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:27:16,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 04:27:16,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522774527] [2021-06-05 04:27:16,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:27:16,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:27:16,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:27:16,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:27:16,442 INFO L87 Difference]: Start difference. First operand 563 states and 1602 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:16,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:27:16,802 INFO L93 Difference]: Finished difference Result 696 states and 1855 transitions. [2021-06-05 04:27:16,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:27:16,802 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:27:16,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:27:16,803 INFO L225 Difference]: With dead ends: 696 [2021-06-05 04:27:16,803 INFO L226 Difference]: Without dead ends: 694 [2021-06-05 04:27:16,803 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 330.0ms TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:27:16,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2021-06-05 04:27:16,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 579. [2021-06-05 04:27:16,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 578 states have (on average 2.868512110726644) internal successors, (1658), 578 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:16,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 1658 transitions. [2021-06-05 04:27:16,809 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 1658 transitions. Word has length 17 [2021-06-05 04:27:16,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:27:16,810 INFO L482 AbstractCegarLoop]: Abstraction has 579 states and 1658 transitions. [2021-06-05 04:27:16,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:16,810 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 1658 transitions. [2021-06-05 04:27:16,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:27:16,811 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:27:16,811 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:27:17,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1538,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:17,025 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:27:17,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:27:17,025 INFO L82 PathProgramCache]: Analyzing trace with hash 762650078, now seen corresponding path program 200 times [2021-06-05 04:27:17,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:27:17,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23837836] [2021-06-05 04:27:17,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:27:17,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:27:17,116 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:17,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:27:17,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23837836] [2021-06-05 04:27:17,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23837836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:17,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209975463] [2021-06-05 04:27:17,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:17,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:27:17,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:27:17,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:27:17,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:27:17,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:17,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:17,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:17,278 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:17,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:17,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:17,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:27:17,282 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:17,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:17,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:17,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:17,286 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:17,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:17,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:27:17,290 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:17,330 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:27:17,331 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:27:17,331 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:27:17,332 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:27:17,416 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:17,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209975463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:17,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:27:17,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 04:27:17,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812301398] [2021-06-05 04:27:17,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:27:17,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:27:17,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:27:17,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:27:17,417 INFO L87 Difference]: Start difference. First operand 579 states and 1658 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:18,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:27:18,197 INFO L93 Difference]: Finished difference Result 701 states and 1857 transitions. [2021-06-05 04:27:18,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 04:27:18,197 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:27:18,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:27:18,198 INFO L225 Difference]: With dead ends: 701 [2021-06-05 04:27:18,198 INFO L226 Difference]: Without dead ends: 691 [2021-06-05 04:27:18,198 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 781.3ms TimeCoverageRelationStatistics Valid=179, Invalid=1153, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 04:27:18,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2021-06-05 04:27:18,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 583. [2021-06-05 04:27:18,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 582 states have (on average 2.857388316151203) internal successors, (1663), 582 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:18,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 1663 transitions. [2021-06-05 04:27:18,204 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 1663 transitions. Word has length 17 [2021-06-05 04:27:18,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:27:18,204 INFO L482 AbstractCegarLoop]: Abstraction has 583 states and 1663 transitions. [2021-06-05 04:27:18,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:18,204 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 1663 transitions. [2021-06-05 04:27:18,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:27:18,205 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:27:18,205 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:27:18,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1542,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:18,406 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:27:18,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:27:18,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1813973512, now seen corresponding path program 201 times [2021-06-05 04:27:18,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:27:18,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318025798] [2021-06-05 04:27:18,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:27:18,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:27:18,510 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:18,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:27:18,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318025798] [2021-06-05 04:27:18,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318025798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:18,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568909788] [2021-06-05 04:27:18,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:18,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:27:18,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:27:18,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:27:18,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:27:18,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:18,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:18,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:18,676 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:18,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:18,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:18,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:27:18,680 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:18,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:18,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:18,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:18,684 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:18,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:18,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:27:18,688 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:18,727 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:27:18,727 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:27:18,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:27:18,728 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:27:18,783 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:18,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568909788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:18,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:27:18,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 04:27:18,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594211963] [2021-06-05 04:27:18,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:27:18,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:27:18,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:27:18,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:27:18,784 INFO L87 Difference]: Start difference. First operand 583 states and 1663 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:19,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:27:19,456 INFO L93 Difference]: Finished difference Result 688 states and 1832 transitions. [2021-06-05 04:27:19,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:27:19,456 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:27:19,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:27:19,457 INFO L225 Difference]: With dead ends: 688 [2021-06-05 04:27:19,457 INFO L226 Difference]: Without dead ends: 686 [2021-06-05 04:27:19,457 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 592.6ms TimeCoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:27:19,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2021-06-05 04:27:19,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 559. [2021-06-05 04:27:19,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 558 states have (on average 2.8297491039426523) internal successors, (1579), 558 states have internal predecessors, (1579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:19,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 1579 transitions. [2021-06-05 04:27:19,463 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 1579 transitions. Word has length 17 [2021-06-05 04:27:19,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:27:19,463 INFO L482 AbstractCegarLoop]: Abstraction has 559 states and 1579 transitions. [2021-06-05 04:27:19,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:19,463 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 1579 transitions. [2021-06-05 04:27:19,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:27:19,463 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:27:19,463 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:27:19,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1547,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:19,664 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:27:19,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:27:19,664 INFO L82 PathProgramCache]: Analyzing trace with hash 770380476, now seen corresponding path program 202 times [2021-06-05 04:27:19,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:27:19,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754300412] [2021-06-05 04:27:19,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:27:19,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:27:19,740 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:19,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:27:19,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754300412] [2021-06-05 04:27:19,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754300412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:19,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702757653] [2021-06-05 04:27:19,741 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:19,767 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:27:19,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:27:19,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:27:19,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:27:19,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:19,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:19,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:27:19,893 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:19,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:19,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:19,896 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:19,918 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:27:19,918 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:27:19,919 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:27:19,919 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:27:19,939 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:19,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702757653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:19,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:27:19,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 04:27:19,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095321193] [2021-06-05 04:27:19,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:27:19,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:27:19,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:27:19,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:27:19,940 INFO L87 Difference]: Start difference. First operand 559 states and 1579 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:20,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:27:20,401 INFO L93 Difference]: Finished difference Result 678 states and 1798 transitions. [2021-06-05 04:27:20,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:27:20,401 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:27:20,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:27:20,402 INFO L225 Difference]: With dead ends: 678 [2021-06-05 04:27:20,402 INFO L226 Difference]: Without dead ends: 678 [2021-06-05 04:27:20,402 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 436.1ms TimeCoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:27:20,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-06-05 04:27:20,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 553. [2021-06-05 04:27:20,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 552 states have (on average 2.8206521739130435) internal successors, (1557), 552 states have internal predecessors, (1557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:20,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 1557 transitions. [2021-06-05 04:27:20,408 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 1557 transitions. Word has length 17 [2021-06-05 04:27:20,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:27:20,408 INFO L482 AbstractCegarLoop]: Abstraction has 553 states and 1557 transitions. [2021-06-05 04:27:20,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:20,408 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 1557 transitions. [2021-06-05 04:27:20,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:27:20,408 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:27:20,408 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:27:20,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1551 [2021-06-05 04:27:20,609 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:27:20,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:27:20,609 INFO L82 PathProgramCache]: Analyzing trace with hash -719024520, now seen corresponding path program 203 times [2021-06-05 04:27:20,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:27:20,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460987968] [2021-06-05 04:27:20,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:27:20,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:27:20,701 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:20,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:27:20,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460987968] [2021-06-05 04:27:20,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460987968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:20,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927327780] [2021-06-05 04:27:20,701 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:20,743 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:27:20,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:27:20,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:27:20,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:27:20,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:20,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:20,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:20,879 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:20,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:20,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:27:20,882 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:20,904 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:27:20,905 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:27:20,905 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:27:20,905 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:27:20,926 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:20,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927327780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:20,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:27:20,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 04:27:20,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654201153] [2021-06-05 04:27:20,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:27:20,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:27:20,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:27:20,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:27:20,927 INFO L87 Difference]: Start difference. First operand 553 states and 1557 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:21,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:27:21,190 INFO L93 Difference]: Finished difference Result 643 states and 1726 transitions. [2021-06-05 04:27:21,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:27:21,191 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:27:21,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:27:21,192 INFO L225 Difference]: With dead ends: 643 [2021-06-05 04:27:21,192 INFO L226 Difference]: Without dead ends: 643 [2021-06-05 04:27:21,192 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 186.5ms TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:27:21,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2021-06-05 04:27:21,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 548. [2021-06-05 04:27:21,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 2.8153564899451555) internal successors, (1540), 547 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:21,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 1540 transitions. [2021-06-05 04:27:21,197 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 1540 transitions. Word has length 17 [2021-06-05 04:27:21,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:27:21,197 INFO L482 AbstractCegarLoop]: Abstraction has 548 states and 1540 transitions. [2021-06-05 04:27:21,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:21,197 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 1540 transitions. [2021-06-05 04:27:21,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:27:21,198 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:27:21,198 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:27:21,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1554 [2021-06-05 04:27:21,398 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:27:21,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:27:21,398 INFO L82 PathProgramCache]: Analyzing trace with hash -690158598, now seen corresponding path program 204 times [2021-06-05 04:27:21,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:27:21,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945252089] [2021-06-05 04:27:21,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:27:21,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:27:21,504 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:21,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:27:21,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945252089] [2021-06-05 04:27:21,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945252089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:21,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544783312] [2021-06-05 04:27:21,504 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:21,531 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:27:21,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:27:21,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:27:21,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:27:21,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:21,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:21,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:21,647 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:21,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:21,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:21,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:27:21,651 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:21,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:21,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:21,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:21,665 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:21,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:21,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:27:21,669 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:21,702 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:27:21,702 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:27:21,703 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:27:21,703 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:27:21,756 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:21,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544783312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:21,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:27:21,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:27:21,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598326918] [2021-06-05 04:27:21,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:27:21,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:27:21,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:27:21,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:27:21,756 INFO L87 Difference]: Start difference. First operand 548 states and 1540 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:22,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:27:22,074 INFO L93 Difference]: Finished difference Result 690 states and 1794 transitions. [2021-06-05 04:27:22,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:27:22,074 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:27:22,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:27:22,075 INFO L225 Difference]: With dead ends: 690 [2021-06-05 04:27:22,075 INFO L226 Difference]: Without dead ends: 690 [2021-06-05 04:27:22,075 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 356.6ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:27:22,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2021-06-05 04:27:22,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 566. [2021-06-05 04:27:22,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 565 states have (on average 2.831858407079646) internal successors, (1600), 565 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:22,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 1600 transitions. [2021-06-05 04:27:22,081 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 1600 transitions. Word has length 17 [2021-06-05 04:27:22,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:27:22,081 INFO L482 AbstractCegarLoop]: Abstraction has 566 states and 1600 transitions. [2021-06-05 04:27:22,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:22,081 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 1600 transitions. [2021-06-05 04:27:22,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:27:22,082 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:27:22,082 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:27:22,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1557 [2021-06-05 04:27:22,282 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:27:22,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:27:22,283 INFO L82 PathProgramCache]: Analyzing trace with hash 111457630, now seen corresponding path program 205 times [2021-06-05 04:27:22,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:27:22,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485448447] [2021-06-05 04:27:22,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:27:22,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:27:22,376 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:22,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:27:22,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485448447] [2021-06-05 04:27:22,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485448447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:22,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265667175] [2021-06-05 04:27:22,376 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:22,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:27:22,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:27:22,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:27:22,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:22,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:22,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:22,522 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:22,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:22,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:22,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:27:22,525 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:22,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:22,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:22,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:22,529 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:22,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:22,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:27:22,532 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:22,566 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:27:22,566 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:27:22,566 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:27:22,566 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:27:22,638 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:22,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265667175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:22,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:27:22,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:27:22,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584522940] [2021-06-05 04:27:22,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:27:22,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:27:22,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:27:22,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:27:22,639 INFO L87 Difference]: Start difference. First operand 566 states and 1600 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:23,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:27:23,591 INFO L93 Difference]: Finished difference Result 716 states and 1856 transitions. [2021-06-05 04:27:23,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 04:27:23,591 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:27:23,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:27:23,592 INFO L225 Difference]: With dead ends: 716 [2021-06-05 04:27:23,592 INFO L226 Difference]: Without dead ends: 706 [2021-06-05 04:27:23,592 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 871.2ms TimeCoverageRelationStatistics Valid=197, Invalid=1443, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 04:27:23,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2021-06-05 04:27:23,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 578. [2021-06-05 04:27:23,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 577 states have (on average 2.8405545927209706) internal successors, (1639), 577 states have internal predecessors, (1639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:23,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 1639 transitions. [2021-06-05 04:27:23,598 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 1639 transitions. Word has length 17 [2021-06-05 04:27:23,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:27:23,598 INFO L482 AbstractCegarLoop]: Abstraction has 578 states and 1639 transitions. [2021-06-05 04:27:23,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:23,598 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 1639 transitions. [2021-06-05 04:27:23,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:27:23,599 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:27:23,599 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:27:23,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1561 [2021-06-05 04:27:23,799 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:27:23,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:27:23,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1829801336, now seen corresponding path program 206 times [2021-06-05 04:27:23,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:27:23,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570028883] [2021-06-05 04:27:23,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:27:23,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:27:23,893 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:23,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:27:23,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570028883] [2021-06-05 04:27:23,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570028883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:23,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782469785] [2021-06-05 04:27:23,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:23,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:27:23,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:27:23,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:27:23,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:27:24,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:24,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:24,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:24,038 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:24,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:24,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:24,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:27:24,042 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:24,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:24,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:24,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:24,045 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:24,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:24,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:27:24,048 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:24,082 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:27:24,082 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:27:24,083 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:27:24,083 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:27:24,131 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:24,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782469785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:24,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:27:24,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:27:24,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355240844] [2021-06-05 04:27:24,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:27:24,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:27:24,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:27:24,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:27:24,132 INFO L87 Difference]: Start difference. First operand 578 states and 1639 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:24,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:27:24,596 INFO L93 Difference]: Finished difference Result 672 states and 1791 transitions. [2021-06-05 04:27:24,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:27:24,596 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:27:24,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:27:24,597 INFO L225 Difference]: With dead ends: 672 [2021-06-05 04:27:24,597 INFO L226 Difference]: Without dead ends: 672 [2021-06-05 04:27:24,597 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 442.6ms TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:27:24,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-06-05 04:27:24,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 574. [2021-06-05 04:27:24,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 573 states have (on average 2.832460732984293) internal successors, (1623), 573 states have internal predecessors, (1623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:24,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 1623 transitions. [2021-06-05 04:27:24,603 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 1623 transitions. Word has length 17 [2021-06-05 04:27:24,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:27:24,603 INFO L482 AbstractCegarLoop]: Abstraction has 574 states and 1623 transitions. [2021-06-05 04:27:24,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:24,603 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 1623 transitions. [2021-06-05 04:27:24,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:27:24,603 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:27:24,604 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:27:24,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1566,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:24,804 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:27:24,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:27:24,804 INFO L82 PathProgramCache]: Analyzing trace with hash 119188028, now seen corresponding path program 207 times [2021-06-05 04:27:24,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:27:24,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769755219] [2021-06-05 04:27:24,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:27:24,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:27:24,888 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:24,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:27:24,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769755219] [2021-06-05 04:27:24,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769755219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:24,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353934827] [2021-06-05 04:27:24,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:24,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:27:24,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:27:24,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:27:24,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:27:25,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:25,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:25,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:27:25,060 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:25,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:25,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:25,063 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:25,085 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:27:25,086 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:27:25,086 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:27:25,086 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:27:25,108 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:25,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353934827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:25,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:27:25,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:27:25,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423730716] [2021-06-05 04:27:25,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:27:25,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:27:25,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:27:25,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:27:25,109 INFO L87 Difference]: Start difference. First operand 574 states and 1623 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:25,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:27:25,810 INFO L93 Difference]: Finished difference Result 736 states and 1924 transitions. [2021-06-05 04:27:25,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 04:27:25,811 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:27:25,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:27:25,811 INFO L225 Difference]: With dead ends: 736 [2021-06-05 04:27:25,811 INFO L226 Difference]: Without dead ends: 736 [2021-06-05 04:27:25,812 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 612.6ms TimeCoverageRelationStatistics Valid=161, Invalid=1099, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 04:27:25,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2021-06-05 04:27:25,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 584. [2021-06-05 04:27:25,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 583 states have (on average 2.8456260720411666) internal successors, (1659), 583 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:25,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 1659 transitions. [2021-06-05 04:27:25,817 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 1659 transitions. Word has length 17 [2021-06-05 04:27:25,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:27:25,817 INFO L482 AbstractCegarLoop]: Abstraction has 584 states and 1659 transitions. [2021-06-05 04:27:25,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:25,817 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 1659 transitions. [2021-06-05 04:27:25,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:27:25,818 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:27:25,818 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:27:26,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1570,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:26,019 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:27:26,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:27:26,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1370216968, now seen corresponding path program 208 times [2021-06-05 04:27:26,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:27:26,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439308518] [2021-06-05 04:27:26,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:27:26,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:27:26,099 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:26,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:27:26,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439308518] [2021-06-05 04:27:26,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439308518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:26,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849592302] [2021-06-05 04:27:26,099 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:26,126 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:27:26,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:27:26,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:27:26,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:27:26,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:26,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:26,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:26,264 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:26,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:26,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:27:26,267 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:26,294 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:27:26,294 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:27:26,295 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:27:26,295 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:27:26,316 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:26,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849592302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:26,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:27:26,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:27:26,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783703219] [2021-06-05 04:27:26,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:27:26,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:27:26,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:27:26,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:27:26,317 INFO L87 Difference]: Start difference. First operand 584 states and 1659 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:27,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:27:27,363 INFO L93 Difference]: Finished difference Result 734 states and 1938 transitions. [2021-06-05 04:27:27,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 04:27:27,363 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:27:27,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:27:27,364 INFO L225 Difference]: With dead ends: 734 [2021-06-05 04:27:27,364 INFO L226 Difference]: Without dead ends: 734 [2021-06-05 04:27:27,364 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 855.8ms TimeCoverageRelationStatistics Valid=276, Invalid=1886, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 04:27:27,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2021-06-05 04:27:27,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 574. [2021-06-05 04:27:27,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 573 states have (on average 2.832460732984293) internal successors, (1623), 573 states have internal predecessors, (1623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:27,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 1623 transitions. [2021-06-05 04:27:27,370 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 1623 transitions. Word has length 17 [2021-06-05 04:27:27,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:27:27,370 INFO L482 AbstractCegarLoop]: Abstraction has 574 states and 1623 transitions. [2021-06-05 04:27:27,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:27,370 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 1623 transitions. [2021-06-05 04:27:27,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:27:27,370 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:27:27,370 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:27:27,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1573,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:27,571 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:27:27,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:27:27,571 INFO L82 PathProgramCache]: Analyzing trace with hash -297131588, now seen corresponding path program 209 times [2021-06-05 04:27:27,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:27:27,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120657449] [2021-06-05 04:27:27,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:27:27,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:27:27,655 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:27,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:27:27,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120657449] [2021-06-05 04:27:27,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120657449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:27,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903565534] [2021-06-05 04:27:27,656 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:27,684 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:27:27,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:27:27,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:27:27,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:27:27,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:27,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:27,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:27:27,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:27,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:27,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:27,824 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:27,846 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:27:27,847 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:27:27,847 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:27:27,847 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:27:27,869 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:27,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903565534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:27,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:27:27,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:27:27,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683608337] [2021-06-05 04:27:27,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:27:27,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:27:27,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:27:27,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:27:27,870 INFO L87 Difference]: Start difference. First operand 574 states and 1623 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:28,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:27:28,087 INFO L93 Difference]: Finished difference Result 624 states and 1716 transitions. [2021-06-05 04:27:28,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:27:28,088 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:27:28,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:27:28,088 INFO L225 Difference]: With dead ends: 624 [2021-06-05 04:27:28,088 INFO L226 Difference]: Without dead ends: 624 [2021-06-05 04:27:28,089 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 185.8ms TimeCoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:27:28,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2021-06-05 04:27:28,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 574. [2021-06-05 04:27:28,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 573 states have (on average 2.832460732984293) internal successors, (1623), 573 states have internal predecessors, (1623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:28,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 1623 transitions. [2021-06-05 04:27:28,094 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 1623 transitions. Word has length 17 [2021-06-05 04:27:28,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:27:28,094 INFO L482 AbstractCegarLoop]: Abstraction has 574 states and 1623 transitions. [2021-06-05 04:27:28,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:28,094 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 1623 transitions. [2021-06-05 04:27:28,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:27:28,095 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:27:28,095 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:27:28,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1576 [2021-06-05 04:27:28,295 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:27:28,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:27:28,295 INFO L82 PathProgramCache]: Analyzing trace with hash 906074430, now seen corresponding path program 210 times [2021-06-05 04:27:28,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:27:28,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198716013] [2021-06-05 04:27:28,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:27:28,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:27:28,377 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:28,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:27:28,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198716013] [2021-06-05 04:27:28,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198716013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:28,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976813910] [2021-06-05 04:27:28,378 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:28,405 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:27:28,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:27:28,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:27:28,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:27:28,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:28,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:28,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:27:28,542 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:28,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:28,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:28,545 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:28,563 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-06-05 04:27:28,563 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:27:28,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:27:28,563 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-06-05 04:27:28,587 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:28,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976813910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:28,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:27:28,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:27:28,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54775545] [2021-06-05 04:27:28,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:27:28,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:27:28,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:27:28,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:27:28,588 INFO L87 Difference]: Start difference. First operand 574 states and 1623 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:28,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:27:28,833 INFO L93 Difference]: Finished difference Result 706 states and 1888 transitions. [2021-06-05 04:27:28,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:27:28,834 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:27:28,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:27:28,834 INFO L225 Difference]: With dead ends: 706 [2021-06-05 04:27:28,835 INFO L226 Difference]: Without dead ends: 706 [2021-06-05 04:27:28,835 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 199.4ms TimeCoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:27:28,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2021-06-05 04:27:28,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 613. [2021-06-05 04:27:28,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 613 states, 612 states have (on average 2.8643790849673203) internal successors, (1753), 612 states have internal predecessors, (1753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:28,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 1753 transitions. [2021-06-05 04:27:28,842 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 1753 transitions. Word has length 17 [2021-06-05 04:27:28,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:27:28,842 INFO L482 AbstractCegarLoop]: Abstraction has 613 states and 1753 transitions. [2021-06-05 04:27:28,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:28,842 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 1753 transitions. [2021-06-05 04:27:28,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:27:28,843 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:27:28,843 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:27:29,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1579,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:29,065 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:27:29,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:27:29,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1836957018, now seen corresponding path program 211 times [2021-06-05 04:27:29,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:27:29,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495982189] [2021-06-05 04:27:29,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:27:29,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:27:29,146 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:29,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:27:29,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495982189] [2021-06-05 04:27:29,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495982189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:29,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706012914] [2021-06-05 04:27:29,146 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:29,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:27:29,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:27:29,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:27:29,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:27:29,315 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:29,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:29,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:29,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:29,321 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:29,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:27:29,325 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:29,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:29,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:29,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:27:29,330 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:29,332 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:27:29,333 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:29,335 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:27:29,336 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:29,367 INFO L628 ElimStorePlain]: treesize reduction 21, result has 58.0 percent of original size [2021-06-05 04:27:29,367 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:27:29,368 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:27:29,368 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-06-05 04:27:29,400 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:29,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706012914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:29,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:27:29,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:27:29,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139596862] [2021-06-05 04:27:29,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:27:29,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:27:29,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:27:29,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:27:29,401 INFO L87 Difference]: Start difference. First operand 613 states and 1753 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:29,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:27:29,834 INFO L93 Difference]: Finished difference Result 692 states and 1851 transitions. [2021-06-05 04:27:29,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:27:29,834 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:27:29,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:27:29,835 INFO L225 Difference]: With dead ends: 692 [2021-06-05 04:27:29,835 INFO L226 Difference]: Without dead ends: 684 [2021-06-05 04:27:29,835 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 408.3ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:27:29,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2021-06-05 04:27:29,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 619. [2021-06-05 04:27:29,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 618 states have (on average 2.8462783171521036) internal successors, (1759), 618 states have internal predecessors, (1759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:29,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 1759 transitions. [2021-06-05 04:27:29,848 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 1759 transitions. Word has length 17 [2021-06-05 04:27:29,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:27:29,848 INFO L482 AbstractCegarLoop]: Abstraction has 619 states and 1759 transitions. [2021-06-05 04:27:29,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:29,848 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 1759 transitions. [2021-06-05 04:27:29,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:27:29,848 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:27:29,849 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:27:30,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1581,216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:30,049 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:27:30,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:27:30,049 INFO L82 PathProgramCache]: Analyzing trace with hash -254947684, now seen corresponding path program 212 times [2021-06-05 04:27:30,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:27:30,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460243262] [2021-06-05 04:27:30,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:27:30,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:27:30,129 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:30,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:27:30,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460243262] [2021-06-05 04:27:30,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460243262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:30,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655136456] [2021-06-05 04:27:30,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:30,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:27:30,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:27:30,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:27:30,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:27:30,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:30,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:30,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:27:30,295 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:30,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:30,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:30,298 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:30,316 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-06-05 04:27:30,316 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:27:30,316 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:27:30,316 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-06-05 04:27:30,340 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:30,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655136456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:30,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:27:30,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:27:30,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962505095] [2021-06-05 04:27:30,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:27:30,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:27:30,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:27:30,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:27:30,340 INFO L87 Difference]: Start difference. First operand 619 states and 1759 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:31,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:27:31,276 INFO L93 Difference]: Finished difference Result 784 states and 2026 transitions. [2021-06-05 04:27:31,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 04:27:31,277 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:27:31,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:27:31,277 INFO L225 Difference]: With dead ends: 784 [2021-06-05 04:27:31,278 INFO L226 Difference]: Without dead ends: 780 [2021-06-05 04:27:31,278 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 843.9ms TimeCoverageRelationStatistics Valid=256, Invalid=1814, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 04:27:31,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2021-06-05 04:27:31,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 614. [2021-06-05 04:27:31,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 613 states have (on average 2.858075040783034) internal successors, (1752), 613 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:31,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 1752 transitions. [2021-06-05 04:27:31,285 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 1752 transitions. Word has length 17 [2021-06-05 04:27:31,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:27:31,285 INFO L482 AbstractCegarLoop]: Abstraction has 614 states and 1752 transitions. [2021-06-05 04:27:31,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:31,285 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 1752 transitions. [2021-06-05 04:27:31,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:27:31,286 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:27:31,286 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:27:31,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1586 [2021-06-05 04:27:31,489 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:27:31,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:27:31,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1299101440, now seen corresponding path program 213 times [2021-06-05 04:27:31,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:27:31,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203723161] [2021-06-05 04:27:31,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:27:31,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:27:31,573 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:31,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:27:31,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203723161] [2021-06-05 04:27:31,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203723161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:31,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183496744] [2021-06-05 04:27:31,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:31,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:27:31,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:27:31,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:27:31,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:27:31,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:27:31,754 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:31,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:31,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:31,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:31,757 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:31,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:27:31,760 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:31,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:31,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:31,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:27:31,764 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:31,766 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:27:31,766 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:31,768 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:27:31,768 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:31,796 INFO L628 ElimStorePlain]: treesize reduction 21, result has 58.0 percent of original size [2021-06-05 04:27:31,797 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:27:31,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:27:31,797 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-06-05 04:27:31,830 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:31,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183496744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:31,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:27:31,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:27:31,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046592630] [2021-06-05 04:27:31,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:27:31,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:27:31,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:27:31,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:27:31,831 INFO L87 Difference]: Start difference. First operand 614 states and 1752 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:32,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:27:32,434 INFO L93 Difference]: Finished difference Result 701 states and 1867 transitions. [2021-06-05 04:27:32,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 04:27:32,435 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:27:32,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:27:32,435 INFO L225 Difference]: With dead ends: 701 [2021-06-05 04:27:32,435 INFO L226 Difference]: Without dead ends: 695 [2021-06-05 04:27:32,436 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 596.9ms TimeCoverageRelationStatistics Valid=166, Invalid=1240, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 04:27:32,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2021-06-05 04:27:32,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 617. [2021-06-05 04:27:32,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 616 states have (on average 2.8490259740259742) internal successors, (1755), 616 states have internal predecessors, (1755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:32,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 1755 transitions. [2021-06-05 04:27:32,442 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 1755 transitions. Word has length 17 [2021-06-05 04:27:32,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:27:32,442 INFO L482 AbstractCegarLoop]: Abstraction has 617 states and 1755 transitions. [2021-06-05 04:27:32,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:32,443 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 1755 transitions. [2021-06-05 04:27:32,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:27:32,443 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:27:32,443 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:27:32,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1588,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:32,666 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:27:32,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:27:32,666 INFO L82 PathProgramCache]: Analyzing trace with hash -15305346, now seen corresponding path program 214 times [2021-06-05 04:27:32,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:27:32,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635421810] [2021-06-05 04:27:32,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:27:32,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:27:32,753 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:32,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:27:32,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635421810] [2021-06-05 04:27:32,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635421810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:32,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068392903] [2021-06-05 04:27:32,753 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:32,779 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:27:32,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:27:32,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:27:32,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:27:32,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:32,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:32,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:27:32,926 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:32,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:32,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:32,929 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:32,946 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-06-05 04:27:32,947 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:27:32,947 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:27:32,947 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-06-05 04:27:32,970 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:32,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068392903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:32,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:27:32,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:27:32,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605933362] [2021-06-05 04:27:32,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:27:32,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:27:32,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:27:32,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:27:32,971 INFO L87 Difference]: Start difference. First operand 617 states and 1755 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:33,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:27:33,836 INFO L93 Difference]: Finished difference Result 784 states and 2032 transitions. [2021-06-05 04:27:33,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 04:27:33,837 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:27:33,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:27:33,838 INFO L225 Difference]: With dead ends: 784 [2021-06-05 04:27:33,838 INFO L226 Difference]: Without dead ends: 779 [2021-06-05 04:27:33,838 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 714.8ms TimeCoverageRelationStatistics Valid=197, Invalid=1443, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 04:27:33,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2021-06-05 04:27:33,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 621. [2021-06-05 04:27:33,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 620 states have (on average 2.861290322580645) internal successors, (1774), 620 states have internal predecessors, (1774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:33,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 1774 transitions. [2021-06-05 04:27:33,845 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 1774 transitions. Word has length 17 [2021-06-05 04:27:33,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:27:33,845 INFO L482 AbstractCegarLoop]: Abstraction has 621 states and 1774 transitions. [2021-06-05 04:27:33,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:33,845 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 1774 transitions. [2021-06-05 04:27:33,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:27:33,846 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:27:33,846 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:27:34,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1593,219 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:34,046 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:27:34,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:27:34,047 INFO L82 PathProgramCache]: Analyzing trace with hash -935006054, now seen corresponding path program 215 times [2021-06-05 04:27:34,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:27:34,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766064752] [2021-06-05 04:27:34,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:27:34,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:27:34,152 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:34,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:27:34,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766064752] [2021-06-05 04:27:34,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766064752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:34,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462208884] [2021-06-05 04:27:34,152 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:34,188 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:27:34,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:27:34,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:27:34,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:27:34,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:27:34,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:34,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:34,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:34,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:34,367 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:34,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:27:34,371 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:34,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:34,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:34,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:27:34,376 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:34,378 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:27:34,379 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:34,381 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:27:34,382 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:34,419 INFO L628 ElimStorePlain]: treesize reduction 21, result has 58.0 percent of original size [2021-06-05 04:27:34,419 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:27:34,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:27:34,420 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-06-05 04:27:34,453 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:34,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462208884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:34,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:27:34,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:27:34,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136018253] [2021-06-05 04:27:34,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:27:34,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:27:34,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:27:34,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:27:34,454 INFO L87 Difference]: Start difference. First operand 621 states and 1774 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:35,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:27:35,097 INFO L93 Difference]: Finished difference Result 681 states and 1857 transitions. [2021-06-05 04:27:35,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:27:35,098 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:27:35,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:27:35,099 INFO L225 Difference]: With dead ends: 681 [2021-06-05 04:27:35,099 INFO L226 Difference]: Without dead ends: 677 [2021-06-05 04:27:35,099 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 621.1ms TimeCoverageRelationStatistics Valid=152, Invalid=1038, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:27:35,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2021-06-05 04:27:35,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 622. [2021-06-05 04:27:35,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 621 states have (on average 2.848631239935588) internal successors, (1769), 621 states have internal predecessors, (1769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:35,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 1769 transitions. [2021-06-05 04:27:35,105 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 1769 transitions. Word has length 17 [2021-06-05 04:27:35,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:27:35,105 INFO L482 AbstractCegarLoop]: Abstraction has 622 states and 1769 transitions. [2021-06-05 04:27:35,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:35,105 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 1769 transitions. [2021-06-05 04:27:35,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:27:35,106 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:27:35,106 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:27:35,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1595 [2021-06-05 04:27:35,306 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:27:35,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:27:35,306 INFO L82 PathProgramCache]: Analyzing trace with hash -7574948, now seen corresponding path program 216 times [2021-06-05 04:27:35,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:27:35,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093884328] [2021-06-05 04:27:35,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:27:35,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:27:35,399 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:35,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:27:35,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093884328] [2021-06-05 04:27:35,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093884328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:35,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933523257] [2021-06-05 04:27:35,400 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:35,427 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:27:35,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:27:35,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:27:35,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:27:35,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:35,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:35,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:35,586 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:35,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:35,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:35,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:27:35,589 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:35,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:35,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:35,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:35,593 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:35,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:35,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:27:35,596 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:35,630 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:27:35,630 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:27:35,630 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:27:35,630 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:27:35,684 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:35,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933523257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:35,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:27:35,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:27:35,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630698039] [2021-06-05 04:27:35,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:27:35,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:27:35,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:27:35,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:27:35,685 INFO L87 Difference]: Start difference. First operand 622 states and 1769 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:36,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:27:36,268 INFO L93 Difference]: Finished difference Result 783 states and 1990 transitions. [2021-06-05 04:27:36,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:27:36,268 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:27:36,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:27:36,269 INFO L225 Difference]: With dead ends: 783 [2021-06-05 04:27:36,269 INFO L226 Difference]: Without dead ends: 781 [2021-06-05 04:27:36,269 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 551.8ms TimeCoverageRelationStatistics Valid=142, Invalid=850, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:27:36,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2021-06-05 04:27:36,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 603. [2021-06-05 04:27:36,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 602 states have (on average 2.835548172757475) internal successors, (1707), 602 states have internal predecessors, (1707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:36,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 1707 transitions. [2021-06-05 04:27:36,276 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 1707 transitions. Word has length 17 [2021-06-05 04:27:36,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:27:36,276 INFO L482 AbstractCegarLoop]: Abstraction has 603 states and 1707 transitions. [2021-06-05 04:27:36,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:36,276 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 1707 transitions. [2021-06-05 04:27:36,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:27:36,277 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:27:36,277 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:27:36,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1600,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:36,477 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:27:36,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:27:36,477 INFO L82 PathProgramCache]: Analyzing trace with hash 794041280, now seen corresponding path program 217 times [2021-06-05 04:27:36,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:27:36,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205018631] [2021-06-05 04:27:36,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:27:36,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:27:36,569 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:36,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:27:36,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205018631] [2021-06-05 04:27:36,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205018631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:36,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8993960] [2021-06-05 04:27:36,569 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:36,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:27:36,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:27:36,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:27:36,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:36,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:36,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:36,744 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:36,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:36,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:36,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:27:36,748 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:36,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:36,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:36,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:36,751 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:36,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:36,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:27:36,755 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:36,788 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:27:36,788 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:27:36,789 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:27:36,789 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:27:36,862 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:36,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8993960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:36,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:27:36,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:27:36,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320269713] [2021-06-05 04:27:36,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:27:36,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:27:36,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:27:36,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:27:36,863 INFO L87 Difference]: Start difference. First operand 603 states and 1707 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:37,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:27:37,418 INFO L93 Difference]: Finished difference Result 687 states and 1842 transitions. [2021-06-05 04:27:37,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:27:37,418 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:27:37,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:27:37,419 INFO L225 Difference]: With dead ends: 687 [2021-06-05 04:27:37,419 INFO L226 Difference]: Without dead ends: 683 [2021-06-05 04:27:37,419 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 617.9ms TimeCoverageRelationStatistics Valid=149, Invalid=907, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:27:37,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2021-06-05 04:27:37,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 607. [2021-06-05 04:27:37,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 606 states have (on average 2.8333333333333335) internal successors, (1717), 606 states have internal predecessors, (1717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:37,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 1717 transitions. [2021-06-05 04:27:37,425 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 1717 transitions. Word has length 17 [2021-06-05 04:27:37,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:27:37,425 INFO L482 AbstractCegarLoop]: Abstraction has 607 states and 1717 transitions. [2021-06-05 04:27:37,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:37,425 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 1717 transitions. [2021-06-05 04:27:37,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:27:37,426 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:27:37,426 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:27:37,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1604 [2021-06-05 04:27:37,626 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:27:37,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:27:37,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1782582310, now seen corresponding path program 218 times [2021-06-05 04:27:37,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:27:37,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935392612] [2021-06-05 04:27:37,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:27:37,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:27:37,719 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:37,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:27:37,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935392612] [2021-06-05 04:27:37,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935392612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:37,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086111646] [2021-06-05 04:27:37,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:37,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:27:37,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:27:37,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:27:37,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:27:37,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:37,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:37,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:37,877 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:37,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:37,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:37,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:27:37,880 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:37,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:37,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:37,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:37,884 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:37,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:37,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:27:37,887 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:37,921 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:27:37,922 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:27:37,922 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:27:37,922 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:27:37,975 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:37,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086111646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:37,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:27:37,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:27:37,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921839917] [2021-06-05 04:27:37,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:27:37,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:27:37,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:27:37,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:27:37,976 INFO L87 Difference]: Start difference. First operand 607 states and 1717 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:38,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:27:38,334 INFO L93 Difference]: Finished difference Result 678 states and 1827 transitions. [2021-06-05 04:27:38,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:27:38,334 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:27:38,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:27:38,335 INFO L225 Difference]: With dead ends: 678 [2021-06-05 04:27:38,335 INFO L226 Difference]: Without dead ends: 678 [2021-06-05 04:27:38,335 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 411.1ms TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:27:38,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-06-05 04:27:38,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 592. [2021-06-05 04:27:38,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 591 states have (on average 2.83248730964467) internal successors, (1674), 591 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:38,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 1674 transitions. [2021-06-05 04:27:38,341 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 1674 transitions. Word has length 17 [2021-06-05 04:27:38,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:27:38,341 INFO L482 AbstractCegarLoop]: Abstraction has 592 states and 1674 transitions. [2021-06-05 04:27:38,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:38,341 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 1674 transitions. [2021-06-05 04:27:38,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:27:38,342 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:27:38,342 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:27:38,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1609,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:38,542 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:27:38,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:27:38,542 INFO L82 PathProgramCache]: Analyzing trace with hash 505854650, now seen corresponding path program 219 times [2021-06-05 04:27:38,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:27:38,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536763475] [2021-06-05 04:27:38,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:27:38,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:27:38,615 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:27:38,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:27:38,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536763475] [2021-06-05 04:27:38,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536763475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:38,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566315548] [2021-06-05 04:27:38,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:38,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:27:38,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:27:38,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:27:38,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:27:38,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:38,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:38,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:38,766 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:38,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:38,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:38,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:27:38,770 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:38,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:38,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:38,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:38,773 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:38,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:38,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:27:38,777 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:38,810 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:27:38,810 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:27:38,811 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:27:38,811 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:27:38,875 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:38,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566315548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:38,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:27:38,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 04:27:38,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656938790] [2021-06-05 04:27:38,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:27:38,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:27:38,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:27:38,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:27:38,876 INFO L87 Difference]: Start difference. First operand 592 states and 1674 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:39,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:27:39,433 INFO L93 Difference]: Finished difference Result 624 states and 1727 transitions. [2021-06-05 04:27:39,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:27:39,433 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:27:39,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:27:39,434 INFO L225 Difference]: With dead ends: 624 [2021-06-05 04:27:39,434 INFO L226 Difference]: Without dead ends: 620 [2021-06-05 04:27:39,434 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 574.7ms TimeCoverageRelationStatistics Valid=151, Invalid=971, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 04:27:39,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2021-06-05 04:27:39,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 594. [2021-06-05 04:27:39,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 593 states have (on average 2.8279932546374367) internal successors, (1677), 593 states have internal predecessors, (1677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:39,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 1677 transitions. [2021-06-05 04:27:39,440 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 1677 transitions. Word has length 17 [2021-06-05 04:27:39,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:27:39,440 INFO L482 AbstractCegarLoop]: Abstraction has 594 states and 1677 transitions. [2021-06-05 04:27:39,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:39,440 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 1677 transitions. [2021-06-05 04:27:39,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:27:39,441 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:27:39,441 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:27:39,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1613 [2021-06-05 04:27:39,641 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:27:39,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:27:39,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1517986152, now seen corresponding path program 220 times [2021-06-05 04:27:39,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:27:39,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158759480] [2021-06-05 04:27:39,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:27:39,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:27:39,716 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:39,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:27:39,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158759480] [2021-06-05 04:27:39,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158759480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:39,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111573698] [2021-06-05 04:27:39,716 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:39,742 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:27:39,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:27:39,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:27:39,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:27:39,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:39,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:39,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:39,842 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:39,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:39,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:39,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:27:39,845 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:39,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:39,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:39,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:39,849 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:39,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:39,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:27:39,852 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:39,885 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:27:39,886 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:27:39,886 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:27:39,886 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:27:39,936 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:39,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111573698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:39,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:27:39,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 04:27:39,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631595298] [2021-06-05 04:27:39,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:27:39,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:27:39,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:27:39,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:27:39,937 INFO L87 Difference]: Start difference. First operand 594 states and 1677 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:40,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:27:40,266 INFO L93 Difference]: Finished difference Result 722 states and 1901 transitions. [2021-06-05 04:27:40,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:27:40,267 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:27:40,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:27:40,267 INFO L225 Difference]: With dead ends: 722 [2021-06-05 04:27:40,267 INFO L226 Difference]: Without dead ends: 722 [2021-06-05 04:27:40,268 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 280.0ms TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:27:40,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2021-06-05 04:27:40,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 606. [2021-06-05 04:27:40,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 605 states have (on average 2.8413223140495867) internal successors, (1719), 605 states have internal predecessors, (1719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:40,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 1719 transitions. [2021-06-05 04:27:40,273 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 1719 transitions. Word has length 17 [2021-06-05 04:27:40,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:27:40,274 INFO L482 AbstractCegarLoop]: Abstraction has 606 states and 1719 transitions. [2021-06-05 04:27:40,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:40,274 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 1719 transitions. [2021-06-05 04:27:40,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:27:40,274 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:27:40,274 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:27:40,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1619,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:40,475 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:27:40,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:27:40,475 INFO L82 PathProgramCache]: Analyzing trace with hash -716369924, now seen corresponding path program 221 times [2021-06-05 04:27:40,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:27:40,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016318349] [2021-06-05 04:27:40,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:27:40,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:27:40,544 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:40,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:27:40,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016318349] [2021-06-05 04:27:40,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016318349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:40,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319867220] [2021-06-05 04:27:40,545 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:40,573 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:27:40,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:27:40,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:27:40,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:27:40,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:40,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:40,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:40,679 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:40,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:40,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:40,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:27:40,683 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:40,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:40,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:40,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:40,686 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:40,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:40,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:27:40,689 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:40,722 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:27:40,722 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:27:40,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:27:40,723 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:27:40,791 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:40,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319867220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:40,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:27:40,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 04:27:40,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882413019] [2021-06-05 04:27:40,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:27:40,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:27:40,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:27:40,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:27:40,792 INFO L87 Difference]: Start difference. First operand 606 states and 1719 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:41,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:27:41,323 INFO L93 Difference]: Finished difference Result 766 states and 2029 transitions. [2021-06-05 04:27:41,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 04:27:41,323 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:27:41,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:27:41,324 INFO L225 Difference]: With dead ends: 766 [2021-06-05 04:27:41,324 INFO L226 Difference]: Without dead ends: 760 [2021-06-05 04:27:41,324 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 482.9ms TimeCoverageRelationStatistics Valid=127, Invalid=803, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:27:41,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2021-06-05 04:27:41,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 655. [2021-06-05 04:27:41,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 654 states have (on average 2.853211009174312) internal successors, (1866), 654 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:41,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 1866 transitions. [2021-06-05 04:27:41,331 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 1866 transitions. Word has length 17 [2021-06-05 04:27:41,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:27:41,331 INFO L482 AbstractCegarLoop]: Abstraction has 655 states and 1866 transitions. [2021-06-05 04:27:41,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:41,331 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 1866 transitions. [2021-06-05 04:27:41,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:27:41,332 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:27:41,332 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:27:41,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1623 [2021-06-05 04:27:41,533 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:27:41,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:27:41,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1001973782, now seen corresponding path program 222 times [2021-06-05 04:27:41,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:27:41,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92015714] [2021-06-05 04:27:41,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:27:41,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:27:41,635 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:41,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:27:41,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92015714] [2021-06-05 04:27:41,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92015714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:41,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059917229] [2021-06-05 04:27:41,635 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:41,663 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:27:41,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:27:41,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:27:41,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:27:41,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:41,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:41,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:41,763 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:41,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:41,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:41,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:27:41,767 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:41,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:41,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:41,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:41,770 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:41,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:41,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:27:41,773 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:41,812 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:27:41,812 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:27:41,813 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:27:41,813 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:27:41,860 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:41,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059917229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:41,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:27:41,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 04:27:41,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446520021] [2021-06-05 04:27:41,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:27:41,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:27:41,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:27:41,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:27:41,861 INFO L87 Difference]: Start difference. First operand 655 states and 1866 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:42,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:27:42,158 INFO L93 Difference]: Finished difference Result 739 states and 1992 transitions. [2021-06-05 04:27:42,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:27:42,159 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:27:42,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:27:42,160 INFO L225 Difference]: With dead ends: 739 [2021-06-05 04:27:42,160 INFO L226 Difference]: Without dead ends: 739 [2021-06-05 04:27:42,160 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 309.4ms TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:27:42,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2021-06-05 04:27:42,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 649. [2021-06-05 04:27:42,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 648 states have (on average 2.8410493827160495) internal successors, (1841), 648 states have internal predecessors, (1841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:42,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 1841 transitions. [2021-06-05 04:27:42,166 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 1841 transitions. Word has length 17 [2021-06-05 04:27:42,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:27:42,166 INFO L482 AbstractCegarLoop]: Abstraction has 649 states and 1841 transitions. [2021-06-05 04:27:42,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:42,166 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 1841 transitions. [2021-06-05 04:27:42,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:27:42,167 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:27:42,167 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:27:42,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1628,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:42,368 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:27:42,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:27:42,368 INFO L82 PathProgramCache]: Analyzing trace with hash -708639526, now seen corresponding path program 223 times [2021-06-05 04:27:42,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:27:42,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349150876] [2021-06-05 04:27:42,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:27:42,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:27:42,425 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:42,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:27:42,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349150876] [2021-06-05 04:27:42,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349150876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:42,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060383776] [2021-06-05 04:27:42,425 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:42,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:27:42,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:27:42,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:27:42,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:42,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:42,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:42,577 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:42,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:42,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:27:42,580 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:42,602 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:27:42,602 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:27:42,602 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:27:42,602 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:27:42,622 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:42,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060383776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:42,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:27:42,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 04:27:42,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108159905] [2021-06-05 04:27:42,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:27:42,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:27:42,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:27:42,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:27:42,623 INFO L87 Difference]: Start difference. First operand 649 states and 1841 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:42,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:27:42,851 INFO L93 Difference]: Finished difference Result 760 states and 2046 transitions. [2021-06-05 04:27:42,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:27:42,852 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:27:42,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:27:42,853 INFO L225 Difference]: With dead ends: 760 [2021-06-05 04:27:42,853 INFO L226 Difference]: Without dead ends: 760 [2021-06-05 04:27:42,853 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 152.9ms TimeCoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:27:42,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2021-06-05 04:27:42,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 649. [2021-06-05 04:27:42,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 648 states have (on average 2.8410493827160495) internal successors, (1841), 648 states have internal predecessors, (1841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:42,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 1841 transitions. [2021-06-05 04:27:42,859 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 1841 transitions. Word has length 17 [2021-06-05 04:27:42,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:27:42,859 INFO L482 AbstractCegarLoop]: Abstraction has 649 states and 1841 transitions. [2021-06-05 04:27:42,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:42,859 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 1841 transitions. [2021-06-05 04:27:42,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:27:42,860 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:27:42,860 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:27:43,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1632,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:43,065 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:27:43,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:27:43,065 INFO L82 PathProgramCache]: Analyzing trace with hash -561657414, now seen corresponding path program 224 times [2021-06-05 04:27:43,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:27:43,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097120614] [2021-06-05 04:27:43,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:27:43,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:27:43,138 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:27:43,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:27:43,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097120614] [2021-06-05 04:27:43,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097120614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:43,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436175381] [2021-06-05 04:27:43,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:43,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:27:43,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:27:43,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:27:43,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:27:43,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:43,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:43,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:43,263 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:43,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:43,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:43,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:27:43,266 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:43,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:43,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:43,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:43,270 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:43,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:43,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:27:43,273 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:43,306 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:27:43,307 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:27:43,310 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:27:43,310 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:27:43,372 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:43,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436175381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:43,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:27:43,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 04:27:43,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512308770] [2021-06-05 04:27:43,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:27:43,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:27:43,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:27:43,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:27:43,373 INFO L87 Difference]: Start difference. First operand 649 states and 1841 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:43,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:27:43,766 INFO L93 Difference]: Finished difference Result 689 states and 1903 transitions. [2021-06-05 04:27:43,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:27:43,766 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:27:43,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:27:43,767 INFO L225 Difference]: With dead ends: 689 [2021-06-05 04:27:43,767 INFO L226 Difference]: Without dead ends: 685 [2021-06-05 04:27:43,767 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 372.0ms TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:27:43,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2021-06-05 04:27:43,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 647. [2021-06-05 04:27:43,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 646 states have (on average 2.8390092879256965) internal successors, (1834), 646 states have internal predecessors, (1834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:43,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 1834 transitions. [2021-06-05 04:27:43,773 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 1834 transitions. Word has length 17 [2021-06-05 04:27:43,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:27:43,773 INFO L482 AbstractCegarLoop]: Abstraction has 647 states and 1834 transitions. [2021-06-05 04:27:43,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:43,773 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 1834 transitions. [2021-06-05 04:27:43,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:27:43,774 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:27:43,774 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:27:43,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1635 [2021-06-05 04:27:43,974 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:27:43,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:27:43,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1167389920, now seen corresponding path program 225 times [2021-06-05 04:27:43,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:27:43,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809029316] [2021-06-05 04:27:43,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:27:43,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:27:44,037 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:27:44,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:27:44,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809029316] [2021-06-05 04:27:44,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809029316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:44,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761218177] [2021-06-05 04:27:44,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:44,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:27:44,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:27:44,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:27:44,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:27:44,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:44,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:44,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:44,211 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:44,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:27:44,214 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:44,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:27:44,217 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:44,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:27:44,226 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:44,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:44,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:44,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:27:44,230 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:44,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:27:44,233 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:44,263 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-05 04:27:44,263 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:27:44,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:27:44,264 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-05 04:27:44,290 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:44,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761218177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:44,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:27:44,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 04:27:44,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119251591] [2021-06-05 04:27:44,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:27:44,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:27:44,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:27:44,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:27:44,291 INFO L87 Difference]: Start difference. First operand 647 states and 1834 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:44,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:27:44,532 INFO L93 Difference]: Finished difference Result 662 states and 1857 transitions. [2021-06-05 04:27:44,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:27:44,532 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:27:44,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:27:44,533 INFO L225 Difference]: With dead ends: 662 [2021-06-05 04:27:44,533 INFO L226 Difference]: Without dead ends: 654 [2021-06-05 04:27:44,533 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 285.9ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:27:44,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2021-06-05 04:27:44,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 645. [2021-06-05 04:27:44,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 644 states have (on average 2.8338509316770186) internal successors, (1825), 644 states have internal predecessors, (1825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:44,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1825 transitions. [2021-06-05 04:27:44,539 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1825 transitions. Word has length 17 [2021-06-05 04:27:44,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:27:44,540 INFO L482 AbstractCegarLoop]: Abstraction has 645 states and 1825 transitions. [2021-06-05 04:27:44,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:44,540 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1825 transitions. [2021-06-05 04:27:44,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:27:44,540 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:27:44,540 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:27:44,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1641 [2021-06-05 04:27:44,741 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:27:44,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:27:44,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1096093220, now seen corresponding path program 226 times [2021-06-05 04:27:44,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:27:44,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969845613] [2021-06-05 04:27:44,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:27:44,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:27:44,822 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:44,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:27:44,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969845613] [2021-06-05 04:27:44,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969845613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:44,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711949209] [2021-06-05 04:27:44,823 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:44,849 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:27:44,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:27:44,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:27:44,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:27:44,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:44,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:44,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:44,963 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:44,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:44,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:44,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:27:44,966 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:44,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:44,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:44,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:44,970 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:44,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:44,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:27:44,973 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:45,006 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:27:45,006 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:27:45,007 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:27:45,007 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:27:45,058 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:45,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711949209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:45,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:27:45,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 04:27:45,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462775672] [2021-06-05 04:27:45,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:27:45,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:27:45,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:27:45,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:27:45,059 INFO L87 Difference]: Start difference. First operand 645 states and 1825 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:45,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:27:45,437 INFO L93 Difference]: Finished difference Result 828 states and 2196 transitions. [2021-06-05 04:27:45,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:27:45,438 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:27:45,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:27:45,438 INFO L225 Difference]: With dead ends: 828 [2021-06-05 04:27:45,438 INFO L226 Difference]: Without dead ends: 827 [2021-06-05 04:27:45,439 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 322.3ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:27:45,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2021-06-05 04:27:45,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 694. [2021-06-05 04:27:45,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 693 states have (on average 2.8715728715728717) internal successors, (1990), 693 states have internal predecessors, (1990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:45,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 1990 transitions. [2021-06-05 04:27:45,446 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 1990 transitions. Word has length 17 [2021-06-05 04:27:45,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:27:45,446 INFO L482 AbstractCegarLoop]: Abstraction has 694 states and 1990 transitions. [2021-06-05 04:27:45,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:45,446 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 1990 transitions. [2021-06-05 04:27:45,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:27:45,446 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:27:45,446 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:27:45,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1648 [2021-06-05 04:27:45,647 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:27:45,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:27:45,647 INFO L82 PathProgramCache]: Analyzing trace with hash -294476992, now seen corresponding path program 227 times [2021-06-05 04:27:45,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:27:45,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534825048] [2021-06-05 04:27:45,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:27:45,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:27:45,728 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:45,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:27:45,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534825048] [2021-06-05 04:27:45,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534825048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:45,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015258155] [2021-06-05 04:27:45,729 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:45,756 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:27:45,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:27:45,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:27:45,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:27:45,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:45,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:45,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:45,871 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:45,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:45,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:45,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:27:45,874 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:45,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:45,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:45,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:45,878 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:45,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:45,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:27:45,881 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:45,915 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:27:45,915 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:27:45,916 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:27:45,916 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:27:45,986 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:45,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015258155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:45,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:27:45,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 04:27:45,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82709709] [2021-06-05 04:27:45,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:27:45,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:27:45,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:27:45,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:27:45,987 INFO L87 Difference]: Start difference. First operand 694 states and 1990 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:46,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:27:46,622 INFO L93 Difference]: Finished difference Result 821 states and 2194 transitions. [2021-06-05 04:27:46,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 04:27:46,622 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:27:46,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:27:46,623 INFO L225 Difference]: With dead ends: 821 [2021-06-05 04:27:46,623 INFO L226 Difference]: Without dead ends: 813 [2021-06-05 04:27:46,623 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 591.4ms TimeCoverageRelationStatistics Valid=144, Invalid=978, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 04:27:46,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 813 states. [2021-06-05 04:27:46,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 813 to 705. [2021-06-05 04:27:46,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 2.875) internal successors, (2024), 704 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:46,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 2024 transitions. [2021-06-05 04:27:46,630 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 2024 transitions. Word has length 17 [2021-06-05 04:27:46,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:27:46,630 INFO L482 AbstractCegarLoop]: Abstraction has 705 states and 2024 transitions. [2021-06-05 04:27:46,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:46,630 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 2024 transitions. [2021-06-05 04:27:46,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:27:46,631 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:27:46,631 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:27:46,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1652 [2021-06-05 04:27:46,832 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:27:46,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:27:46,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1423866714, now seen corresponding path program 228 times [2021-06-05 04:27:46,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:27:46,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564329299] [2021-06-05 04:27:46,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:27:46,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:27:46,914 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:46,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:27:46,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564329299] [2021-06-05 04:27:46,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564329299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:46,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920507222] [2021-06-05 04:27:46,915 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:46,949 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:27:46,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:27:46,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:27:46,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:27:47,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:47,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:47,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:47,066 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:47,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:47,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:47,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:27:47,069 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:47,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:47,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:47,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:47,073 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:47,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:47,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:27:47,076 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:47,109 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:27:47,110 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:27:47,110 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:27:47,110 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:27:47,160 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:47,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920507222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:47,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:27:47,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 04:27:47,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184532370] [2021-06-05 04:27:47,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:27:47,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:27:47,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:27:47,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:27:47,160 INFO L87 Difference]: Start difference. First operand 705 states and 2024 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:47,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:27:47,547 INFO L93 Difference]: Finished difference Result 803 states and 2170 transitions. [2021-06-05 04:27:47,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:27:47,547 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:27:47,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:27:47,548 INFO L225 Difference]: With dead ends: 803 [2021-06-05 04:27:47,548 INFO L226 Difference]: Without dead ends: 803 [2021-06-05 04:27:47,548 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 388.3ms TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:27:47,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2021-06-05 04:27:47,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 697. [2021-06-05 04:27:47,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 696 states have (on average 2.8620689655172415) internal successors, (1992), 696 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:47,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1992 transitions. [2021-06-05 04:27:47,555 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1992 transitions. Word has length 17 [2021-06-05 04:27:47,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:27:47,555 INFO L482 AbstractCegarLoop]: Abstraction has 697 states and 1992 transitions. [2021-06-05 04:27:47,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:47,555 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1992 transitions. [2021-06-05 04:27:47,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:27:47,556 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:27:47,556 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:27:47,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1657 [2021-06-05 04:27:47,757 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:27:47,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:27:47,757 INFO L82 PathProgramCache]: Analyzing trace with hash -286746594, now seen corresponding path program 229 times [2021-06-05 04:27:47,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:27:47,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342348073] [2021-06-05 04:27:47,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:27:47,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:27:47,833 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:47,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:27:47,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342348073] [2021-06-05 04:27:47,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342348073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:47,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617780760] [2021-06-05 04:27:47,833 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:47,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:27:47,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:27:47,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:27:48,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:48,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:48,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:48,007 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:48,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:48,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:27:48,014 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:48,036 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:27:48,036 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:27:48,037 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:27:48,037 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:27:48,058 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:48,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617780760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:48,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:27:48,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 04:27:48,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488109156] [2021-06-05 04:27:48,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:27:48,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:27:48,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:27:48,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:27:48,059 INFO L87 Difference]: Start difference. First operand 697 states and 1992 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:48,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:27:48,585 INFO L93 Difference]: Finished difference Result 840 states and 2242 transitions. [2021-06-05 04:27:48,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:27:48,586 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:27:48,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:27:48,587 INFO L225 Difference]: With dead ends: 840 [2021-06-05 04:27:48,587 INFO L226 Difference]: Without dead ends: 840 [2021-06-05 04:27:48,588 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 424.2ms TimeCoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:27:48,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2021-06-05 04:27:48,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 689. [2021-06-05 04:27:48,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 688 states have (on average 2.854651162790698) internal successors, (1964), 688 states have internal predecessors, (1964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:48,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 1964 transitions. [2021-06-05 04:27:48,595 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 1964 transitions. Word has length 17 [2021-06-05 04:27:48,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:27:48,595 INFO L482 AbstractCegarLoop]: Abstraction has 689 states and 1964 transitions. [2021-06-05 04:27:48,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:48,595 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 1964 transitions. [2021-06-05 04:27:48,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:27:48,596 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:27:48,596 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:27:48,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1661 [2021-06-05 04:27:48,796 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:27:48,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:27:48,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1776151590, now seen corresponding path program 230 times [2021-06-05 04:27:48,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:27:48,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453357173] [2021-06-05 04:27:48,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:27:48,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:27:48,866 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:48,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:27:48,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453357173] [2021-06-05 04:27:48,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453357173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:48,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605792574] [2021-06-05 04:27:48,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:48,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:27:48,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:27:48,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:27:48,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:27:49,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:49,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:49,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:49,085 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:49,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:49,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:27:49,089 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:49,119 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:27:49,120 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:27:49,121 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:27:49,121 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:27:49,149 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:49,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605792574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:49,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:27:49,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 04:27:49,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130861816] [2021-06-05 04:27:49,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:27:49,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:27:49,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:27:49,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:27:49,150 INFO L87 Difference]: Start difference. First operand 689 states and 1964 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:49,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:27:49,451 INFO L93 Difference]: Finished difference Result 790 states and 2131 transitions. [2021-06-05 04:27:49,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:27:49,451 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:27:49,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:27:49,452 INFO L225 Difference]: With dead ends: 790 [2021-06-05 04:27:49,452 INFO L226 Difference]: Without dead ends: 790 [2021-06-05 04:27:49,452 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 205.9ms TimeCoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:27:49,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2021-06-05 04:27:49,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 690. [2021-06-05 04:27:49,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 690 states, 689 states have (on average 2.856313497822932) internal successors, (1968), 689 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:49,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 1968 transitions. [2021-06-05 04:27:49,459 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 1968 transitions. Word has length 17 [2021-06-05 04:27:49,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:27:49,459 INFO L482 AbstractCegarLoop]: Abstraction has 690 states and 1968 transitions. [2021-06-05 04:27:49,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:49,459 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 1968 transitions. [2021-06-05 04:27:49,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:27:49,460 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:27:49,460 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:27:49,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1664 [2021-06-05 04:27:49,660 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:27:49,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:27:49,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1799298558, now seen corresponding path program 231 times [2021-06-05 04:27:49,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:27:49,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610795166] [2021-06-05 04:27:49,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:27:49,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:27:49,737 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:27:49,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:27:49,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610795166] [2021-06-05 04:27:49,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610795166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:49,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383104568] [2021-06-05 04:27:49,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:49,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:27:49,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:27:49,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:27:49,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:27:49,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:49,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:49,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:49,877 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:49,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:49,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:49,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:27:49,880 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:49,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:49,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:49,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:49,884 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:49,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:49,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:27:49,887 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:49,920 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:27:49,920 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:27:49,920 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:27:49,920 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:27:49,982 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:49,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383104568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:49,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:27:49,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 04:27:49,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019928661] [2021-06-05 04:27:49,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:27:49,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:27:49,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:27:49,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:27:49,983 INFO L87 Difference]: Start difference. First operand 690 states and 1968 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:50,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:27:50,306 INFO L93 Difference]: Finished difference Result 733 states and 2033 transitions. [2021-06-05 04:27:50,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:27:50,306 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:27:50,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:27:50,307 INFO L225 Difference]: With dead ends: 733 [2021-06-05 04:27:50,307 INFO L226 Difference]: Without dead ends: 729 [2021-06-05 04:27:50,307 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 355.6ms TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:27:50,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2021-06-05 04:27:50,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 687. [2021-06-05 04:27:50,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 686 states have (on average 2.8542274052478134) internal successors, (1958), 686 states have internal predecessors, (1958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:50,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 1958 transitions. [2021-06-05 04:27:50,313 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 1958 transitions. Word has length 17 [2021-06-05 04:27:50,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:27:50,313 INFO L482 AbstractCegarLoop]: Abstraction has 687 states and 1958 transitions. [2021-06-05 04:27:50,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:50,313 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 1958 transitions. [2021-06-05 04:27:50,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:27:50,314 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:27:50,314 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:27:50,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1667,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:50,515 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:27:50,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:27:50,515 INFO L82 PathProgramCache]: Analyzing trace with hash -766621404, now seen corresponding path program 232 times [2021-06-05 04:27:50,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:27:50,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295408301] [2021-06-05 04:27:50,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:27:50,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:27:50,594 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:27:50,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:27:50,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295408301] [2021-06-05 04:27:50,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295408301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:50,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395221486] [2021-06-05 04:27:50,595 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:50,622 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:27:50,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:27:50,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:27:50,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:27:50,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:50,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:50,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:50,787 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:50,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:27:50,790 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:50,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:27:50,793 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:50,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:27:50,796 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:50,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:50,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:50,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:27:50,800 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:50,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:27:50,803 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:50,833 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-05 04:27:50,833 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:27:50,834 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:27:50,834 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-05 04:27:50,860 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:50,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395221486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:50,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:27:50,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 04:27:50,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251921279] [2021-06-05 04:27:50,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:27:50,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:27:50,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:27:50,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:27:50,861 INFO L87 Difference]: Start difference. First operand 687 states and 1958 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:51,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:27:51,179 INFO L93 Difference]: Finished difference Result 733 states and 2026 transitions. [2021-06-05 04:27:51,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:27:51,179 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:27:51,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:27:51,180 INFO L225 Difference]: With dead ends: 733 [2021-06-05 04:27:51,180 INFO L226 Difference]: Without dead ends: 725 [2021-06-05 04:27:51,180 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 348.1ms TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:27:51,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2021-06-05 04:27:51,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 685. [2021-06-05 04:27:51,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 684 states have (on average 2.8523391812865495) internal successors, (1951), 684 states have internal predecessors, (1951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:51,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 1951 transitions. [2021-06-05 04:27:51,186 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 1951 transitions. Word has length 17 [2021-06-05 04:27:51,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:27:51,186 INFO L482 AbstractCegarLoop]: Abstraction has 685 states and 1951 transitions. [2021-06-05 04:27:51,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:51,186 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 1951 transitions. [2021-06-05 04:27:51,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:27:51,187 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:27:51,187 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:27:51,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1673 [2021-06-05 04:27:51,388 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:27:51,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:27:51,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1294238398, now seen corresponding path program 233 times [2021-06-05 04:27:51,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:27:51,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855482020] [2021-06-05 04:27:51,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:27:51,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:27:51,457 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:27:51,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:27:51,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855482020] [2021-06-05 04:27:51,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855482020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:51,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254538078] [2021-06-05 04:27:51,457 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:51,485 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:27:51,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:27:51,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:27:51,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:27:51,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:51,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:51,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:51,656 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:51,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:27:51,659 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:51,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:27:51,662 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:51,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:27:51,665 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:51,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:51,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:51,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:27:51,669 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:51,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:27:51,672 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:51,702 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-05 04:27:51,702 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:27:51,703 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:27:51,703 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-05 04:27:51,730 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:51,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254538078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:51,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:27:51,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 04:27:51,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144817147] [2021-06-05 04:27:51,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:27:51,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:27:51,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:27:51,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:27:51,731 INFO L87 Difference]: Start difference. First operand 685 states and 1951 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:52,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:27:52,015 INFO L93 Difference]: Finished difference Result 718 states and 1996 transitions. [2021-06-05 04:27:52,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:27:52,015 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:27:52,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:27:52,016 INFO L225 Difference]: With dead ends: 718 [2021-06-05 04:27:52,016 INFO L226 Difference]: Without dead ends: 706 [2021-06-05 04:27:52,016 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 349.5ms TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:27:52,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2021-06-05 04:27:52,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 684. [2021-06-05 04:27:52,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 2.8506588579795022) internal successors, (1947), 683 states have internal predecessors, (1947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:52,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1947 transitions. [2021-06-05 04:27:52,022 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1947 transitions. Word has length 17 [2021-06-05 04:27:52,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:27:52,022 INFO L482 AbstractCegarLoop]: Abstraction has 684 states and 1947 transitions. [2021-06-05 04:27:52,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:52,022 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1947 transitions. [2021-06-05 04:27:52,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:27:52,023 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:27:52,023 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:27:52,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1680,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:52,224 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:27:52,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:27:52,224 INFO L82 PathProgramCache]: Analyzing trace with hash -902314216, now seen corresponding path program 234 times [2021-06-05 04:27:52,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:27:52,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80002638] [2021-06-05 04:27:52,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:27:52,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:27:52,333 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:52,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:27:52,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80002638] [2021-06-05 04:27:52,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80002638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:52,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463913999] [2021-06-05 04:27:52,333 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:52,360 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:27:52,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:27:52,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:27:52,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:27:52,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:52,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:52,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:52,491 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:52,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:52,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:52,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:27:52,495 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:52,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:52,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:52,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:52,498 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:52,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:52,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:27:52,501 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:52,535 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:27:52,535 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:27:52,536 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:27:52,536 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:27:52,590 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:52,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463913999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:52,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:27:52,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:27:52,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563633780] [2021-06-05 04:27:52,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:27:52,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:27:52,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:27:52,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:27:52,591 INFO L87 Difference]: Start difference. First operand 684 states and 1947 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:52,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:27:52,988 INFO L93 Difference]: Finished difference Result 854 states and 2269 transitions. [2021-06-05 04:27:52,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:27:52,988 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:27:52,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:27:52,989 INFO L225 Difference]: With dead ends: 854 [2021-06-05 04:27:52,989 INFO L226 Difference]: Without dead ends: 854 [2021-06-05 04:27:52,989 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 413.6ms TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:27:52,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 854 states. [2021-06-05 04:27:52,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 854 to 711. [2021-06-05 04:27:52,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 710 states have (on average 2.876056338028169) internal successors, (2042), 710 states have internal predecessors, (2042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:52,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 2042 transitions. [2021-06-05 04:27:52,996 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 2042 transitions. Word has length 17 [2021-06-05 04:27:52,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:27:52,996 INFO L482 AbstractCegarLoop]: Abstraction has 711 states and 2042 transitions. [2021-06-05 04:27:52,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:52,996 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 2042 transitions. [2021-06-05 04:27:52,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:27:52,997 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:27:52,997 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:27:53,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1687 [2021-06-05 04:27:53,198 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:27:53,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:27:53,198 INFO L82 PathProgramCache]: Analyzing trace with hash -100697988, now seen corresponding path program 235 times [2021-06-05 04:27:53,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:27:53,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918187162] [2021-06-05 04:27:53,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:27:53,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:27:53,292 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:53,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:27:53,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918187162] [2021-06-05 04:27:53,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918187162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:53,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111111083] [2021-06-05 04:27:53,293 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:53,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:27:53,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:27:53,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:27:53,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:53,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:53,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:53,452 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:53,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:53,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:53,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:27:53,456 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:53,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:53,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:53,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:53,459 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:53,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:53,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:27:53,462 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:53,496 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:27:53,497 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:27:53,497 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:27:53,497 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:27:53,570 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:53,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111111083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:53,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:27:53,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:27:53,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923040154] [2021-06-05 04:27:53,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:27:53,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:27:53,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:27:53,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:27:53,571 INFO L87 Difference]: Start difference. First operand 711 states and 2042 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:54,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:27:54,555 INFO L93 Difference]: Finished difference Result 893 states and 2372 transitions. [2021-06-05 04:27:54,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 04:27:54,556 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:27:54,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:27:54,557 INFO L225 Difference]: With dead ends: 893 [2021-06-05 04:27:54,557 INFO L226 Difference]: Without dead ends: 882 [2021-06-05 04:27:54,557 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 935.3ms TimeCoverageRelationStatistics Valid=216, Invalid=1590, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 04:27:54,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2021-06-05 04:27:54,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 733. [2021-06-05 04:27:54,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733 states, 732 states have (on average 2.8948087431693987) internal successors, (2119), 732 states have internal predecessors, (2119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:54,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 2119 transitions. [2021-06-05 04:27:54,564 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 2119 transitions. Word has length 17 [2021-06-05 04:27:54,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:27:54,565 INFO L482 AbstractCegarLoop]: Abstraction has 733 states and 2119 transitions. [2021-06-05 04:27:54,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:54,565 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 2119 transitions. [2021-06-05 04:27:54,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:27:54,565 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:27:54,565 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:27:54,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1691,240 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:54,766 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:27:54,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:27:54,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1617645718, now seen corresponding path program 236 times [2021-06-05 04:27:54,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:27:54,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123752239] [2021-06-05 04:27:54,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:27:54,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:27:54,880 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:54,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:27:54,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123752239] [2021-06-05 04:27:54,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123752239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:54,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297711167] [2021-06-05 04:27:54,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:54,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:27:54,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:27:54,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:27:54,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:27:55,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:55,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:55,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:55,088 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:55,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:55,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:55,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:27:55,092 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:55,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:55,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:55,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:55,097 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:55,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:55,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:27:55,101 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:55,140 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:27:55,141 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:27:55,141 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:27:55,141 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:27:55,201 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:55,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297711167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:55,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:27:55,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:27:55,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176862981] [2021-06-05 04:27:55,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:27:55,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:27:55,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:27:55,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:27:55,202 INFO L87 Difference]: Start difference. First operand 733 states and 2119 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:55,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:27:55,769 INFO L93 Difference]: Finished difference Result 885 states and 2372 transitions. [2021-06-05 04:27:55,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:27:55,769 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:27:55,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:27:55,770 INFO L225 Difference]: With dead ends: 885 [2021-06-05 04:27:55,770 INFO L226 Difference]: Without dead ends: 885 [2021-06-05 04:27:55,771 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 606.9ms TimeCoverageRelationStatistics Valid=146, Invalid=846, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:27:55,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 885 states. [2021-06-05 04:27:55,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 885 to 743. [2021-06-05 04:27:55,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 742 states have (on average 2.881401617250674) internal successors, (2138), 742 states have internal predecessors, (2138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:55,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 2138 transitions. [2021-06-05 04:27:55,778 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 2138 transitions. Word has length 17 [2021-06-05 04:27:55,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:27:55,778 INFO L482 AbstractCegarLoop]: Abstraction has 743 states and 2138 transitions. [2021-06-05 04:27:55,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:55,778 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 2138 transitions. [2021-06-05 04:27:55,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:27:55,779 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:27:55,779 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:27:55,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1696 [2021-06-05 04:27:55,981 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:27:55,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:27:55,981 INFO L82 PathProgramCache]: Analyzing trace with hash -92967590, now seen corresponding path program 237 times [2021-06-05 04:27:55,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:27:55,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872607841] [2021-06-05 04:27:55,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:27:55,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:27:56,069 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:56,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:27:56,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872607841] [2021-06-05 04:27:56,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872607841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:56,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78300009] [2021-06-05 04:27:56,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:56,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:27:56,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:27:56,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:27:56,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:27:56,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:56,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:56,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:56,263 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:56,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:56,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:27:56,266 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:56,288 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:27:56,288 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:27:56,289 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:27:56,289 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:27:56,311 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:56,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78300009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:56,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:27:56,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:27:56,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500156955] [2021-06-05 04:27:56,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:27:56,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:27:56,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:27:56,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:27:56,312 INFO L87 Difference]: Start difference. First operand 743 states and 2138 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:57,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:27:57,147 INFO L93 Difference]: Finished difference Result 925 states and 2443 transitions. [2021-06-05 04:27:57,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 04:27:57,147 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:27:57,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:27:57,148 INFO L225 Difference]: With dead ends: 925 [2021-06-05 04:27:57,148 INFO L226 Difference]: Without dead ends: 925 [2021-06-05 04:27:57,148 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 705.5ms TimeCoverageRelationStatistics Valid=185, Invalid=1375, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 04:27:57,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2021-06-05 04:27:57,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 740. [2021-06-05 04:27:57,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 2.8687415426251692) internal successors, (2120), 739 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:57,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 2120 transitions. [2021-06-05 04:27:57,156 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 2120 transitions. Word has length 17 [2021-06-05 04:27:57,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:27:57,156 INFO L482 AbstractCegarLoop]: Abstraction has 740 states and 2120 transitions. [2021-06-05 04:27:57,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:57,156 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 2120 transitions. [2021-06-05 04:27:57,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:27:57,157 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:27:57,157 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:27:57,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1700,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:57,358 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:27:57,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:27:57,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1582372586, now seen corresponding path program 238 times [2021-06-05 04:27:57,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:27:57,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811179279] [2021-06-05 04:27:57,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:27:57,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:27:57,444 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:57,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:27:57,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811179279] [2021-06-05 04:27:57,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811179279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:57,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380607741] [2021-06-05 04:27:57,444 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:57,471 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:27:57,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:27:57,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:27:57,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:27:57,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:57,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:57,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:27:57,625 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:57,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:57,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:57,628 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:57,650 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:27:57,651 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:27:57,651 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:27:57,651 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:27:57,673 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:57,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380607741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:57,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:27:57,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:27:57,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636975798] [2021-06-05 04:27:57,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:27:57,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:27:57,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:27:57,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:27:57,674 INFO L87 Difference]: Start difference. First operand 740 states and 2120 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:58,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:27:58,736 INFO L93 Difference]: Finished difference Result 999 states and 2576 transitions. [2021-06-05 04:27:58,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 04:27:58,736 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:27:58,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:27:58,738 INFO L225 Difference]: With dead ends: 999 [2021-06-05 04:27:58,738 INFO L226 Difference]: Without dead ends: 999 [2021-06-05 04:27:58,738 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 881.2ms TimeCoverageRelationStatistics Valid=279, Invalid=1977, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 04:27:58,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2021-06-05 04:27:58,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 734. [2021-06-05 04:27:58,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 733 states have (on average 2.8663028649386084) internal successors, (2101), 733 states have internal predecessors, (2101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:58,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 2101 transitions. [2021-06-05 04:27:58,745 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 2101 transitions. Word has length 17 [2021-06-05 04:27:58,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:27:58,745 INFO L482 AbstractCegarLoop]: Abstraction has 734 states and 2101 transitions. [2021-06-05 04:27:58,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:58,745 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 2101 transitions. [2021-06-05 04:27:58,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:27:58,746 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:27:58,746 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:27:58,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1703 [2021-06-05 04:27:58,947 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:27:58,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:27:58,947 INFO L82 PathProgramCache]: Analyzing trace with hash -509287206, now seen corresponding path program 239 times [2021-06-05 04:27:58,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:27:58,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501628287] [2021-06-05 04:27:58,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:27:58,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:27:59,028 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:59,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:27:59,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501628287] [2021-06-05 04:27:59,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501628287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:59,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992417438] [2021-06-05 04:27:59,028 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:59,056 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:27:59,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:27:59,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:27:59,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:27:59,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:59,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:59,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:27:59,207 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:59,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:59,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:59,210 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:59,232 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:27:59,232 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:27:59,232 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:27:59,232 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:27:59,254 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:59,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992417438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:59,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:27:59,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:27:59,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988468328] [2021-06-05 04:27:59,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:27:59,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:27:59,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:27:59,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:27:59,255 INFO L87 Difference]: Start difference. First operand 734 states and 2101 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:59,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:27:59,491 INFO L93 Difference]: Finished difference Result 850 states and 2297 transitions. [2021-06-05 04:27:59,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:27:59,491 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:27:59,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:27:59,493 INFO L225 Difference]: With dead ends: 850 [2021-06-05 04:27:59,493 INFO L226 Difference]: Without dead ends: 850 [2021-06-05 04:27:59,493 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 198.0ms TimeCoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:27:59,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2021-06-05 04:27:59,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 737. [2021-06-05 04:27:59,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 2.8668478260869565) internal successors, (2110), 736 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:59,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 2110 transitions. [2021-06-05 04:27:59,503 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 2110 transitions. Word has length 17 [2021-06-05 04:27:59,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:27:59,503 INFO L482 AbstractCegarLoop]: Abstraction has 737 states and 2110 transitions. [2021-06-05 04:27:59,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:27:59,503 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 2110 transitions. [2021-06-05 04:27:59,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:27:59,504 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:27:59,504 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:27:59,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1706,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:59,704 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:27:59,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:27:59,705 INFO L82 PathProgramCache]: Analyzing trace with hash 879028154, now seen corresponding path program 240 times [2021-06-05 04:27:59,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:27:59,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510877555] [2021-06-05 04:27:59,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:27:59,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:27:59,791 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:59,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:27:59,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510877555] [2021-06-05 04:27:59,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510877555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:59,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865276232] [2021-06-05 04:27:59,792 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:27:59,819 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:27:59,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:27:59,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:27:59,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:27:59,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:27:59,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:27:59,916 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:59,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:27:59,918 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:27:59,933 INFO L628 ElimStorePlain]: treesize reduction 27, result has 30.8 percent of original size [2021-06-05 04:27:59,933 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:27:59,934 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:27:59,934 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:12 [2021-06-05 04:27:59,954 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:27:59,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865276232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:27:59,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:27:59,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:27:59,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445815551] [2021-06-05 04:27:59,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:27:59,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:27:59,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:27:59,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:27:59,954 INFO L87 Difference]: Start difference. First operand 737 states and 2110 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:00,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:28:00,118 INFO L93 Difference]: Finished difference Result 1005 states and 2818 transitions. [2021-06-05 04:28:00,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:28:00,119 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:28:00,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:28:00,120 INFO L225 Difference]: With dead ends: 1005 [2021-06-05 04:28:00,120 INFO L226 Difference]: Without dead ends: 1005 [2021-06-05 04:28:00,120 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 187.0ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:28:00,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2021-06-05 04:28:00,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 736. [2021-06-05 04:28:00,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 735 states have (on average 2.869387755102041) internal successors, (2109), 735 states have internal predecessors, (2109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:00,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 2109 transitions. [2021-06-05 04:28:00,127 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 2109 transitions. Word has length 17 [2021-06-05 04:28:00,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:28:00,127 INFO L482 AbstractCegarLoop]: Abstraction has 736 states and 2109 transitions. [2021-06-05 04:28:00,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:00,128 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 2109 transitions. [2021-06-05 04:28:00,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:28:00,128 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:28:00,128 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:28:00,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1709 [2021-06-05 04:28:00,329 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:28:00,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:28:00,329 INFO L82 PathProgramCache]: Analyzing trace with hash 744702690, now seen corresponding path program 241 times [2021-06-05 04:28:00,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:28:00,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591517507] [2021-06-05 04:28:00,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:28:00,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:28:00,412 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:00,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:28:00,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591517507] [2021-06-05 04:28:00,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591517507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:00,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313969164] [2021-06-05 04:28:00,412 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:00,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:28:00,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:28:00,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:28:00,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:28:00,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:00,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:00,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:28:00,550 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:00,552 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:28:00,552 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:00,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:28:00,555 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:00,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:28:00,558 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:00,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:00,561 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:00,583 INFO L628 ElimStorePlain]: treesize reduction 26, result has 43.5 percent of original size [2021-06-05 04:28:00,584 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:28:00,584 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:28:00,584 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:107, output treesize:20 [2021-06-05 04:28:00,611 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:00,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313969164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:00,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:28:00,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 04:28:00,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992009065] [2021-06-05 04:28:00,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:28:00,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:28:00,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:28:00,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:28:00,612 INFO L87 Difference]: Start difference. First operand 736 states and 2109 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:00,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:28:00,976 INFO L93 Difference]: Finished difference Result 1001 states and 2805 transitions. [2021-06-05 04:28:00,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:28:00,976 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:28:00,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:28:00,977 INFO L225 Difference]: With dead ends: 1001 [2021-06-05 04:28:00,977 INFO L226 Difference]: Without dead ends: 996 [2021-06-05 04:28:00,977 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 381.3ms TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:28:00,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2021-06-05 04:28:00,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 736. [2021-06-05 04:28:00,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 735 states have (on average 2.8680272108843536) internal successors, (2108), 735 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:00,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 2108 transitions. [2021-06-05 04:28:00,985 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 2108 transitions. Word has length 17 [2021-06-05 04:28:00,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:28:00,985 INFO L482 AbstractCegarLoop]: Abstraction has 736 states and 2108 transitions. [2021-06-05 04:28:00,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:00,985 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 2108 transitions. [2021-06-05 04:28:00,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:28:00,986 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:28:00,986 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:28:01,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1711,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:01,190 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:28:01,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:28:01,191 INFO L82 PathProgramCache]: Analyzing trace with hash -773925220, now seen corresponding path program 242 times [2021-06-05 04:28:01,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:28:01,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278227308] [2021-06-05 04:28:01,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:28:01,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:28:01,300 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:01,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:28:01,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278227308] [2021-06-05 04:28:01,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278227308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:01,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903345573] [2021-06-05 04:28:01,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:01,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:28:01,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:28:01,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:28:01,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:28:01,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:01,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:01,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:01,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:01,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:01,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:28:01,468 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:01,491 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:28:01,491 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:28:01,491 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:28:01,491 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:28:01,512 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:01,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903345573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:01,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:28:01,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:28:01,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556958034] [2021-06-05 04:28:01,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:28:01,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:28:01,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:28:01,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:28:01,513 INFO L87 Difference]: Start difference. First operand 736 states and 2108 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:01,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:28:01,714 INFO L93 Difference]: Finished difference Result 1006 states and 2820 transitions. [2021-06-05 04:28:01,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:28:01,715 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:28:01,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:28:01,716 INFO L225 Difference]: With dead ends: 1006 [2021-06-05 04:28:01,716 INFO L226 Difference]: Without dead ends: 1006 [2021-06-05 04:28:01,716 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 188.2ms TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:28:01,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2021-06-05 04:28:01,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 737. [2021-06-05 04:28:01,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 2.8682065217391304) internal successors, (2111), 736 states have internal predecessors, (2111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:01,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 2111 transitions. [2021-06-05 04:28:01,726 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 2111 transitions. Word has length 17 [2021-06-05 04:28:01,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:28:01,726 INFO L482 AbstractCegarLoop]: Abstraction has 737 states and 2111 transitions. [2021-06-05 04:28:01,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:01,726 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 2111 transitions. [2021-06-05 04:28:01,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:28:01,727 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:28:01,727 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:28:01,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1718,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:01,929 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:28:01,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:28:01,929 INFO L82 PathProgramCache]: Analyzing trace with hash 156957368, now seen corresponding path program 243 times [2021-06-05 04:28:01,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:28:01,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838814650] [2021-06-05 04:28:01,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:28:01,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:28:02,013 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:02,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:28:02,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838814650] [2021-06-05 04:28:02,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838814650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:02,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554153321] [2021-06-05 04:28:02,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:02,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:28:02,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:28:02,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:28:02,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:28:02,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:02,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:02,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:02,214 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:02,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:28:02,217 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:02,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:28:02,220 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:02,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:28:02,223 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:02,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:02,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:02,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:28:02,227 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:02,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:28:02,230 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:02,260 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-05 04:28:02,261 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:28:02,262 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:28:02,262 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-05 04:28:02,290 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:02,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554153321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:02,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:28:02,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:28:02,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216606357] [2021-06-05 04:28:02,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:28:02,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:28:02,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:28:02,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:28:02,291 INFO L87 Difference]: Start difference. First operand 737 states and 2111 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:02,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:28:02,737 INFO L93 Difference]: Finished difference Result 1003 states and 2809 transitions. [2021-06-05 04:28:02,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:28:02,737 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:28:02,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:28:02,738 INFO L225 Difference]: With dead ends: 1003 [2021-06-05 04:28:02,738 INFO L226 Difference]: Without dead ends: 999 [2021-06-05 04:28:02,738 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 481.3ms TimeCoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:28:02,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2021-06-05 04:28:02,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 737. [2021-06-05 04:28:02,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 2.8668478260869565) internal successors, (2110), 736 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:02,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 2110 transitions. [2021-06-05 04:28:02,746 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 2110 transitions. Word has length 17 [2021-06-05 04:28:02,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:28:02,746 INFO L482 AbstractCegarLoop]: Abstraction has 737 states and 2110 transitions. [2021-06-05 04:28:02,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:02,746 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 2110 transitions. [2021-06-05 04:28:02,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:28:02,747 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:28:02,747 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:28:02,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1721,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:02,947 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:28:02,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:28:02,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1934947334, now seen corresponding path program 244 times [2021-06-05 04:28:02,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:28:02,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304721254] [2021-06-05 04:28:02,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:28:02,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:28:03,029 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:03,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:28:03,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304721254] [2021-06-05 04:28:03,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304721254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:03,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711025157] [2021-06-05 04:28:03,029 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:03,057 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:28:03,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:28:03,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:28:03,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:28:03,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:03,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:03,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:28:03,202 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:03,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:03,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:03,205 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:03,227 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:28:03,227 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:28:03,228 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:28:03,228 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:28:03,249 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:03,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711025157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:03,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:28:03,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:28:03,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869893631] [2021-06-05 04:28:03,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:28:03,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:28:03,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:28:03,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:28:03,250 INFO L87 Difference]: Start difference. First operand 737 states and 2110 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:03,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:28:03,760 INFO L93 Difference]: Finished difference Result 1031 states and 2870 transitions. [2021-06-05 04:28:03,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:28:03,761 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:28:03,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:28:03,762 INFO L225 Difference]: With dead ends: 1031 [2021-06-05 04:28:03,762 INFO L226 Difference]: Without dead ends: 1031 [2021-06-05 04:28:03,762 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 467.7ms TimeCoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:28:03,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1031 states. [2021-06-05 04:28:03,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1031 to 740. [2021-06-05 04:28:03,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 2.8673883626522327) internal successors, (2119), 739 states have internal predecessors, (2119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:03,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 2119 transitions. [2021-06-05 04:28:03,770 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 2119 transitions. Word has length 17 [2021-06-05 04:28:03,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:28:03,770 INFO L482 AbstractCegarLoop]: Abstraction has 740 states and 2119 transitions. [2021-06-05 04:28:03,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:03,770 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 2119 transitions. [2021-06-05 04:28:03,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:28:03,771 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:28:03,771 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:28:03,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1728,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:03,971 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:28:03,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:28:03,972 INFO L82 PathProgramCache]: Analyzing trace with hash -380898210, now seen corresponding path program 245 times [2021-06-05 04:28:03,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:28:03,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331444867] [2021-06-05 04:28:03,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:28:03,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:28:04,060 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:04,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:28:04,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331444867] [2021-06-05 04:28:04,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331444867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:04,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226159671] [2021-06-05 04:28:04,061 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:04,089 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:28:04,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:28:04,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:28:04,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:28:04,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:04,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:04,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:04,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:04,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:28:04,255 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:04,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:28:04,258 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:04,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:28:04,261 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:04,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:04,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:04,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:28:04,265 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:04,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:28:04,268 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:04,299 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-05 04:28:04,300 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:28:04,301 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:28:04,301 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-05 04:28:04,329 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:04,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226159671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:04,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:28:04,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:28:04,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237955308] [2021-06-05 04:28:04,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:28:04,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:28:04,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:28:04,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:28:04,330 INFO L87 Difference]: Start difference. First operand 740 states and 2119 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:04,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:28:04,774 INFO L93 Difference]: Finished difference Result 1012 states and 2827 transitions. [2021-06-05 04:28:04,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:28:04,774 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:28:04,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:28:04,775 INFO L225 Difference]: With dead ends: 1012 [2021-06-05 04:28:04,775 INFO L226 Difference]: Without dead ends: 1009 [2021-06-05 04:28:04,775 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 466.1ms TimeCoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:28:04,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2021-06-05 04:28:04,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 742. [2021-06-05 04:28:04,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 741 states have (on average 2.866396761133603) internal successors, (2124), 741 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:04,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 2124 transitions. [2021-06-05 04:28:04,785 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 2124 transitions. Word has length 17 [2021-06-05 04:28:04,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:28:04,786 INFO L482 AbstractCegarLoop]: Abstraction has 742 states and 2124 transitions. [2021-06-05 04:28:04,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:04,786 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 2124 transitions. [2021-06-05 04:28:04,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:28:04,786 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:28:04,786 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:28:04,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1731 [2021-06-05 04:28:04,987 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:28:04,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:28:04,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1695304996, now seen corresponding path program 246 times [2021-06-05 04:28:04,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:28:04,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861159085] [2021-06-05 04:28:04,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:28:04,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:28:05,070 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:05,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:28:05,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861159085] [2021-06-05 04:28:05,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861159085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:05,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690909497] [2021-06-05 04:28:05,070 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:05,098 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:28:05,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:28:05,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:28:05,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:28:05,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:05,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:05,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:05,240 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:05,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:05,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:28:05,243 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:05,266 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:28:05,266 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:28:05,267 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:28:05,267 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:28:05,287 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:05,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690909497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:05,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:28:05,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:28:05,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273086560] [2021-06-05 04:28:05,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:28:05,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:28:05,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:28:05,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:28:05,288 INFO L87 Difference]: Start difference. First operand 742 states and 2124 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:05,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:28:05,894 INFO L93 Difference]: Finished difference Result 1104 states and 2998 transitions. [2021-06-05 04:28:05,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 04:28:05,894 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:28:05,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:28:05,896 INFO L225 Difference]: With dead ends: 1104 [2021-06-05 04:28:05,896 INFO L226 Difference]: Without dead ends: 1104 [2021-06-05 04:28:05,896 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 503.8ms TimeCoverageRelationStatistics Valid=143, Invalid=913, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:28:05,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1104 states. [2021-06-05 04:28:05,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1104 to 753. [2021-06-05 04:28:05,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 752 states have (on average 2.875) internal successors, (2162), 752 states have internal predecessors, (2162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:05,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 2162 transitions. [2021-06-05 04:28:05,904 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 2162 transitions. Word has length 17 [2021-06-05 04:28:05,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:28:05,904 INFO L482 AbstractCegarLoop]: Abstraction has 753 states and 2162 transitions. [2021-06-05 04:28:05,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:05,904 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 2162 transitions. [2021-06-05 04:28:05,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:28:05,905 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:28:05,905 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:28:06,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1738,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:06,106 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:28:06,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:28:06,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1679961592, now seen corresponding path program 247 times [2021-06-05 04:28:06,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:28:06,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021040309] [2021-06-05 04:28:06,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:28:06,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:28:06,198 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:06,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:28:06,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021040309] [2021-06-05 04:28:06,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021040309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:06,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401835771] [2021-06-05 04:28:06,199 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:06,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:28:06,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:28:06,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:28:06,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:06,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:06,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:06,383 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:06,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:28:06,386 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:06,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:28:06,389 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:06,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:28:06,392 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:06,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:06,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:06,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:28:06,396 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:06,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:28:06,399 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:06,430 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-05 04:28:06,430 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:28:06,431 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:28:06,431 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-05 04:28:06,459 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:06,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401835771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:06,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:28:06,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:28:06,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110519803] [2021-06-05 04:28:06,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:28:06,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:28:06,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:28:06,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:28:06,460 INFO L87 Difference]: Start difference. First operand 753 states and 2162 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:06,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:28:06,914 INFO L93 Difference]: Finished difference Result 1026 states and 2871 transitions. [2021-06-05 04:28:06,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:28:06,914 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:28:06,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:28:06,915 INFO L225 Difference]: With dead ends: 1026 [2021-06-05 04:28:06,915 INFO L226 Difference]: Without dead ends: 1024 [2021-06-05 04:28:06,915 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 443.8ms TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:28:06,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2021-06-05 04:28:06,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 755. [2021-06-05 04:28:06,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 754 states have (on average 2.874005305039788) internal successors, (2167), 754 states have internal predecessors, (2167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:06,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 2167 transitions. [2021-06-05 04:28:06,924 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 2167 transitions. Word has length 17 [2021-06-05 04:28:06,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:28:06,924 INFO L482 AbstractCegarLoop]: Abstraction has 755 states and 2167 transitions. [2021-06-05 04:28:06,924 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:06,924 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 2167 transitions. [2021-06-05 04:28:06,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:28:06,925 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:28:06,925 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:28:07,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1741 [2021-06-05 04:28:07,125 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:28:07,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:28:07,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1687574598, now seen corresponding path program 248 times [2021-06-05 04:28:07,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:28:07,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120443213] [2021-06-05 04:28:07,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:28:07,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:28:07,213 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:07,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:28:07,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120443213] [2021-06-05 04:28:07,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120443213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:07,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456085564] [2021-06-05 04:28:07,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:07,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:28:07,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:28:07,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:28:07,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:28:07,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:07,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:07,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:07,350 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:07,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:07,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:07,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:28:07,354 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:07,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:07,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:07,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:07,357 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:07,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:07,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:28:07,365 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:07,402 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:28:07,403 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:28:07,403 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:28:07,403 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:28:07,453 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:07,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456085564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:07,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:28:07,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:28:07,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700637417] [2021-06-05 04:28:07,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:28:07,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:28:07,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:28:07,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:28:07,454 INFO L87 Difference]: Start difference. First operand 755 states and 2167 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:08,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:28:08,094 INFO L93 Difference]: Finished difference Result 1115 states and 3013 transitions. [2021-06-05 04:28:08,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:28:08,094 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:28:08,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:28:08,095 INFO L225 Difference]: With dead ends: 1115 [2021-06-05 04:28:08,095 INFO L226 Difference]: Without dead ends: 1115 [2021-06-05 04:28:08,095 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 527.0ms TimeCoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:28:08,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1115 states. [2021-06-05 04:28:08,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1115 to 762. [2021-06-05 04:28:08,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 761 states have (on average 2.8804204993429696) internal successors, (2192), 761 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:08,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 2192 transitions. [2021-06-05 04:28:08,104 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 2192 transitions. Word has length 17 [2021-06-05 04:28:08,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:28:08,104 INFO L482 AbstractCegarLoop]: Abstraction has 762 states and 2192 transitions. [2021-06-05 04:28:08,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:08,104 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 2192 transitions. [2021-06-05 04:28:08,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:28:08,105 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:28:08,105 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:28:08,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1748,253 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:08,305 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:28:08,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:28:08,305 INFO L82 PathProgramCache]: Analyzing trace with hash -885958370, now seen corresponding path program 249 times [2021-06-05 04:28:08,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:28:08,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593167250] [2021-06-05 04:28:08,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:28:08,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:28:08,401 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:08,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:28:08,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593167250] [2021-06-05 04:28:08,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593167250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:08,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655467002] [2021-06-05 04:28:08,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:08,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:28:08,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:28:08,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:28:08,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:28:08,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:08,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:08,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:08,542 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:08,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:08,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:08,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:28:08,546 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:08,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:08,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:08,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:08,549 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:08,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:08,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:28:08,552 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:08,587 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:28:08,587 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:28:08,587 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:28:08,587 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:28:08,653 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:08,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655467002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:08,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:28:08,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:28:08,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651482888] [2021-06-05 04:28:08,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:28:08,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:28:08,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:28:08,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:28:08,654 INFO L87 Difference]: Start difference. First operand 762 states and 2192 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:09,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:28:09,318 INFO L93 Difference]: Finished difference Result 1062 states and 2940 transitions. [2021-06-05 04:28:09,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:28:09,318 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:28:09,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:28:09,319 INFO L225 Difference]: With dead ends: 1062 [2021-06-05 04:28:09,320 INFO L226 Difference]: Without dead ends: 1059 [2021-06-05 04:28:09,320 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 660.1ms TimeCoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:28:09,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1059 states. [2021-06-05 04:28:09,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1059 to 764. [2021-06-05 04:28:09,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 2.8807339449541285) internal successors, (2198), 763 states have internal predecessors, (2198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:09,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2198 transitions. [2021-06-05 04:28:09,327 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2198 transitions. Word has length 17 [2021-06-05 04:28:09,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:28:09,328 INFO L482 AbstractCegarLoop]: Abstraction has 764 states and 2198 transitions. [2021-06-05 04:28:09,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:09,328 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2198 transitions. [2021-06-05 04:28:09,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:28:09,328 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:28:09,328 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:28:09,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1752,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:09,529 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:28:09,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:28:09,529 INFO L82 PathProgramCache]: Analyzing trace with hash 832385336, now seen corresponding path program 250 times [2021-06-05 04:28:09,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:28:09,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093712198] [2021-06-05 04:28:09,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:28:09,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:28:09,629 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:09,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:28:09,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093712198] [2021-06-05 04:28:09,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093712198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:09,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795961906] [2021-06-05 04:28:09,629 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:09,658 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:28:09,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:28:09,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:28:09,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:28:09,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:09,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:09,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:09,769 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:09,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:09,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:09,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:28:09,773 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:09,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:09,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:09,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:09,776 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:09,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:09,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:28:09,779 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:09,813 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:28:09,813 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:28:09,814 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:28:09,814 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:28:09,865 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:09,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795961906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:09,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:28:09,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:28:09,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622579681] [2021-06-05 04:28:09,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:28:09,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:28:09,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:28:09,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:28:09,866 INFO L87 Difference]: Start difference. First operand 764 states and 2198 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:10,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:28:10,265 INFO L93 Difference]: Finished difference Result 1051 states and 2924 transitions. [2021-06-05 04:28:10,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:28:10,265 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:28:10,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:28:10,266 INFO L225 Difference]: With dead ends: 1051 [2021-06-05 04:28:10,266 INFO L226 Difference]: Without dead ends: 1051 [2021-06-05 04:28:10,266 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 429.4ms TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:28:10,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2021-06-05 04:28:10,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 762. [2021-06-05 04:28:10,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 761 states have (on average 2.8777923784494086) internal successors, (2190), 761 states have internal predecessors, (2190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:10,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 2190 transitions. [2021-06-05 04:28:10,274 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 2190 transitions. Word has length 17 [2021-06-05 04:28:10,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:28:10,274 INFO L482 AbstractCegarLoop]: Abstraction has 762 states and 2190 transitions. [2021-06-05 04:28:10,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:10,274 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 2190 transitions. [2021-06-05 04:28:10,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:28:10,275 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:28:10,275 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:28:10,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1758,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:10,476 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:28:10,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:28:10,476 INFO L82 PathProgramCache]: Analyzing trace with hash 111873060, now seen corresponding path program 251 times [2021-06-05 04:28:10,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:28:10,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413511698] [2021-06-05 04:28:10,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:28:10,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:28:10,556 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:10,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:28:10,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413511698] [2021-06-05 04:28:10,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413511698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:10,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455078113] [2021-06-05 04:28:10,557 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:10,591 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:28:10,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:28:10,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:28:10,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:28:10,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:10,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:10,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:10,716 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:10,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:10,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:28:10,719 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:10,741 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:28:10,742 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:28:10,742 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:28:10,742 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:28:10,763 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:10,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455078113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:10,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:28:10,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:28:10,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486076155] [2021-06-05 04:28:10,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:28:10,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:28:10,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:28:10,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:28:10,763 INFO L87 Difference]: Start difference. First operand 762 states and 2190 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:10,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:28:10,986 INFO L93 Difference]: Finished difference Result 875 states and 2459 transitions. [2021-06-05 04:28:10,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:28:10,986 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:28:10,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:28:10,987 INFO L225 Difference]: With dead ends: 875 [2021-06-05 04:28:10,987 INFO L226 Difference]: Without dead ends: 875 [2021-06-05 04:28:10,987 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 166.4ms TimeCoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:28:10,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2021-06-05 04:28:10,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 768. [2021-06-05 04:28:10,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 767 states have (on average 2.876140808344198) internal successors, (2206), 767 states have internal predecessors, (2206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:10,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 2206 transitions. [2021-06-05 04:28:10,995 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 2206 transitions. Word has length 17 [2021-06-05 04:28:10,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:28:10,995 INFO L482 AbstractCegarLoop]: Abstraction has 768 states and 2206 transitions. [2021-06-05 04:28:10,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:10,995 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 2206 transitions. [2021-06-05 04:28:10,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:28:10,996 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:28:10,996 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:28:11,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1762,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:11,196 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:28:11,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:28:11,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1042755648, now seen corresponding path program 252 times [2021-06-05 04:28:11,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:28:11,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597691699] [2021-06-05 04:28:11,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:28:11,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:28:11,277 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:11,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:28:11,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597691699] [2021-06-05 04:28:11,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597691699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:11,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041583061] [2021-06-05 04:28:11,277 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:11,306 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:28:11,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:28:11,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:28:11,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:28:11,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:11,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:11,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:11,469 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:11,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:28:11,472 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:11,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:28:11,476 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:11,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:28:11,479 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:11,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:11,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:11,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:28:11,490 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:11,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:28:11,493 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:11,523 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-05 04:28:11,524 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:28:11,525 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:28:11,525 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-05 04:28:11,552 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:11,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041583061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:11,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:28:11,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:28:11,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154896803] [2021-06-05 04:28:11,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:28:11,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:28:11,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:28:11,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:28:11,553 INFO L87 Difference]: Start difference. First operand 768 states and 2206 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:11,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:28:11,860 INFO L93 Difference]: Finished difference Result 866 states and 2433 transitions. [2021-06-05 04:28:11,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:28:11,861 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:28:11,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:28:11,862 INFO L225 Difference]: With dead ends: 866 [2021-06-05 04:28:11,862 INFO L226 Difference]: Without dead ends: 862 [2021-06-05 04:28:11,862 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 332.2ms TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:28:11,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2021-06-05 04:28:11,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 770. [2021-06-05 04:28:11,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 769 states have (on average 2.869960988296489) internal successors, (2207), 769 states have internal predecessors, (2207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:11,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 2207 transitions. [2021-06-05 04:28:11,869 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 2207 transitions. Word has length 17 [2021-06-05 04:28:11,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:28:11,869 INFO L482 AbstractCegarLoop]: Abstraction has 770 states and 2207 transitions. [2021-06-05 04:28:11,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:11,869 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 2207 transitions. [2021-06-05 04:28:11,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:28:11,870 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:28:11,870 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:28:12,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1765 [2021-06-05 04:28:12,071 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:28:12,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:28:12,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1049149054, now seen corresponding path program 253 times [2021-06-05 04:28:12,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:28:12,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990197260] [2021-06-05 04:28:12,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:28:12,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:28:12,154 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:12,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:28:12,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990197260] [2021-06-05 04:28:12,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990197260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:12,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166542626] [2021-06-05 04:28:12,155 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:12,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:28:12,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:28:12,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:28:12,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:12,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:12,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:12,310 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:12,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:12,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:28:12,313 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:12,335 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:28:12,335 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:28:12,336 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:28:12,336 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:28:12,356 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:12,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166542626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:12,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:28:12,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:28:12,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369232717] [2021-06-05 04:28:12,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:28:12,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:28:12,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:28:12,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:28:12,357 INFO L87 Difference]: Start difference. First operand 770 states and 2207 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:12,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:28:12,858 INFO L93 Difference]: Finished difference Result 885 states and 2480 transitions. [2021-06-05 04:28:12,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:28:12,858 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:28:12,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:28:12,859 INFO L225 Difference]: With dead ends: 885 [2021-06-05 04:28:12,859 INFO L226 Difference]: Without dead ends: 885 [2021-06-05 04:28:12,860 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 441.8ms TimeCoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:28:12,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 885 states. [2021-06-05 04:28:12,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 885 to 767. [2021-06-05 04:28:12,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 767 states, 766 states have (on average 2.877284595300261) internal successors, (2204), 766 states have internal predecessors, (2204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:12,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 2204 transitions. [2021-06-05 04:28:12,867 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 2204 transitions. Word has length 17 [2021-06-05 04:28:12,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:28:12,867 INFO L482 AbstractCegarLoop]: Abstraction has 767 states and 2204 transitions. [2021-06-05 04:28:12,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:12,867 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 2204 transitions. [2021-06-05 04:28:12,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:28:12,868 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:28:12,868 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:28:13,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1772 [2021-06-05 04:28:13,073 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:28:13,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:28:13,073 INFO L82 PathProgramCache]: Analyzing trace with hash 504900070, now seen corresponding path program 254 times [2021-06-05 04:28:13,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:28:13,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274130313] [2021-06-05 04:28:13,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:28:13,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:28:13,156 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:13,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:28:13,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274130313] [2021-06-05 04:28:13,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274130313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:13,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122338264] [2021-06-05 04:28:13,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:13,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:28:13,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:28:13,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:28:13,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:28:13,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:13,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:13,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:13,339 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:13,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:28:13,343 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:13,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:28:13,347 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:13,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:28:13,352 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:13,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:13,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:13,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:28:13,356 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:13,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:28:13,359 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:13,389 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-05 04:28:13,389 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:28:13,390 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:28:13,391 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-05 04:28:13,419 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:13,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122338264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:13,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:28:13,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:28:13,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43083468] [2021-06-05 04:28:13,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:28:13,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:28:13,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:28:13,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:28:13,420 INFO L87 Difference]: Start difference. First operand 767 states and 2204 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:13,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:28:13,678 INFO L93 Difference]: Finished difference Result 860 states and 2428 transitions. [2021-06-05 04:28:13,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:28:13,678 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:28:13,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:28:13,679 INFO L225 Difference]: With dead ends: 860 [2021-06-05 04:28:13,679 INFO L226 Difference]: Without dead ends: 857 [2021-06-05 04:28:13,679 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 292.1ms TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:28:13,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2021-06-05 04:28:13,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 768. [2021-06-05 04:28:13,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 767 states have (on average 2.876140808344198) internal successors, (2206), 767 states have internal predecessors, (2206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:13,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 2206 transitions. [2021-06-05 04:28:13,686 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 2206 transitions. Word has length 17 [2021-06-05 04:28:13,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:28:13,686 INFO L482 AbstractCegarLoop]: Abstraction has 768 states and 2206 transitions. [2021-06-05 04:28:13,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:13,686 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 2206 transitions. [2021-06-05 04:28:13,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:28:13,687 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:28:13,687 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:28:13,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1775 [2021-06-05 04:28:13,888 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:28:13,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:28:13,888 INFO L82 PathProgramCache]: Analyzing trace with hash -809506716, now seen corresponding path program 255 times [2021-06-05 04:28:13,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:28:13,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074264411] [2021-06-05 04:28:13,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:28:13,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:28:13,983 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:13,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:28:13,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074264411] [2021-06-05 04:28:13,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074264411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:13,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759784210] [2021-06-05 04:28:13,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:14,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:28:14,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:28:14,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:28:14,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:28:14,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:14,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:14,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:14,143 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:14,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:14,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:28:14,146 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:14,168 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:28:14,168 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:28:14,169 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:28:14,169 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:28:14,189 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:14,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759784210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:14,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:28:14,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:28:14,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187430794] [2021-06-05 04:28:14,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:28:14,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:28:14,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:28:14,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:28:14,190 INFO L87 Difference]: Start difference. First operand 768 states and 2206 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:14,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:28:14,816 INFO L93 Difference]: Finished difference Result 955 states and 2603 transitions. [2021-06-05 04:28:14,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 04:28:14,816 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:28:14,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:28:14,817 INFO L225 Difference]: With dead ends: 955 [2021-06-05 04:28:14,817 INFO L226 Difference]: Without dead ends: 955 [2021-06-05 04:28:14,818 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 534.9ms TimeCoverageRelationStatistics Valid=143, Invalid=913, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:28:14,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2021-06-05 04:28:14,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 779. [2021-06-05 04:28:14,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 779 states, 778 states have (on average 2.884318766066838) internal successors, (2244), 778 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:14,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 2244 transitions. [2021-06-05 04:28:14,825 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 2244 transitions. Word has length 17 [2021-06-05 04:28:14,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:28:14,825 INFO L482 AbstractCegarLoop]: Abstraction has 779 states and 2244 transitions. [2021-06-05 04:28:14,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:14,825 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 2244 transitions. [2021-06-05 04:28:14,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:28:14,826 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:28:14,826 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:28:15,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 260 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1782 [2021-06-05 04:28:15,027 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:28:15,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:28:15,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1729207424, now seen corresponding path program 256 times [2021-06-05 04:28:15,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:28:15,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053906566] [2021-06-05 04:28:15,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:28:15,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:28:15,121 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:15,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:28:15,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053906566] [2021-06-05 04:28:15,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053906566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:15,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958302144] [2021-06-05 04:28:15,121 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:15,149 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:28:15,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:28:15,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:28:15,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:28:15,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:15,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:15,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:15,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:15,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:28:15,303 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:15,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:28:15,306 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:15,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:28:15,309 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:15,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:15,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:15,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:28:15,313 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:15,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:28:15,316 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:15,347 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-05 04:28:15,347 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:28:15,348 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:28:15,348 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-05 04:28:15,376 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:15,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958302144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:15,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:28:15,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:28:15,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865425735] [2021-06-05 04:28:15,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:28:15,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:28:15,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:28:15,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:28:15,377 INFO L87 Difference]: Start difference. First operand 779 states and 2244 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:15,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:28:15,716 INFO L93 Difference]: Finished difference Result 893 states and 2501 transitions. [2021-06-05 04:28:15,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:28:15,716 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:28:15,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:28:15,717 INFO L225 Difference]: With dead ends: 893 [2021-06-05 04:28:15,717 INFO L226 Difference]: Without dead ends: 891 [2021-06-05 04:28:15,717 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 361.5ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:28:15,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2021-06-05 04:28:15,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 784. [2021-06-05 04:28:15,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 783 states have (on average 2.8850574712643677) internal successors, (2259), 783 states have internal predecessors, (2259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:15,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 2259 transitions. [2021-06-05 04:28:15,725 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 2259 transitions. Word has length 17 [2021-06-05 04:28:15,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:28:15,725 INFO L482 AbstractCegarLoop]: Abstraction has 784 states and 2259 transitions. [2021-06-05 04:28:15,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:15,725 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 2259 transitions. [2021-06-05 04:28:15,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:28:15,726 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:28:15,726 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:28:15,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1785 [2021-06-05 04:28:15,926 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:28:15,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:28:15,926 INFO L82 PathProgramCache]: Analyzing trace with hash -801776318, now seen corresponding path program 257 times [2021-06-05 04:28:15,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:28:15,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459761250] [2021-06-05 04:28:15,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:28:15,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:28:16,013 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:16,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:28:16,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459761250] [2021-06-05 04:28:16,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459761250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:16,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963688997] [2021-06-05 04:28:16,013 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:16,041 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:28:16,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:28:16,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:28:16,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:28:16,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:16,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:16,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:16,142 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:16,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:16,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:16,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:28:16,146 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:16,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:16,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:16,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:16,149 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:16,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:16,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:28:16,152 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:16,186 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:28:16,186 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:28:16,186 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:28:16,186 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:28:16,245 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:16,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963688997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:16,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:28:16,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:28:16,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688980086] [2021-06-05 04:28:16,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:28:16,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:28:16,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:28:16,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:28:16,246 INFO L87 Difference]: Start difference. First operand 784 states and 2259 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:16,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:28:16,779 INFO L93 Difference]: Finished difference Result 980 states and 2646 transitions. [2021-06-05 04:28:16,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:28:16,779 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:28:16,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:28:16,780 INFO L225 Difference]: With dead ends: 980 [2021-06-05 04:28:16,780 INFO L226 Difference]: Without dead ends: 980 [2021-06-05 04:28:16,780 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 470.1ms TimeCoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:28:16,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2021-06-05 04:28:16,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 774. [2021-06-05 04:28:16,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 2.8783958602846056) internal successors, (2225), 773 states have internal predecessors, (2225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:16,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 2225 transitions. [2021-06-05 04:28:16,790 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 2225 transitions. Word has length 17 [2021-06-05 04:28:16,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:28:16,790 INFO L482 AbstractCegarLoop]: Abstraction has 774 states and 2225 transitions. [2021-06-05 04:28:16,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:16,790 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 2225 transitions. [2021-06-05 04:28:16,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:28:16,791 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:28:16,791 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:28:16,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1792,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:16,992 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:28:16,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:28:16,992 INFO L82 PathProgramCache]: Analyzing trace with hash -160090, now seen corresponding path program 258 times [2021-06-05 04:28:16,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:28:16,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931987978] [2021-06-05 04:28:16,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:28:16,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:28:17,084 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:17,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:28:17,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931987978] [2021-06-05 04:28:17,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931987978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:17,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797620152] [2021-06-05 04:28:17,084 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:17,112 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:28:17,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:28:17,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:28:17,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:28:17,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:17,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:17,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:17,215 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:17,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:17,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:17,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:28:17,219 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:17,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:17,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:17,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:17,222 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:17,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:17,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:28:17,225 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:17,260 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:28:17,260 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:28:17,260 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:28:17,260 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:28:17,326 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:17,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797620152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:17,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:28:17,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:28:17,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954407989] [2021-06-05 04:28:17,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:28:17,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:28:17,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:28:17,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:28:17,327 INFO L87 Difference]: Start difference. First operand 774 states and 2225 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:17,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:28:17,751 INFO L93 Difference]: Finished difference Result 898 states and 2493 transitions. [2021-06-05 04:28:17,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:28:17,752 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:28:17,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:28:17,753 INFO L225 Difference]: With dead ends: 898 [2021-06-05 04:28:17,753 INFO L226 Difference]: Without dead ends: 895 [2021-06-05 04:28:17,753 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 414.5ms TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:28:17,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2021-06-05 04:28:17,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 776. [2021-06-05 04:28:17,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 775 states have (on average 2.878709677419355) internal successors, (2231), 775 states have internal predecessors, (2231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:17,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 2231 transitions. [2021-06-05 04:28:17,760 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 2231 transitions. Word has length 17 [2021-06-05 04:28:17,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:28:17,760 INFO L482 AbstractCegarLoop]: Abstraction has 776 states and 2231 transitions. [2021-06-05 04:28:17,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:17,761 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 2231 transitions. [2021-06-05 04:28:17,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:28:17,761 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:28:17,761 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:28:17,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1796 [2021-06-05 04:28:17,962 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:28:17,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:28:17,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1718183616, now seen corresponding path program 259 times [2021-06-05 04:28:17,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:28:17,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920285329] [2021-06-05 04:28:17,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:28:17,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:28:18,061 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:18,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:28:18,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920285329] [2021-06-05 04:28:18,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920285329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:18,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215176632] [2021-06-05 04:28:18,062 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:18,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:28:18,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:28:18,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:28:18,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:18,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:18,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:18,191 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:18,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:18,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:18,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:28:18,194 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:18,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:18,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:18,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:18,198 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:18,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:18,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:28:18,201 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:18,234 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:28:18,235 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:28:18,235 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:28:18,235 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:28:18,289 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:18,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215176632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:18,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:28:18,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:28:18,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435567967] [2021-06-05 04:28:18,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:28:18,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:28:18,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:28:18,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:28:18,290 INFO L87 Difference]: Start difference. First operand 776 states and 2231 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:18,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:28:18,560 INFO L93 Difference]: Finished difference Result 896 states and 2491 transitions. [2021-06-05 04:28:18,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:28:18,560 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:28:18,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:28:18,561 INFO L225 Difference]: With dead ends: 896 [2021-06-05 04:28:18,561 INFO L226 Difference]: Without dead ends: 896 [2021-06-05 04:28:18,561 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 298.8ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:28:18,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2021-06-05 04:28:18,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 770. [2021-06-05 04:28:18,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 769 states have (on average 2.8764629388816645) internal successors, (2212), 769 states have internal predecessors, (2212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:18,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 2212 transitions. [2021-06-05 04:28:18,568 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 2212 transitions. Word has length 17 [2021-06-05 04:28:18,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:28:18,568 INFO L482 AbstractCegarLoop]: Abstraction has 770 states and 2212 transitions. [2021-06-05 04:28:18,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:18,568 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 2212 transitions. [2021-06-05 04:28:18,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:28:18,569 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:28:18,569 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:28:18,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1802 [2021-06-05 04:28:18,770 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:28:18,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:28:18,770 INFO L82 PathProgramCache]: Analyzing trace with hash -2143240642, now seen corresponding path program 260 times [2021-06-05 04:28:18,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:28:18,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534082432] [2021-06-05 04:28:18,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:28:18,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:28:18,850 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:18,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:28:18,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534082432] [2021-06-05 04:28:18,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534082432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:18,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950086753] [2021-06-05 04:28:18,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:18,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:28:18,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:28:18,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:28:18,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:28:18,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:18,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:18,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:28:18,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:19,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:19,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:19,002 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:19,025 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:28:19,025 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:28:19,026 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:28:19,026 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:28:19,046 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:19,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950086753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:19,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:28:19,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:28:19,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721831547] [2021-06-05 04:28:19,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:28:19,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:28:19,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:28:19,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:28:19,047 INFO L87 Difference]: Start difference. First operand 770 states and 2212 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:19,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:28:19,332 INFO L93 Difference]: Finished difference Result 897 states and 2509 transitions. [2021-06-05 04:28:19,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:28:19,332 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:28:19,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:28:19,333 INFO L225 Difference]: With dead ends: 897 [2021-06-05 04:28:19,333 INFO L226 Difference]: Without dead ends: 897 [2021-06-05 04:28:19,333 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 210.7ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:28:19,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2021-06-05 04:28:19,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 774. [2021-06-05 04:28:19,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 2.8771021992238035) internal successors, (2224), 773 states have internal predecessors, (2224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:19,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 2224 transitions. [2021-06-05 04:28:19,341 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 2224 transitions. Word has length 17 [2021-06-05 04:28:19,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:28:19,341 INFO L482 AbstractCegarLoop]: Abstraction has 774 states and 2224 transitions. [2021-06-05 04:28:19,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:19,341 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 2224 transitions. [2021-06-05 04:28:19,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:28:19,342 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:28:19,342 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:28:19,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1806,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:19,542 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:28:19,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:28:19,543 INFO L82 PathProgramCache]: Analyzing trace with hash -589191518, now seen corresponding path program 261 times [2021-06-05 04:28:19,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:28:19,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888704321] [2021-06-05 04:28:19,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:28:19,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:28:19,623 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:19,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:28:19,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888704321] [2021-06-05 04:28:19,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888704321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:19,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144356341] [2021-06-05 04:28:19,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:19,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:28:19,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:28:19,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:28:19,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:28:19,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:19,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:19,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:19,845 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:19,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:28:19,849 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:19,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:28:19,853 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:19,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:28:19,856 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:19,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:19,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:19,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:28:19,861 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:19,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:28:19,865 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:19,895 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-05 04:28:19,895 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:28:19,896 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:28:19,896 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-05 04:28:19,924 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:19,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144356341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:19,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:28:19,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:28:19,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827886496] [2021-06-05 04:28:19,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:28:19,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:28:19,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:28:19,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:28:19,925 INFO L87 Difference]: Start difference. First operand 774 states and 2224 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:20,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:28:20,287 INFO L93 Difference]: Finished difference Result 869 states and 2447 transitions. [2021-06-05 04:28:20,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:28:20,287 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:28:20,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:28:20,288 INFO L225 Difference]: With dead ends: 869 [2021-06-05 04:28:20,288 INFO L226 Difference]: Without dead ends: 863 [2021-06-05 04:28:20,288 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 384.2ms TimeCoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:28:20,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2021-06-05 04:28:20,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 774. [2021-06-05 04:28:20,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 2.8732212160413972) internal successors, (2221), 773 states have internal predecessors, (2221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:20,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 2221 transitions. [2021-06-05 04:28:20,295 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 2221 transitions. Word has length 17 [2021-06-05 04:28:20,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:28:20,296 INFO L482 AbstractCegarLoop]: Abstraction has 774 states and 2221 transitions. [2021-06-05 04:28:20,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:20,296 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 2221 transitions. [2021-06-05 04:28:20,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:28:20,296 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:28:20,296 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:28:20,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1809 [2021-06-05 04:28:20,497 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:28:20,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:28:20,497 INFO L82 PathProgramCache]: Analyzing trace with hash -288346720, now seen corresponding path program 262 times [2021-06-05 04:28:20,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:28:20,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573924891] [2021-06-05 04:28:20,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:28:20,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:28:20,579 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:20,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:28:20,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573924891] [2021-06-05 04:28:20,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573924891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:20,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226560937] [2021-06-05 04:28:20,579 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:20,606 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:28:20,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:28:20,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:28:20,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:28:20,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:20,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:20,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:20,698 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:20,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:20,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:20,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:28:20,702 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:20,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:20,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:20,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:20,705 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:20,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:20,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:28:20,708 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:20,742 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:28:20,742 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:28:20,743 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:28:20,743 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:28:20,813 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:20,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226560937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:20,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:28:20,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:28:20,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023248915] [2021-06-05 04:28:20,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:28:20,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:28:20,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:28:20,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:28:20,814 INFO L87 Difference]: Start difference. First operand 774 states and 2221 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:21,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:28:21,474 INFO L93 Difference]: Finished difference Result 915 states and 2541 transitions. [2021-06-05 04:28:21,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:28:21,475 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:28:21,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:28:21,476 INFO L225 Difference]: With dead ends: 915 [2021-06-05 04:28:21,476 INFO L226 Difference]: Without dead ends: 911 [2021-06-05 04:28:21,476 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 584.4ms TimeCoverageRelationStatistics Valid=149, Invalid=973, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 04:28:21,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 911 states. [2021-06-05 04:28:21,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 911 to 787. [2021-06-05 04:28:21,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 786 states have (on average 2.880407124681934) internal successors, (2264), 786 states have internal predecessors, (2264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:21,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 2264 transitions. [2021-06-05 04:28:21,483 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 2264 transitions. Word has length 17 [2021-06-05 04:28:21,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:28:21,483 INFO L482 AbstractCegarLoop]: Abstraction has 787 states and 2264 transitions. [2021-06-05 04:28:21,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:21,483 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 2264 transitions. [2021-06-05 04:28:21,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:28:21,484 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:28:21,484 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:28:21,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1816,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:21,685 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:28:21,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:28:21,685 INFO L82 PathProgramCache]: Analyzing trace with hash -830512924, now seen corresponding path program 263 times [2021-06-05 04:28:21,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:28:21,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48165803] [2021-06-05 04:28:21,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:28:21,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:28:21,761 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:21,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:28:21,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48165803] [2021-06-05 04:28:21,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48165803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:21,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994933921] [2021-06-05 04:28:21,761 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:21,788 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:28:21,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:28:21,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:28:21,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:28:21,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:21,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:21,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:28:21,902 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:21,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:21,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:21,905 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:21,927 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:28:21,927 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:28:21,928 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:28:21,928 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:28:21,948 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:21,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994933921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:21,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:28:21,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:28:21,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521591692] [2021-06-05 04:28:21,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:28:21,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:28:21,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:28:21,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:28:21,949 INFO L87 Difference]: Start difference. First operand 787 states and 2264 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:22,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:28:22,462 INFO L93 Difference]: Finished difference Result 1030 states and 2774 transitions. [2021-06-05 04:28:22,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 04:28:22,463 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:28:22,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:28:22,464 INFO L225 Difference]: With dead ends: 1030 [2021-06-05 04:28:22,464 INFO L226 Difference]: Without dead ends: 1030 [2021-06-05 04:28:22,464 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 335.7ms TimeCoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:28:22,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1030 states. [2021-06-05 04:28:22,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1030 to 811. [2021-06-05 04:28:22,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 811 states, 810 states have (on average 2.8925925925925924) internal successors, (2343), 810 states have internal predecessors, (2343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:22,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 2343 transitions. [2021-06-05 04:28:22,474 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 2343 transitions. Word has length 17 [2021-06-05 04:28:22,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:28:22,474 INFO L482 AbstractCegarLoop]: Abstraction has 811 states and 2343 transitions. [2021-06-05 04:28:22,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:22,474 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 2343 transitions. [2021-06-05 04:28:22,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:28:22,475 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:28:22,475 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:28:22,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1821 [2021-06-05 04:28:22,675 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:28:22,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:28:22,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1750213632, now seen corresponding path program 264 times [2021-06-05 04:28:22,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:28:22,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33027603] [2021-06-05 04:28:22,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:28:22,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:28:22,751 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:22,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:28:22,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33027603] [2021-06-05 04:28:22,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33027603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:22,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138868566] [2021-06-05 04:28:22,751 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:22,779 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:28:22,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:28:22,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:28:22,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:28:22,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:22,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:22,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:22,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:22,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:28:22,910 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:22,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:28:22,913 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:22,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:28:22,916 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:22,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:22,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:22,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:28:22,920 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:22,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:28:22,923 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:22,953 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-05 04:28:22,953 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:28:22,954 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:28:22,954 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-05 04:28:22,982 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:22,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138868566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:22,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:28:22,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:28:22,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714143757] [2021-06-05 04:28:22,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:28:22,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:28:22,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:28:22,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:28:22,983 INFO L87 Difference]: Start difference. First operand 811 states and 2343 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:23,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:28:23,581 INFO L93 Difference]: Finished difference Result 957 states and 2638 transitions. [2021-06-05 04:28:23,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 04:28:23,582 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:28:23,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:28:23,583 INFO L225 Difference]: With dead ends: 957 [2021-06-05 04:28:23,583 INFO L226 Difference]: Without dead ends: 953 [2021-06-05 04:28:23,583 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 508.2ms TimeCoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 04:28:23,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2021-06-05 04:28:23,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 811. [2021-06-05 04:28:23,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 811 states, 810 states have (on average 2.8814814814814813) internal successors, (2334), 810 states have internal predecessors, (2334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:23,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 2334 transitions. [2021-06-05 04:28:23,591 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 2334 transitions. Word has length 17 [2021-06-05 04:28:23,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:28:23,591 INFO L482 AbstractCegarLoop]: Abstraction has 811 states and 2334 transitions. [2021-06-05 04:28:23,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:23,591 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 2334 transitions. [2021-06-05 04:28:23,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:28:23,592 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:28:23,592 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:28:23,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1824 [2021-06-05 04:28:23,792 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:28:23,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:28:23,792 INFO L82 PathProgramCache]: Analyzing trace with hash 784738660, now seen corresponding path program 265 times [2021-06-05 04:28:23,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:28:23,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608746780] [2021-06-05 04:28:23,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:28:23,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:28:23,872 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:23,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:28:23,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608746780] [2021-06-05 04:28:23,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608746780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:23,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026124339] [2021-06-05 04:28:23,873 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:23,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:28:23,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:28:23,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:28:23,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:23,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:23,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:23,984 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:23,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:23,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:23,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:28:23,988 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:23,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:23,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:23,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:23,992 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:23,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:23,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:28:23,995 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:24,030 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:28:24,030 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:28:24,030 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:28:24,031 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:28:24,103 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:24,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026124339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:24,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:28:24,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:28:24,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509678212] [2021-06-05 04:28:24,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:28:24,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:28:24,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:28:24,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:28:24,104 INFO L87 Difference]: Start difference. First operand 811 states and 2334 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:25,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:28:25,071 INFO L93 Difference]: Finished difference Result 1032 states and 2765 transitions. [2021-06-05 04:28:25,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 04:28:25,071 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:28:25,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:28:25,073 INFO L225 Difference]: With dead ends: 1032 [2021-06-05 04:28:25,073 INFO L226 Difference]: Without dead ends: 1027 [2021-06-05 04:28:25,073 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 717.8ms TimeCoverageRelationStatistics Valid=200, Invalid=1440, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 04:28:25,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1027 states. [2021-06-05 04:28:25,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1027 to 815. [2021-06-05 04:28:25,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 815 states, 814 states have (on average 2.8771498771498774) internal successors, (2342), 814 states have internal predecessors, (2342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:25,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 815 states to 815 states and 2342 transitions. [2021-06-05 04:28:25,082 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 2342 transitions. Word has length 17 [2021-06-05 04:28:25,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:28:25,082 INFO L482 AbstractCegarLoop]: Abstraction has 815 states and 2342 transitions. [2021-06-05 04:28:25,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:25,082 INFO L276 IsEmpty]: Start isEmpty. Operand 815 states and 2342 transitions. [2021-06-05 04:28:25,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:28:25,082 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:28:25,083 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:28:25,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1831,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:25,283 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:28:25,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:28:25,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1982779774, now seen corresponding path program 266 times [2021-06-05 04:28:25,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:28:25,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592614652] [2021-06-05 04:28:25,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:28:25,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:28:25,390 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:25,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:28:25,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592614652] [2021-06-05 04:28:25,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592614652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:25,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712761431] [2021-06-05 04:28:25,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:25,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:28:25,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:28:25,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:28:25,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:28:25,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:25,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:25,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:25,532 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:25,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:25,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:25,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:28:25,536 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:25,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:25,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:25,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:25,540 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:25,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:25,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:28:25,544 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:25,583 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:28:25,584 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:28:25,584 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:28:25,585 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:28:25,644 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:25,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712761431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:25,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:28:25,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:28:25,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586018480] [2021-06-05 04:28:25,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:28:25,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:28:25,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:28:25,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:28:25,645 INFO L87 Difference]: Start difference. First operand 815 states and 2342 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:26,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:28:26,487 INFO L93 Difference]: Finished difference Result 1074 states and 2852 transitions. [2021-06-05 04:28:26,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 04:28:26,488 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:28:26,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:28:26,489 INFO L225 Difference]: With dead ends: 1074 [2021-06-05 04:28:26,489 INFO L226 Difference]: Without dead ends: 1074 [2021-06-05 04:28:26,489 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 641.5ms TimeCoverageRelationStatistics Valid=158, Invalid=1032, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:28:26,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2021-06-05 04:28:26,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 828. [2021-06-05 04:28:26,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 827 states have (on average 2.8851269649334945) internal successors, (2386), 827 states have internal predecessors, (2386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:26,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 2386 transitions. [2021-06-05 04:28:26,498 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 2386 transitions. Word has length 17 [2021-06-05 04:28:26,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:28:26,498 INFO L482 AbstractCegarLoop]: Abstraction has 828 states and 2386 transitions. [2021-06-05 04:28:26,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:26,498 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 2386 transitions. [2021-06-05 04:28:26,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:28:26,499 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:28:26,499 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:28:26,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1836,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:26,699 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:28:26,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:28:26,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1510571294, now seen corresponding path program 267 times [2021-06-05 04:28:26,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:28:26,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052129273] [2021-06-05 04:28:26,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:28:26,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:28:26,806 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:26,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:28:26,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052129273] [2021-06-05 04:28:26,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052129273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:26,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769883090] [2021-06-05 04:28:26,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:26,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:28:26,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:28:26,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:28:26,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:28:26,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:26,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:26,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:26,948 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:26,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:26,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:26,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:28:26,952 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:26,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:26,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:26,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:26,956 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:26,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:26,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:28:26,960 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:27,000 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:28:27,000 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:28:27,001 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:28:27,001 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:28:27,078 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:27,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769883090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:27,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:28:27,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:28:27,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491724848] [2021-06-05 04:28:27,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:28:27,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:28:27,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:28:27,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:28:27,079 INFO L87 Difference]: Start difference. First operand 828 states and 2386 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:28,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:28:28,168 INFO L93 Difference]: Finished difference Result 1059 states and 2837 transitions. [2021-06-05 04:28:28,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 04:28:28,168 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:28:28,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:28:28,169 INFO L225 Difference]: With dead ends: 1059 [2021-06-05 04:28:28,169 INFO L226 Difference]: Without dead ends: 1051 [2021-06-05 04:28:28,170 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 940.0ms TimeCoverageRelationStatistics Valid=226, Invalid=1936, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 04:28:28,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2021-06-05 04:28:28,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 840. [2021-06-05 04:28:28,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 839 states have (on average 2.8724672228843864) internal successors, (2410), 839 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:28,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 2410 transitions. [2021-06-05 04:28:28,178 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 2410 transitions. Word has length 17 [2021-06-05 04:28:28,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:28:28,179 INFO L482 AbstractCegarLoop]: Abstraction has 840 states and 2410 transitions. [2021-06-05 04:28:28,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:28,179 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 2410 transitions. [2021-06-05 04:28:28,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:28:28,179 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:28:28,179 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:28:28,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1840,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:28,380 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:28:28,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:28:28,380 INFO L82 PathProgramCache]: Analyzing trace with hash 207772412, now seen corresponding path program 268 times [2021-06-05 04:28:28,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:28:28,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11425326] [2021-06-05 04:28:28,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:28:28,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:28:28,486 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:28,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:28:28,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11425326] [2021-06-05 04:28:28,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11425326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:28,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747729286] [2021-06-05 04:28:28,487 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:28,521 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:28:28,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:28:28,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:28:28,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:28:28,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:28,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:28,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:28,639 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:28,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:28,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:28,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:28:28,643 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:28,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:28,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:28,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:28,647 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:28,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:28,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:28:28,651 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:28,691 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:28:28,691 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:28:28,692 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:28:28,692 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:28:28,752 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:28,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747729286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:28,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:28:28,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:28:28,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688273452] [2021-06-05 04:28:28,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:28:28,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:28:28,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:28:28,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:28:28,753 INFO L87 Difference]: Start difference. First operand 840 states and 2410 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:29,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:28:29,470 INFO L93 Difference]: Finished difference Result 1048 states and 2825 transitions. [2021-06-05 04:28:29,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 04:28:29,470 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:28:29,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:28:29,471 INFO L225 Difference]: With dead ends: 1048 [2021-06-05 04:28:29,471 INFO L226 Difference]: Without dead ends: 1048 [2021-06-05 04:28:29,472 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 593.0ms TimeCoverageRelationStatistics Valid=138, Invalid=918, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:28:29,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2021-06-05 04:28:29,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 836. [2021-06-05 04:28:29,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 836 states, 835 states have (on average 2.867065868263473) internal successors, (2394), 835 states have internal predecessors, (2394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:29,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 2394 transitions. [2021-06-05 04:28:29,480 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 2394 transitions. Word has length 17 [2021-06-05 04:28:29,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:28:29,480 INFO L482 AbstractCegarLoop]: Abstraction has 836 states and 2394 transitions. [2021-06-05 04:28:29,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:29,480 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 2394 transitions. [2021-06-05 04:28:29,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:28:29,481 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:28:29,481 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:28:29,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1846,273 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:29,681 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:28:29,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:28:29,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1502840896, now seen corresponding path program 269 times [2021-06-05 04:28:29,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:28:29,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828164676] [2021-06-05 04:28:29,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:28:29,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:28:29,821 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:29,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:28:29,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828164676] [2021-06-05 04:28:29,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828164676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:29,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744518963] [2021-06-05 04:28:29,822 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:29,857 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:28:29,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:28:29,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:28:29,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:28:30,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:30,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:30,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:30,010 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:30,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:30,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:28:30,013 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:30,035 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-06-05 04:28:30,035 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:28:30,035 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:28:30,035 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-06-05 04:28:30,063 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:30,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744518963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:30,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:28:30,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 04:28:30,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070464572] [2021-06-05 04:28:30,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:28:30,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:28:30,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:28:30,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:28:30,064 INFO L87 Difference]: Start difference. First operand 836 states and 2394 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:30,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:28:30,591 INFO L93 Difference]: Finished difference Result 1074 states and 2888 transitions. [2021-06-05 04:28:30,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:28:30,592 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:28:30,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:28:30,593 INFO L225 Difference]: With dead ends: 1074 [2021-06-05 04:28:30,593 INFO L226 Difference]: Without dead ends: 1074 [2021-06-05 04:28:30,593 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 340.4ms TimeCoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:28:30,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2021-06-05 04:28:30,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 836. [2021-06-05 04:28:30,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 836 states, 835 states have (on average 2.867065868263473) internal successors, (2394), 835 states have internal predecessors, (2394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:30,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 2394 transitions. [2021-06-05 04:28:30,609 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 2394 transitions. Word has length 17 [2021-06-05 04:28:30,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:28:30,609 INFO L482 AbstractCegarLoop]: Abstraction has 836 states and 2394 transitions. [2021-06-05 04:28:30,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:30,609 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 2394 transitions. [2021-06-05 04:28:30,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:28:30,610 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:28:30,610 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:28:30,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1850,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:30,832 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:28:30,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:28:30,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1801815964, now seen corresponding path program 270 times [2021-06-05 04:28:30,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:28:30,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898752865] [2021-06-05 04:28:30,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:28:30,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:28:30,930 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:30,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:28:30,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898752865] [2021-06-05 04:28:30,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898752865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:30,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117110850] [2021-06-05 04:28:30,931 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:30,965 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:28:30,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:28:30,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:28:30,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:28:31,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:31,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:31,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:31,153 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:31,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:31,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:28:31,156 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:31,183 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:28:31,184 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:28:31,184 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:28:31,184 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:28:31,209 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:31,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117110850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:31,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:28:31,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:28:31,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967345141] [2021-06-05 04:28:31,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:28:31,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:28:31,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:28:31,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:28:31,210 INFO L87 Difference]: Start difference. First operand 836 states and 2394 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:31,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:28:31,470 INFO L93 Difference]: Finished difference Result 964 states and 2644 transitions. [2021-06-05 04:28:31,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:28:31,470 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:28:31,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:28:31,471 INFO L225 Difference]: With dead ends: 964 [2021-06-05 04:28:31,471 INFO L226 Difference]: Without dead ends: 964 [2021-06-05 04:28:31,471 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 235.3ms TimeCoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:28:31,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 964 states. [2021-06-05 04:28:31,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 964 to 861. [2021-06-05 04:28:31,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 860 states have (on average 2.8686046511627907) internal successors, (2467), 860 states have internal predecessors, (2467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:31,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 2467 transitions. [2021-06-05 04:28:31,480 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 2467 transitions. Word has length 17 [2021-06-05 04:28:31,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:28:31,480 INFO L482 AbstractCegarLoop]: Abstraction has 861 states and 2467 transitions. [2021-06-05 04:28:31,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:31,480 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 2467 transitions. [2021-06-05 04:28:31,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:28:31,481 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:28:31,481 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:28:31,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1852,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:31,682 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:28:31,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:28:31,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1562268744, now seen corresponding path program 271 times [2021-06-05 04:28:31,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:28:31,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625238614] [2021-06-05 04:28:31,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:28:31,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:28:31,782 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:31,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:28:31,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625238614] [2021-06-05 04:28:31,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625238614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:31,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367808779] [2021-06-05 04:28:31,782 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:31,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:28:31,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:28:31,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:28:32,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:32,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:32,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:32,043 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:32,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:28:32,047 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:32,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:28:32,051 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:32,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:28:32,054 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:32,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:32,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:32,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:28:32,059 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:32,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:28:32,062 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:32,099 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-05 04:28:32,099 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:28:32,100 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:28:32,100 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-05 04:28:32,135 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:32,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367808779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:32,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:28:32,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:28:32,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430255061] [2021-06-05 04:28:32,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:28:32,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:28:32,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:28:32,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:28:32,136 INFO L87 Difference]: Start difference. First operand 861 states and 2467 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:32,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:28:32,747 INFO L93 Difference]: Finished difference Result 945 states and 2596 transitions. [2021-06-05 04:28:32,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:28:32,747 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:28:32,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:28:32,749 INFO L225 Difference]: With dead ends: 945 [2021-06-05 04:28:32,749 INFO L226 Difference]: Without dead ends: 937 [2021-06-05 04:28:32,749 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 564.6ms TimeCoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:28:32,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 937 states. [2021-06-05 04:28:32,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 937 to 866. [2021-06-05 04:28:32,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 2.8578034682080924) internal successors, (2472), 865 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:32,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 2472 transitions. [2021-06-05 04:28:32,760 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 2472 transitions. Word has length 17 [2021-06-05 04:28:32,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:28:32,760 INFO L482 AbstractCegarLoop]: Abstraction has 866 states and 2472 transitions. [2021-06-05 04:28:32,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:32,760 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 2472 transitions. [2021-06-05 04:28:32,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:28:32,761 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:28:32,761 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:28:32,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1855 [2021-06-05 04:28:32,982 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:28:32,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:28:32,982 INFO L82 PathProgramCache]: Analyzing trace with hash 640793850, now seen corresponding path program 272 times [2021-06-05 04:28:32,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:28:32,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303317042] [2021-06-05 04:28:32,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:28:32,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:28:33,101 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:33,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:28:33,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303317042] [2021-06-05 04:28:33,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303317042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:33,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144301697] [2021-06-05 04:28:33,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:33,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:28:33,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:28:33,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:28:33,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:28:33,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:33,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:33,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:33,284 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:33,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:33,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:28:33,288 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:33,311 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:28:33,312 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:28:33,312 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:28:33,312 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:28:33,333 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:33,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144301697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:33,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:28:33,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:28:33,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572083964] [2021-06-05 04:28:33,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:28:33,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:28:33,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:28:33,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:28:33,334 INFO L87 Difference]: Start difference. First operand 866 states and 2472 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:34,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:28:34,257 INFO L93 Difference]: Finished difference Result 1023 states and 2750 transitions. [2021-06-05 04:28:34,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 04:28:34,258 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:28:34,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:28:34,259 INFO L225 Difference]: With dead ends: 1023 [2021-06-05 04:28:34,259 INFO L226 Difference]: Without dead ends: 1023 [2021-06-05 04:28:34,259 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 846.3ms TimeCoverageRelationStatistics Valid=243, Invalid=1649, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 04:28:34,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2021-06-05 04:28:34,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 862. [2021-06-05 04:28:34,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 2.8664343786295006) internal successors, (2468), 861 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:34,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 2468 transitions. [2021-06-05 04:28:34,267 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 2468 transitions. Word has length 17 [2021-06-05 04:28:34,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:28:34,267 INFO L482 AbstractCegarLoop]: Abstraction has 862 states and 2468 transitions. [2021-06-05 04:28:34,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:34,268 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 2468 transitions. [2021-06-05 04:28:34,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:28:34,268 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:28:34,268 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:28:34,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1862 [2021-06-05 04:28:34,469 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:28:34,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:28:34,469 INFO L82 PathProgramCache]: Analyzing trace with hash -2100124322, now seen corresponding path program 273 times [2021-06-05 04:28:34,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:28:34,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893565856] [2021-06-05 04:28:34,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:28:34,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:28:34,574 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:34,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:28:34,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893565856] [2021-06-05 04:28:34,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893565856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:34,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909383109] [2021-06-05 04:28:34,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:34,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:28:34,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:28:34,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:28:34,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:28:34,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:34,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:34,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:34,827 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:34,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:28:34,831 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:34,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:28:34,835 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:34,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:28:34,839 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:34,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:34,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:34,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:28:34,843 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:34,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:28:34,847 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:34,883 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-05 04:28:34,883 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:28:34,884 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:28:34,885 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-05 04:28:34,919 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:34,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909383109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:34,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:28:34,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:28:34,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507223116] [2021-06-05 04:28:34,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:28:34,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:28:34,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:28:34,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:28:34,922 INFO L87 Difference]: Start difference. First operand 862 states and 2468 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:35,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:28:35,607 INFO L93 Difference]: Finished difference Result 947 states and 2603 transitions. [2021-06-05 04:28:35,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 04:28:35,607 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:28:35,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:28:35,608 INFO L225 Difference]: With dead ends: 947 [2021-06-05 04:28:35,608 INFO L226 Difference]: Without dead ends: 944 [2021-06-05 04:28:35,609 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 656.6ms TimeCoverageRelationStatistics Valid=137, Invalid=985, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 04:28:35,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 944 states. [2021-06-05 04:28:35,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 944 to 865. [2021-06-05 04:28:35,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 864 states have (on average 2.8622685185185186) internal successors, (2473), 864 states have internal predecessors, (2473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:35,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 2473 transitions. [2021-06-05 04:28:35,619 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 2473 transitions. Word has length 17 [2021-06-05 04:28:35,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:28:35,619 INFO L482 AbstractCegarLoop]: Abstraction has 865 states and 2473 transitions. [2021-06-05 04:28:35,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:35,619 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 2473 transitions. [2021-06-05 04:28:35,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:28:35,620 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:28:35,620 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:28:35,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1865 [2021-06-05 04:28:35,820 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:28:35,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:28:35,821 INFO L82 PathProgramCache]: Analyzing trace with hash 880436188, now seen corresponding path program 274 times [2021-06-05 04:28:35,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:28:35,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721405573] [2021-06-05 04:28:35,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:28:35,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:28:35,907 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:35,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:28:35,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721405573] [2021-06-05 04:28:35,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721405573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:35,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781412055] [2021-06-05 04:28:35,907 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:35,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:28:35,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:28:35,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:28:35,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:28:36,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:36,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:36,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:36,080 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:36,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:36,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:28:36,083 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:36,106 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:28:36,106 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:28:36,107 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:28:36,107 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:28:36,127 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:36,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781412055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:36,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:28:36,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:28:36,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764550018] [2021-06-05 04:28:36,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:28:36,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:28:36,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:28:36,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:28:36,128 INFO L87 Difference]: Start difference. First operand 865 states and 2473 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:36,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:28:36,946 INFO L93 Difference]: Finished difference Result 1010 states and 2733 transitions. [2021-06-05 04:28:36,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 04:28:36,946 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:28:36,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:28:36,948 INFO L225 Difference]: With dead ends: 1010 [2021-06-05 04:28:36,948 INFO L226 Difference]: Without dead ends: 1010 [2021-06-05 04:28:36,948 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 605.7ms TimeCoverageRelationStatistics Valid=161, Invalid=1099, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 04:28:36,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2021-06-05 04:28:36,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 862. [2021-06-05 04:28:36,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 2.8710801393728222) internal successors, (2472), 861 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:36,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 2472 transitions. [2021-06-05 04:28:36,956 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 2472 transitions. Word has length 17 [2021-06-05 04:28:36,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:28:36,956 INFO L482 AbstractCegarLoop]: Abstraction has 862 states and 2472 transitions. [2021-06-05 04:28:36,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:36,957 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 2472 transitions. [2021-06-05 04:28:36,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:28:36,957 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:28:36,957 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:28:37,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1872,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:37,158 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:28:37,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:28:37,158 INFO L82 PathProgramCache]: Analyzing trace with hash -39264520, now seen corresponding path program 275 times [2021-06-05 04:28:37,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:28:37,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286668236] [2021-06-05 04:28:37,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:28:37,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:28:37,246 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:37,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:28:37,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286668236] [2021-06-05 04:28:37,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286668236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:37,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929491848] [2021-06-05 04:28:37,246 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:37,274 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:28:37,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:28:37,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:28:37,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:28:37,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:37,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:37,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:37,439 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:37,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:28:37,442 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:37,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:28:37,445 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:37,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:28:37,448 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:37,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:37,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:37,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:28:37,452 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:37,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:28:37,455 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:37,486 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-05 04:28:37,486 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:28:37,487 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:28:37,487 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-05 04:28:37,515 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:37,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929491848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:37,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:28:37,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:28:37,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651823506] [2021-06-05 04:28:37,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:28:37,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:28:37,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:28:37,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:28:37,516 INFO L87 Difference]: Start difference. First operand 862 states and 2472 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:37,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:28:37,891 INFO L93 Difference]: Finished difference Result 902 states and 2550 transitions. [2021-06-05 04:28:37,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:28:37,891 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:28:37,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:28:37,892 INFO L225 Difference]: With dead ends: 902 [2021-06-05 04:28:37,892 INFO L226 Difference]: Without dead ends: 898 [2021-06-05 04:28:37,892 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 400.2ms TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:28:37,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2021-06-05 04:28:37,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 863. [2021-06-05 04:28:37,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 862 states have (on average 2.8677494199535962) internal successors, (2472), 862 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:37,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 2472 transitions. [2021-06-05 04:28:37,901 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 2472 transitions. Word has length 17 [2021-06-05 04:28:37,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:28:37,901 INFO L482 AbstractCegarLoop]: Abstraction has 863 states and 2472 transitions. [2021-06-05 04:28:37,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:37,901 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 2472 transitions. [2021-06-05 04:28:37,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:28:37,902 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:28:37,902 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:28:38,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1875,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:38,103 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:28:38,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:28:38,103 INFO L82 PathProgramCache]: Analyzing trace with hash 888166586, now seen corresponding path program 276 times [2021-06-05 04:28:38,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:28:38,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24792044] [2021-06-05 04:28:38,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:28:38,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:28:38,196 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:38,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:28:38,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24792044] [2021-06-05 04:28:38,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24792044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:38,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344229567] [2021-06-05 04:28:38,196 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:38,224 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:28:38,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:28:38,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:28:38,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:28:38,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:38,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:38,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:38,341 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:38,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:38,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:38,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:28:38,344 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:38,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:38,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:38,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:38,348 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:38,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:38,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:28:38,351 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:38,384 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:28:38,385 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:28:38,385 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:28:38,385 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:28:38,437 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:38,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344229567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:38,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:28:38,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:28:38,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883695973] [2021-06-05 04:28:38,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:28:38,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:28:38,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:28:38,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:28:38,437 INFO L87 Difference]: Start difference. First operand 863 states and 2472 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:38,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:28:38,954 INFO L93 Difference]: Finished difference Result 1025 states and 2754 transitions. [2021-06-05 04:28:38,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:28:38,954 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:28:38,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:28:38,955 INFO L225 Difference]: With dead ends: 1025 [2021-06-05 04:28:38,955 INFO L226 Difference]: Without dead ends: 1025 [2021-06-05 04:28:38,955 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 492.8ms TimeCoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:28:38,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1025 states. [2021-06-05 04:28:38,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1025 to 853. [2021-06-05 04:28:38,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 2.8615023474178405) internal successors, (2438), 852 states have internal predecessors, (2438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:38,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2438 transitions. [2021-06-05 04:28:38,964 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2438 transitions. Word has length 17 [2021-06-05 04:28:38,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:28:38,964 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2438 transitions. [2021-06-05 04:28:38,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:38,964 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2438 transitions. [2021-06-05 04:28:38,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:28:38,965 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:28:38,965 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:28:39,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1882 [2021-06-05 04:28:39,166 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:28:39,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:28:39,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1689782814, now seen corresponding path program 277 times [2021-06-05 04:28:39,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:28:39,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576039178] [2021-06-05 04:28:39,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:28:39,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:28:39,257 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:39,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:28:39,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576039178] [2021-06-05 04:28:39,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576039178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:39,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777209840] [2021-06-05 04:28:39,257 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:39,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:28:39,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:28:39,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:28:39,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:39,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:39,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:39,414 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:39,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:39,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:39,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:28:39,418 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:39,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:39,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:39,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:39,421 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:39,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:39,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:28:39,424 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:39,458 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:28:39,458 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:28:39,459 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:28:39,459 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:28:39,527 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:39,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777209840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:39,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:28:39,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:28:39,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634753742] [2021-06-05 04:28:39,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:28:39,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:28:39,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:28:39,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:28:39,528 INFO L87 Difference]: Start difference. First operand 853 states and 2438 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:40,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:28:40,203 INFO L93 Difference]: Finished difference Result 987 states and 2678 transitions. [2021-06-05 04:28:40,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 04:28:40,204 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:28:40,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:28:40,205 INFO L225 Difference]: With dead ends: 987 [2021-06-05 04:28:40,205 INFO L226 Difference]: Without dead ends: 983 [2021-06-05 04:28:40,205 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 633.6ms TimeCoverageRelationStatistics Valid=140, Invalid=982, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 04:28:40,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2021-06-05 04:28:40,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 866. [2021-06-05 04:28:40,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 2.871676300578035) internal successors, (2484), 865 states have internal predecessors, (2484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:40,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 2484 transitions. [2021-06-05 04:28:40,215 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 2484 transitions. Word has length 17 [2021-06-05 04:28:40,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:28:40,215 INFO L482 AbstractCegarLoop]: Abstraction has 866 states and 2484 transitions. [2021-06-05 04:28:40,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:40,215 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 2484 transitions. [2021-06-05 04:28:40,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:28:40,216 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:28:40,216 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:28:40,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1886,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:40,416 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:28:40,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:28:40,417 INFO L82 PathProgramCache]: Analyzing trace with hash -886840776, now seen corresponding path program 278 times [2021-06-05 04:28:40,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:28:40,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380716311] [2021-06-05 04:28:40,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:28:40,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:28:40,510 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:40,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:28:40,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380716311] [2021-06-05 04:28:40,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380716311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:40,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880308085] [2021-06-05 04:28:40,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:40,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:28:40,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:28:40,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:28:40,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:28:40,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:40,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:40,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:40,653 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:40,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:40,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:40,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:28:40,657 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:40,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:40,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:40,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:40,660 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:40,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:40,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:28:40,663 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:40,697 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:28:40,697 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:28:40,697 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:28:40,698 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:28:40,750 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:40,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880308085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:40,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:28:40,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:28:40,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571072684] [2021-06-05 04:28:40,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:28:40,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:28:40,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:28:40,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:28:40,751 INFO L87 Difference]: Start difference. First operand 866 states and 2484 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:41,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:28:41,075 INFO L93 Difference]: Finished difference Result 970 states and 2653 transitions. [2021-06-05 04:28:41,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:28:41,075 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:28:41,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:28:41,076 INFO L225 Difference]: With dead ends: 970 [2021-06-05 04:28:41,076 INFO L226 Difference]: Without dead ends: 970 [2021-06-05 04:28:41,077 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 344.9ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:28:41,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2021-06-05 04:28:41,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 859. [2021-06-05 04:28:41,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 858 states have (on average 2.865967365967366) internal successors, (2459), 858 states have internal predecessors, (2459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:41,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 2459 transitions. [2021-06-05 04:28:41,085 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 2459 transitions. Word has length 17 [2021-06-05 04:28:41,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:28:41,085 INFO L482 AbstractCegarLoop]: Abstraction has 859 states and 2459 transitions. [2021-06-05 04:28:41,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:41,085 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 2459 transitions. [2021-06-05 04:28:41,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:28:41,086 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:28:41,086 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:28:41,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1892 [2021-06-05 04:28:41,286 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:28:41,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:28:41,287 INFO L82 PathProgramCache]: Analyzing trace with hash -10398598, now seen corresponding path program 279 times [2021-06-05 04:28:41,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:28:41,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610411123] [2021-06-05 04:28:41,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:28:41,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:28:41,363 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:41,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:28:41,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610411123] [2021-06-05 04:28:41,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610411123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:41,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815939972] [2021-06-05 04:28:41,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:41,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:28:41,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:28:41,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:28:41,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:28:41,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:41,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:41,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:28:41,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:41,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:41,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:41,556 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:41,589 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:28:41,589 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:28:41,590 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:28:41,590 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:28:41,612 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:41,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815939972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:41,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:28:41,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 04:28:41,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422479199] [2021-06-05 04:28:41,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:28:41,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:28:41,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:28:41,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:28:41,613 INFO L87 Difference]: Start difference. First operand 859 states and 2459 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:41,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:28:41,879 INFO L93 Difference]: Finished difference Result 996 states and 2738 transitions. [2021-06-05 04:28:41,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:28:41,879 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:28:41,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:28:41,880 INFO L225 Difference]: With dead ends: 996 [2021-06-05 04:28:41,880 INFO L226 Difference]: Without dead ends: 996 [2021-06-05 04:28:41,880 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 193.4ms TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:28:41,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2021-06-05 04:28:41,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 875. [2021-06-05 04:28:41,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 874 states have (on average 2.871853546910755) internal successors, (2510), 874 states have internal predecessors, (2510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:41,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 2510 transitions. [2021-06-05 04:28:41,889 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 2510 transitions. Word has length 17 [2021-06-05 04:28:41,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:28:41,889 INFO L482 AbstractCegarLoop]: Abstraction has 875 states and 2510 transitions. [2021-06-05 04:28:41,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:41,889 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 2510 transitions. [2021-06-05 04:28:41,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:28:41,890 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:28:41,890 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:28:42,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1896,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:42,090 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:28:42,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:28:42,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1543650526, now seen corresponding path program 280 times [2021-06-05 04:28:42,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:28:42,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795138530] [2021-06-05 04:28:42,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:28:42,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:28:42,172 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:42,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:28:42,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795138530] [2021-06-05 04:28:42,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795138530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:42,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418496918] [2021-06-05 04:28:42,173 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:42,202 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:28:42,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:28:42,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:28:42,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:28:42,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:42,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:42,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:42,353 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:42,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:28:42,356 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:42,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:28:42,359 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:42,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:28:42,362 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:42,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:42,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:42,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:28:42,366 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:42,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:28:42,369 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:42,400 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-05 04:28:42,401 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:28:42,402 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:28:42,402 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-05 04:28:42,429 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:42,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418496918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:42,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:28:42,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 04:28:42,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855314163] [2021-06-05 04:28:42,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:28:42,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:28:42,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:28:42,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:28:42,430 INFO L87 Difference]: Start difference. First operand 875 states and 2510 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:42,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:28:42,877 INFO L93 Difference]: Finished difference Result 943 states and 2624 transitions. [2021-06-05 04:28:42,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:28:42,877 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:28:42,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:28:42,878 INFO L225 Difference]: With dead ends: 943 [2021-06-05 04:28:42,878 INFO L226 Difference]: Without dead ends: 937 [2021-06-05 04:28:42,879 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 399.1ms TimeCoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:28:42,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 937 states. [2021-06-05 04:28:42,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 937 to 876. [2021-06-05 04:28:42,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 875 states have (on average 2.865142857142857) internal successors, (2507), 875 states have internal predecessors, (2507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:42,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 2507 transitions. [2021-06-05 04:28:42,887 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 2507 transitions. Word has length 17 [2021-06-05 04:28:42,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:28:42,887 INFO L482 AbstractCegarLoop]: Abstraction has 876 states and 2507 transitions. [2021-06-05 04:28:42,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:42,887 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 2507 transitions. [2021-06-05 04:28:42,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:28:42,888 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:28:42,888 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:28:43,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1899 [2021-06-05 04:28:43,088 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:28:43,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:28:43,089 INFO L82 PathProgramCache]: Analyzing trace with hash 229243740, now seen corresponding path program 281 times [2021-06-05 04:28:43,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:28:43,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330187687] [2021-06-05 04:28:43,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:28:43,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:28:43,160 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:43,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:28:43,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330187687] [2021-06-05 04:28:43,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330187687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:43,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698464256] [2021-06-05 04:28:43,161 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:43,188 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:28:43,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:28:43,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:28:43,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:28:43,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:43,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:43,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:28:43,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:43,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:43,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:43,323 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:43,345 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:28:43,345 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:28:43,346 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:28:43,346 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:28:43,365 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:43,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698464256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:43,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:28:43,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 04:28:43,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861296697] [2021-06-05 04:28:43,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:28:43,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:28:43,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:28:43,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:28:43,366 INFO L87 Difference]: Start difference. First operand 876 states and 2507 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:43,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:28:43,918 INFO L93 Difference]: Finished difference Result 1010 states and 2764 transitions. [2021-06-05 04:28:43,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:28:43,918 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:28:43,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:28:43,919 INFO L225 Difference]: With dead ends: 1010 [2021-06-05 04:28:43,919 INFO L226 Difference]: Without dead ends: 1010 [2021-06-05 04:28:43,919 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 464.9ms TimeCoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:28:43,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2021-06-05 04:28:43,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 878. [2021-06-05 04:28:43,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 877 states have (on average 2.8677309007981755) internal successors, (2515), 877 states have internal predecessors, (2515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:43,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 2515 transitions. [2021-06-05 04:28:43,928 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 2515 transitions. Word has length 17 [2021-06-05 04:28:43,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:28:43,929 INFO L482 AbstractCegarLoop]: Abstraction has 878 states and 2515 transitions. [2021-06-05 04:28:43,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:43,929 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 2515 transitions. [2021-06-05 04:28:43,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:28:43,929 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:28:43,929 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:28:44,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1906,286 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:44,130 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:28:44,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:28:44,130 INFO L82 PathProgramCache]: Analyzing trace with hash -690456968, now seen corresponding path program 282 times [2021-06-05 04:28:44,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:28:44,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742788116] [2021-06-05 04:28:44,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:28:44,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:28:44,201 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:44,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:28:44,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742788116] [2021-06-05 04:28:44,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742788116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:44,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028562683] [2021-06-05 04:28:44,201 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:44,229 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:28:44,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:28:44,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:28:44,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:28:44,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:44,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:44,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:44,375 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:44,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:28:44,378 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:44,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:28:44,381 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:44,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:28:44,384 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:44,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:44,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:44,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:28:44,388 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:44,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:28:44,391 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:44,422 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-05 04:28:44,422 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:28:44,423 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:28:44,423 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-05 04:28:44,450 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:44,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028562683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:44,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:28:44,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 04:28:44,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82151971] [2021-06-05 04:28:44,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:28:44,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:28:44,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:28:44,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:28:44,451 INFO L87 Difference]: Start difference. First operand 878 states and 2515 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:45,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:28:45,040 INFO L93 Difference]: Finished difference Result 942 states and 2631 transitions. [2021-06-05 04:28:45,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:28:45,040 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:28:45,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:28:45,041 INFO L225 Difference]: With dead ends: 942 [2021-06-05 04:28:45,041 INFO L226 Difference]: Without dead ends: 938 [2021-06-05 04:28:45,042 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 490.6ms TimeCoverageRelationStatistics Valid=122, Invalid=808, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:28:45,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2021-06-05 04:28:45,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 881. [2021-06-05 04:28:45,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 881 states, 880 states have (on average 2.8625) internal successors, (2519), 880 states have internal predecessors, (2519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:45,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 881 states to 881 states and 2519 transitions. [2021-06-05 04:28:45,050 INFO L78 Accepts]: Start accepts. Automaton has 881 states and 2519 transitions. Word has length 17 [2021-06-05 04:28:45,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:28:45,050 INFO L482 AbstractCegarLoop]: Abstraction has 881 states and 2519 transitions. [2021-06-05 04:28:45,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:45,050 INFO L276 IsEmpty]: Start isEmpty. Operand 881 states and 2519 transitions. [2021-06-05 04:28:45,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:28:45,051 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:28:45,051 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:28:45,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 287 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1909 [2021-06-05 04:28:45,251 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:28:45,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:28:45,252 INFO L82 PathProgramCache]: Analyzing trace with hash 236974138, now seen corresponding path program 283 times [2021-06-05 04:28:45,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:28:45,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624694333] [2021-06-05 04:28:45,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:28:45,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:28:45,329 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:45,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:28:45,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624694333] [2021-06-05 04:28:45,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624694333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:45,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399562106] [2021-06-05 04:28:45,329 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:45,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:28:45,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:28:45,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:28:45,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:45,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:45,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:45,457 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:45,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:45,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:45,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:28:45,461 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:45,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:45,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:45,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:45,464 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:45,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:45,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:28:45,467 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:45,501 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:28:45,501 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:28:45,502 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:28:45,502 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:28:45,551 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:45,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399562106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:45,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:28:45,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 04:28:45,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683165468] [2021-06-05 04:28:45,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:28:45,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:28:45,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:28:45,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:28:45,552 INFO L87 Difference]: Start difference. First operand 881 states and 2519 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:46,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:28:46,090 INFO L93 Difference]: Finished difference Result 1004 states and 2739 transitions. [2021-06-05 04:28:46,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:28:46,091 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:28:46,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:28:46,092 INFO L225 Difference]: With dead ends: 1004 [2021-06-05 04:28:46,092 INFO L226 Difference]: Without dead ends: 1000 [2021-06-05 04:28:46,092 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 500.0ms TimeCoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:28:46,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1000 states. [2021-06-05 04:28:46,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1000 to 868. [2021-06-05 04:28:46,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 2.847750865051903) internal successors, (2469), 867 states have internal predecessors, (2469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:46,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 2469 transitions. [2021-06-05 04:28:46,101 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 2469 transitions. Word has length 17 [2021-06-05 04:28:46,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:28:46,101 INFO L482 AbstractCegarLoop]: Abstraction has 868 states and 2469 transitions. [2021-06-05 04:28:46,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:46,101 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 2469 transitions. [2021-06-05 04:28:46,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:28:46,102 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:28:46,102 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:28:46,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1916,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:46,302 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:28:46,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:28:46,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1038590366, now seen corresponding path program 284 times [2021-06-05 04:28:46,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:28:46,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315978847] [2021-06-05 04:28:46,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:28:46,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:28:46,378 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:46,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:28:46,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315978847] [2021-06-05 04:28:46,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315978847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:46,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796010676] [2021-06-05 04:28:46,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:46,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:28:46,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:28:46,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:28:46,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:28:46,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:46,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:46,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:46,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:46,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:46,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:46,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:28:46,510 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:46,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:46,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:46,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:46,514 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:46,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:46,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:28:46,517 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:46,551 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:28:46,551 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:28:46,551 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:28:46,552 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:28:46,616 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:46,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796010676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:46,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:28:46,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 04:28:46,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357886308] [2021-06-05 04:28:46,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:28:46,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:28:46,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:28:46,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:28:46,617 INFO L87 Difference]: Start difference. First operand 868 states and 2469 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:47,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:28:47,166 INFO L93 Difference]: Finished difference Result 951 states and 2639 transitions. [2021-06-05 04:28:47,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:28:47,166 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:28:47,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:28:47,167 INFO L225 Difference]: With dead ends: 951 [2021-06-05 04:28:47,167 INFO L226 Difference]: Without dead ends: 946 [2021-06-05 04:28:47,167 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 478.8ms TimeCoverageRelationStatistics Valid=137, Invalid=855, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:28:47,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2021-06-05 04:28:47,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 872. [2021-06-05 04:28:47,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 871 states have (on average 2.8495981630309988) internal successors, (2482), 871 states have internal predecessors, (2482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:47,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 2482 transitions. [2021-06-05 04:28:47,176 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 2482 transitions. Word has length 17 [2021-06-05 04:28:47,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:28:47,176 INFO L482 AbstractCegarLoop]: Abstraction has 872 states and 2482 transitions. [2021-06-05 04:28:47,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:47,176 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 2482 transitions. [2021-06-05 04:28:47,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:28:47,177 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:28:47,177 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:28:47,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1920,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:47,377 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:28:47,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:28:47,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1538033224, now seen corresponding path program 285 times [2021-06-05 04:28:47,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:28:47,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784499575] [2021-06-05 04:28:47,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:28:47,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:28:47,454 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:47,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:28:47,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784499575] [2021-06-05 04:28:47,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784499575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:47,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515408307] [2021-06-05 04:28:47,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:47,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:28:47,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:28:47,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:28:47,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:28:47,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:47,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:47,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:47,597 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:47,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:47,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:47,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:28:47,601 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:47,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:47,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:47,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:47,605 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:47,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:47,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:28:47,607 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:47,641 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:28:47,642 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:28:47,642 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:28:47,642 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:28:47,692 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:47,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515408307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:47,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:28:47,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 04:28:47,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463792861] [2021-06-05 04:28:47,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:28:47,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:28:47,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:28:47,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:28:47,693 INFO L87 Difference]: Start difference. First operand 872 states and 2482 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:48,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:28:48,084 INFO L93 Difference]: Finished difference Result 945 states and 2628 transitions. [2021-06-05 04:28:48,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:28:48,085 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:28:48,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:28:48,085 INFO L225 Difference]: With dead ends: 945 [2021-06-05 04:28:48,085 INFO L226 Difference]: Without dead ends: 945 [2021-06-05 04:28:48,086 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 385.3ms TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:28:48,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2021-06-05 04:28:48,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 862. [2021-06-05 04:28:48,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 2.849012775842044) internal successors, (2453), 861 states have internal predecessors, (2453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:48,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 2453 transitions. [2021-06-05 04:28:48,094 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 2453 transitions. Word has length 17 [2021-06-05 04:28:48,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:28:48,094 INFO L482 AbstractCegarLoop]: Abstraction has 862 states and 2453 transitions. [2021-06-05 04:28:48,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:48,094 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 2453 transitions. [2021-06-05 04:28:48,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:28:48,095 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:28:48,095 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:28:48,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1926 [2021-06-05 04:28:48,295 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:28:48,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:28:48,296 INFO L82 PathProgramCache]: Analyzing trace with hash 208237532, now seen corresponding path program 286 times [2021-06-05 04:28:48,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:28:48,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729257788] [2021-06-05 04:28:48,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:28:48,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:28:48,375 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:48,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:28:48,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729257788] [2021-06-05 04:28:48,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729257788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:48,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057183447] [2021-06-05 04:28:48,375 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:48,404 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:28:48,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:28:48,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:28:48,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:28:48,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:48,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:48,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:28:48,545 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:48,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:48,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:48,548 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:48,570 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:28:48,571 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:28:48,571 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:28:48,571 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:28:48,591 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:48,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057183447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:48,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:28:48,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 04:28:48,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11563212] [2021-06-05 04:28:48,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:28:48,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:28:48,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:28:48,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:28:48,591 INFO L87 Difference]: Start difference. First operand 862 states and 2453 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:48,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:28:48,837 INFO L93 Difference]: Finished difference Result 974 states and 2681 transitions. [2021-06-05 04:28:48,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:28:48,837 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:28:48,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:28:48,838 INFO L225 Difference]: With dead ends: 974 [2021-06-05 04:28:48,838 INFO L226 Difference]: Without dead ends: 974 [2021-06-05 04:28:48,838 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 235.4ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:28:48,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 974 states. [2021-06-05 04:28:48,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 974 to 861. [2021-06-05 04:28:48,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 860 states have (on average 2.85) internal successors, (2451), 860 states have internal predecessors, (2451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:48,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 2451 transitions. [2021-06-05 04:28:48,850 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 2451 transitions. Word has length 17 [2021-06-05 04:28:48,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:28:48,850 INFO L482 AbstractCegarLoop]: Abstraction has 861 states and 2451 transitions. [2021-06-05 04:28:48,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:48,850 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 2451 transitions. [2021-06-05 04:28:48,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:28:48,851 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:28:48,851 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:28:49,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1930,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:49,073 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:28:49,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:28:49,073 INFO L82 PathProgramCache]: Analyzing trace with hash -711463176, now seen corresponding path program 287 times [2021-06-05 04:28:49,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:28:49,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157968422] [2021-06-05 04:28:49,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:28:49,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:28:49,140 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:49,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:28:49,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157968422] [2021-06-05 04:28:49,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157968422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:49,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046051954] [2021-06-05 04:28:49,140 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:49,167 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:28:49,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:28:49,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:28:49,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:28:49,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:49,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:49,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:49,319 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:49,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:28:49,322 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:49,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:28:49,326 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:49,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:28:49,329 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:49,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:49,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:49,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:28:49,332 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:49,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:28:49,335 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:49,366 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-05 04:28:49,366 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:28:49,367 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:28:49,367 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-05 04:28:49,394 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:49,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046051954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:49,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:28:49,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 04:28:49,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474928401] [2021-06-05 04:28:49,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:28:49,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:28:49,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:28:49,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:28:49,395 INFO L87 Difference]: Start difference. First operand 861 states and 2451 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:49,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:28:49,898 INFO L93 Difference]: Finished difference Result 916 states and 2555 transitions. [2021-06-05 04:28:49,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:28:49,899 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:28:49,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:28:49,899 INFO L225 Difference]: With dead ends: 916 [2021-06-05 04:28:49,899 INFO L226 Difference]: Without dead ends: 912 [2021-06-05 04:28:49,900 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 436.5ms TimeCoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:28:49,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 912 states. [2021-06-05 04:28:49,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 912 to 861. [2021-06-05 04:28:49,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 860 states have (on average 2.8453488372093023) internal successors, (2447), 860 states have internal predecessors, (2447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:49,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 2447 transitions. [2021-06-05 04:28:49,908 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 2447 transitions. Word has length 17 [2021-06-05 04:28:49,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:28:49,908 INFO L482 AbstractCegarLoop]: Abstraction has 861 states and 2447 transitions. [2021-06-05 04:28:49,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:49,908 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 2447 transitions. [2021-06-05 04:28:49,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:28:49,909 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:28:49,909 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:28:50,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1933 [2021-06-05 04:28:50,109 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:28:50,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:28:50,109 INFO L82 PathProgramCache]: Analyzing trace with hash 215967930, now seen corresponding path program 288 times [2021-06-05 04:28:50,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:28:50,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496898468] [2021-06-05 04:28:50,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:28:50,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:28:50,178 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:50,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:28:50,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496898468] [2021-06-05 04:28:50,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496898468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:50,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178546859] [2021-06-05 04:28:50,179 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:50,206 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:28:50,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:28:50,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:28:50,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:28:50,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:50,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:50,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:50,296 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:50,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:50,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:50,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:28:50,300 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:50,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:50,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:50,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:50,303 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:50,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:50,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:28:50,306 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:50,339 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:28:50,340 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:28:50,340 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:28:50,340 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:28:50,390 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:50,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178546859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:50,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:28:50,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 04:28:50,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396821092] [2021-06-05 04:28:50,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:28:50,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:28:50,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:28:50,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:28:50,391 INFO L87 Difference]: Start difference. First operand 861 states and 2447 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:50,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:28:50,863 INFO L93 Difference]: Finished difference Result 970 states and 2638 transitions. [2021-06-05 04:28:50,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:28:50,864 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:28:50,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:28:50,865 INFO L225 Difference]: With dead ends: 970 [2021-06-05 04:28:50,865 INFO L226 Difference]: Without dead ends: 968 [2021-06-05 04:28:50,865 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 388.3ms TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:28:50,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2021-06-05 04:28:50,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 857. [2021-06-05 04:28:50,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 856 states have (on average 2.8376168224299065) internal successors, (2429), 856 states have internal predecessors, (2429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:50,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 2429 transitions. [2021-06-05 04:28:50,873 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 2429 transitions. Word has length 17 [2021-06-05 04:28:50,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:28:50,873 INFO L482 AbstractCegarLoop]: Abstraction has 857 states and 2429 transitions. [2021-06-05 04:28:50,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:50,873 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 2429 transitions. [2021-06-05 04:28:50,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:28:50,874 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:28:50,874 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:28:51,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1940,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:51,075 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:28:51,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:28:51,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1017584158, now seen corresponding path program 289 times [2021-06-05 04:28:51,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:28:51,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629699254] [2021-06-05 04:28:51,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:28:51,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:28:51,165 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:51,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:28:51,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629699254] [2021-06-05 04:28:51,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629699254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:51,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586311674] [2021-06-05 04:28:51,166 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:51,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:28:51,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:28:51,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:28:51,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:51,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:51,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:51,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:51,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:51,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:51,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:28:51,304 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:51,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:51,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:51,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:51,307 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:51,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:51,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:28:51,310 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:51,344 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:28:51,344 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:28:51,345 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:28:51,345 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:28:51,409 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:51,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586311674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:51,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:28:51,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 04:28:51,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693344941] [2021-06-05 04:28:51,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:28:51,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:28:51,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:28:51,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:28:51,410 INFO L87 Difference]: Start difference. First operand 857 states and 2429 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:52,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:28:52,097 INFO L93 Difference]: Finished difference Result 947 states and 2595 transitions. [2021-06-05 04:28:52,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 04:28:52,098 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:28:52,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:28:52,099 INFO L225 Difference]: With dead ends: 947 [2021-06-05 04:28:52,099 INFO L226 Difference]: Without dead ends: 943 [2021-06-05 04:28:52,099 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 652.0ms TimeCoverageRelationStatistics Valid=179, Invalid=1227, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 04:28:52,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-06-05 04:28:52,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 864. [2021-06-05 04:28:52,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 2.8296639629200464) internal successors, (2442), 863 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:52,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2442 transitions. [2021-06-05 04:28:52,107 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2442 transitions. Word has length 17 [2021-06-05 04:28:52,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:28:52,107 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 2442 transitions. [2021-06-05 04:28:52,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:52,107 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2442 transitions. [2021-06-05 04:28:52,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:28:52,108 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:28:52,108 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:28:52,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1944 [2021-06-05 04:28:52,308 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:28:52,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:28:52,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1559039432, now seen corresponding path program 290 times [2021-06-05 04:28:52,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:28:52,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175228091] [2021-06-05 04:28:52,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:28:52,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:28:52,396 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:52,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:28:52,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175228091] [2021-06-05 04:28:52,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175228091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:52,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662025934] [2021-06-05 04:28:52,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:52,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:28:52,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:28:52,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:28:52,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:28:52,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:52,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:52,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:52,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:52,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:52,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:52,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:28:52,556 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:52,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:52,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:52,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:52,560 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:52,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:52,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:28:52,564 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:52,604 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:28:52,604 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:28:52,605 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:28:52,605 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:28:52,665 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:52,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662025934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:52,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:28:52,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 04:28:52,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349038979] [2021-06-05 04:28:52,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:28:52,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:28:52,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:28:52,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:28:52,666 INFO L87 Difference]: Start difference. First operand 864 states and 2442 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:53,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:28:53,179 INFO L93 Difference]: Finished difference Result 939 states and 2592 transitions. [2021-06-05 04:28:53,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:28:53,179 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:28:53,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:28:53,180 INFO L225 Difference]: With dead ends: 939 [2021-06-05 04:28:53,180 INFO L226 Difference]: Without dead ends: 939 [2021-06-05 04:28:53,180 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 506.3ms TimeCoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:28:53,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2021-06-05 04:28:53,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 854. [2021-06-05 04:28:53,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 853 states have (on average 2.8253223915592027) internal successors, (2410), 853 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:53,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 2410 transitions. [2021-06-05 04:28:53,194 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 2410 transitions. Word has length 17 [2021-06-05 04:28:53,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:28:53,194 INFO L482 AbstractCegarLoop]: Abstraction has 854 states and 2410 transitions. [2021-06-05 04:28:53,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:53,194 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 2410 transitions. [2021-06-05 04:28:53,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:28:53,195 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:28:53,195 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:28:53,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1950,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:53,396 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:28:53,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:28:53,396 INFO L82 PathProgramCache]: Analyzing trace with hash -200351686, now seen corresponding path program 291 times [2021-06-05 04:28:53,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:28:53,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122542771] [2021-06-05 04:28:53,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:28:53,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:28:53,509 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:53,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:28:53,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122542771] [2021-06-05 04:28:53,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122542771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:53,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563023331] [2021-06-05 04:28:53,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:53,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:28:53,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:28:53,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:28:53,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:28:53,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:53,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:53,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:53,681 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:53,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:53,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:53,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:28:53,686 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:53,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:53,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:53,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:53,690 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:53,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:53,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:28:53,694 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:53,734 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:28:53,734 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:28:53,735 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:28:53,735 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:28:53,795 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:53,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563023331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:53,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:28:53,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:28:53,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395849236] [2021-06-05 04:28:53,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:28:53,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:28:53,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:28:53,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:28:53,796 INFO L87 Difference]: Start difference. First operand 854 states and 2410 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:54,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:28:54,440 INFO L93 Difference]: Finished difference Result 1033 states and 2758 transitions. [2021-06-05 04:28:54,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:28:54,441 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:28:54,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:28:54,442 INFO L225 Difference]: With dead ends: 1033 [2021-06-05 04:28:54,442 INFO L226 Difference]: Without dead ends: 1033 [2021-06-05 04:28:54,442 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 539.8ms TimeCoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:28:54,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1033 states. [2021-06-05 04:28:54,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1033 to 873. [2021-06-05 04:28:54,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 872 states have (on average 2.842889908256881) internal successors, (2479), 872 states have internal predecessors, (2479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:54,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 2479 transitions. [2021-06-05 04:28:54,454 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 2479 transitions. Word has length 17 [2021-06-05 04:28:54,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:28:54,454 INFO L482 AbstractCegarLoop]: Abstraction has 873 states and 2479 transitions. [2021-06-05 04:28:54,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:54,454 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 2479 transitions. [2021-06-05 04:28:54,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:28:54,455 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:28:54,455 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:28:54,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1954,296 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:54,677 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:28:54,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:28:54,678 INFO L82 PathProgramCache]: Analyzing trace with hash 601264542, now seen corresponding path program 292 times [2021-06-05 04:28:54,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:28:54,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949619709] [2021-06-05 04:28:54,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:28:54,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:28:54,788 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:54,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:28:54,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949619709] [2021-06-05 04:28:54,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949619709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:54,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520161343] [2021-06-05 04:28:54,789 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:54,838 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:28:54,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:28:54,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:28:54,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:28:54,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:54,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:54,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:54,973 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:54,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:54,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:54,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:28:54,978 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:54,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:54,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:54,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:54,982 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:54,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:54,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:28:54,985 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:55,025 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:28:55,025 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:28:55,026 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:28:55,026 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:28:55,104 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:55,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520161343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:55,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:28:55,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:28:55,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084134400] [2021-06-05 04:28:55,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:28:55,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:28:55,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:28:55,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:28:55,105 INFO L87 Difference]: Start difference. First operand 873 states and 2479 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:56,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:28:56,009 INFO L93 Difference]: Finished difference Result 1044 states and 2785 transitions. [2021-06-05 04:28:56,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 04:28:56,009 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:28:56,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:28:56,010 INFO L225 Difference]: With dead ends: 1044 [2021-06-05 04:28:56,010 INFO L226 Difference]: Without dead ends: 1034 [2021-06-05 04:28:56,010 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 803.6ms TimeCoverageRelationStatistics Valid=217, Invalid=1675, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 04:28:56,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2021-06-05 04:28:56,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 886. [2021-06-05 04:28:56,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 885 states have (on average 2.8350282485875704) internal successors, (2509), 885 states have internal predecessors, (2509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:56,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 2509 transitions. [2021-06-05 04:28:56,019 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 2509 transitions. Word has length 17 [2021-06-05 04:28:56,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:28:56,019 INFO L482 AbstractCegarLoop]: Abstraction has 886 states and 2509 transitions. [2021-06-05 04:28:56,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:56,019 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 2509 transitions. [2021-06-05 04:28:56,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:28:56,020 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:28:56,020 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:28:56,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1958 [2021-06-05 04:28:56,221 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:28:56,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:28:56,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1975359048, now seen corresponding path program 293 times [2021-06-05 04:28:56,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:28:56,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535863148] [2021-06-05 04:28:56,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:28:56,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:28:56,335 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:56,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:28:56,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535863148] [2021-06-05 04:28:56,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535863148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:56,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489062664] [2021-06-05 04:28:56,336 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:56,372 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:28:56,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:28:56,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:28:56,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:28:56,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:56,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:56,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:56,512 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:56,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:56,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:56,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:28:56,517 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:56,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:56,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:56,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:56,521 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:56,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:56,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:28:56,524 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:56,562 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:28:56,562 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:28:56,562 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:28:56,563 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:28:56,613 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:56,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489062664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:56,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:28:56,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:28:56,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814620826] [2021-06-05 04:28:56,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:28:56,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:28:56,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:28:56,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:28:56,614 INFO L87 Difference]: Start difference. First operand 886 states and 2509 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:57,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:28:57,200 INFO L93 Difference]: Finished difference Result 1034 states and 2759 transitions. [2021-06-05 04:28:57,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:28:57,200 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:28:57,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:28:57,201 INFO L225 Difference]: With dead ends: 1034 [2021-06-05 04:28:57,201 INFO L226 Difference]: Without dead ends: 1034 [2021-06-05 04:28:57,201 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 566.8ms TimeCoverageRelationStatistics Valid=148, Invalid=908, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:28:57,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2021-06-05 04:28:57,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 866. [2021-06-05 04:28:57,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 2.817341040462428) internal successors, (2437), 865 states have internal predecessors, (2437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:57,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 2437 transitions. [2021-06-05 04:28:57,210 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 2437 transitions. Word has length 17 [2021-06-05 04:28:57,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:28:57,210 INFO L482 AbstractCegarLoop]: Abstraction has 866 states and 2437 transitions. [2021-06-05 04:28:57,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:57,210 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 2437 transitions. [2021-06-05 04:28:57,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:28:57,211 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:28:57,211 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:28:57,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1964 [2021-06-05 04:28:57,412 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:28:57,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:28:57,412 INFO L82 PathProgramCache]: Analyzing trace with hash 608994940, now seen corresponding path program 294 times [2021-06-05 04:28:57,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:28:57,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802994462] [2021-06-05 04:28:57,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:28:57,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:28:57,518 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:57,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:28:57,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802994462] [2021-06-05 04:28:57,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802994462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:57,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146987005] [2021-06-05 04:28:57,518 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:57,553 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:28:57,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:28:57,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:28:57,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:28:57,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:57,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:57,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:57,700 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:57,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:57,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:28:57,703 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:57,721 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-06-05 04:28:57,721 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:28:57,721 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:28:57,721 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-06-05 04:28:57,745 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:57,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146987005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:57,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:28:57,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:28:57,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998209884] [2021-06-05 04:28:57,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:28:57,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:28:57,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:28:57,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:28:57,745 INFO L87 Difference]: Start difference. First operand 866 states and 2437 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:58,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:28:58,481 INFO L93 Difference]: Finished difference Result 1058 states and 2788 transitions. [2021-06-05 04:28:58,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 04:28:58,481 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:28:58,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:28:58,482 INFO L225 Difference]: With dead ends: 1058 [2021-06-05 04:28:58,482 INFO L226 Difference]: Without dead ends: 1058 [2021-06-05 04:28:58,482 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 652.9ms TimeCoverageRelationStatistics Valid=186, Invalid=1296, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 04:28:58,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2021-06-05 04:28:58,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 864. [2021-06-05 04:28:58,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 2.8157589803012746) internal successors, (2430), 863 states have internal predecessors, (2430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:58,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2430 transitions. [2021-06-05 04:28:58,491 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2430 transitions. Word has length 17 [2021-06-05 04:28:58,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:28:58,491 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 2430 transitions. [2021-06-05 04:28:58,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:58,491 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2430 transitions. [2021-06-05 04:28:58,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:28:58,492 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:28:58,492 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:28:58,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1968,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:58,693 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:28:58,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:28:58,693 INFO L82 PathProgramCache]: Analyzing trace with hash -880410056, now seen corresponding path program 295 times [2021-06-05 04:28:58,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:28:58,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428079516] [2021-06-05 04:28:58,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:28:58,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:28:58,789 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:58,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:28:58,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428079516] [2021-06-05 04:28:58,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428079516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:58,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054692879] [2021-06-05 04:28:58,790 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:58,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:28:58,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:28:58,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:28:58,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:58,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:58,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:28:58,979 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:58,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:28:58,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:28:58,997 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:28:59,035 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-06-05 04:28:59,035 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:28:59,035 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:28:59,036 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-06-05 04:28:59,079 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:59,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054692879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:59,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:28:59,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 04:28:59,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55037622] [2021-06-05 04:28:59,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:28:59,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:28:59,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:28:59,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:28:59,080 INFO L87 Difference]: Start difference. First operand 864 states and 2430 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:59,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:28:59,514 INFO L93 Difference]: Finished difference Result 998 states and 2668 transitions. [2021-06-05 04:28:59,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:28:59,514 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:28:59,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:28:59,515 INFO L225 Difference]: With dead ends: 998 [2021-06-05 04:28:59,515 INFO L226 Difference]: Without dead ends: 998 [2021-06-05 04:28:59,515 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 315.5ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:28:59,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2021-06-05 04:28:59,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 833. [2021-06-05 04:28:59,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 832 states have (on average 2.7992788461538463) internal successors, (2329), 832 states have internal predecessors, (2329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:59,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 2329 transitions. [2021-06-05 04:28:59,524 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 2329 transitions. Word has length 17 [2021-06-05 04:28:59,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:28:59,524 INFO L482 AbstractCegarLoop]: Abstraction has 833 states and 2329 transitions. [2021-06-05 04:28:59,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:28:59,524 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 2329 transitions. [2021-06-05 04:28:59,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:28:59,525 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:28:59,525 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:28:59,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1970 [2021-06-05 04:28:59,725 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:28:59,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:28:59,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1644528860, now seen corresponding path program 296 times [2021-06-05 04:28:59,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:28:59,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140949419] [2021-06-05 04:28:59,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:28:59,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:28:59,823 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:28:59,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:28:59,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140949419] [2021-06-05 04:28:59,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140949419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:28:59,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830927696] [2021-06-05 04:28:59,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:28:59,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:28:59,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:28:59,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:28:59,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:29:00,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:00,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:00,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:29:00,079 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:00,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:00,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:29:00,083 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:00,109 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:29:00,109 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:29:00,110 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:29:00,110 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:29:00,136 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:29:00,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830927696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:00,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:29:00,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:29:00,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287559466] [2021-06-05 04:29:00,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:29:00,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:29:00,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:29:00,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:29:00,137 INFO L87 Difference]: Start difference. First operand 833 states and 2329 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:00,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:29:00,502 INFO L93 Difference]: Finished difference Result 983 states and 2626 transitions. [2021-06-05 04:29:00,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:29:00,503 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:29:00,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:29:00,504 INFO L225 Difference]: With dead ends: 983 [2021-06-05 04:29:00,504 INFO L226 Difference]: Without dead ends: 983 [2021-06-05 04:29:00,504 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 269.3ms TimeCoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:29:00,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2021-06-05 04:29:00,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 873. [2021-06-05 04:29:00,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 872 states have (on average 2.819954128440367) internal successors, (2459), 872 states have internal predecessors, (2459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:00,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 2459 transitions. [2021-06-05 04:29:00,516 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 2459 transitions. Word has length 17 [2021-06-05 04:29:00,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:29:00,516 INFO L482 AbstractCegarLoop]: Abstraction has 873 states and 2459 transitions. [2021-06-05 04:29:00,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:00,516 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 2459 transitions. [2021-06-05 04:29:00,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:29:00,517 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:29:00,518 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:29:00,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1972,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:29:00,739 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:29:00,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:29:00,739 INFO L82 PathProgramCache]: Analyzing trace with hash -713646272, now seen corresponding path program 297 times [2021-06-05 04:29:00,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:29:00,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917282930] [2021-06-05 04:29:00,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:29:00,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:29:00,820 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:29:00,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:29:00,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917282930] [2021-06-05 04:29:00,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917282930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:00,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58875583] [2021-06-05 04:29:00,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:29:00,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:29:00,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:29:00,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:29:00,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:29:01,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:01,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:01,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:29:01,032 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:01,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:29:01,035 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:01,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:29:01,039 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:01,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:29:01,042 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:01,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:01,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:01,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:29:01,046 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:01,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:29:01,049 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:01,079 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-05 04:29:01,079 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:29:01,080 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:29:01,080 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-05 04:29:01,109 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:29:01,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58875583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:01,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:29:01,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:29:01,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487737208] [2021-06-05 04:29:01,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:29:01,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:29:01,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:29:01,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:29:01,110 INFO L87 Difference]: Start difference. First operand 873 states and 2459 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:01,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:29:01,556 INFO L93 Difference]: Finished difference Result 964 states and 2578 transitions. [2021-06-05 04:29:01,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:29:01,557 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:29:01,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:29:01,558 INFO L225 Difference]: With dead ends: 964 [2021-06-05 04:29:01,558 INFO L226 Difference]: Without dead ends: 956 [2021-06-05 04:29:01,558 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 473.7ms TimeCoverageRelationStatistics Valid=106, Invalid=886, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:29:01,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2021-06-05 04:29:01,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 879. [2021-06-05 04:29:01,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 879 states, 878 states have (on average 2.8086560364464694) internal successors, (2466), 878 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:01,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 2466 transitions. [2021-06-05 04:29:01,566 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 2466 transitions. Word has length 17 [2021-06-05 04:29:01,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:29:01,566 INFO L482 AbstractCegarLoop]: Abstraction has 879 states and 2466 transitions. [2021-06-05 04:29:01,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:01,566 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 2466 transitions. [2021-06-05 04:29:01,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:29:01,567 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:29:01,567 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:29:01,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1975 [2021-06-05 04:29:01,768 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:29:01,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:29:01,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1489416322, now seen corresponding path program 298 times [2021-06-05 04:29:01,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:29:01,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991394804] [2021-06-05 04:29:01,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:29:01,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:29:01,848 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:29:01,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:29:01,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991394804] [2021-06-05 04:29:01,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991394804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:01,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319342185] [2021-06-05 04:29:01,848 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:29:01,874 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:29:01,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:29:01,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:29:01,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:29:02,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:02,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:02,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:29:02,032 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:02,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:02,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:29:02,035 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:02,057 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:29:02,057 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:29:02,058 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:29:02,058 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:29:02,079 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:29:02,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319342185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:02,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:29:02,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:29:02,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606850963] [2021-06-05 04:29:02,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:29:02,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:29:02,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:29:02,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:29:02,080 INFO L87 Difference]: Start difference. First operand 879 states and 2466 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:02,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:29:02,952 INFO L93 Difference]: Finished difference Result 1061 states and 2767 transitions. [2021-06-05 04:29:02,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 04:29:02,953 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:29:02,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:29:02,954 INFO L225 Difference]: With dead ends: 1061 [2021-06-05 04:29:02,954 INFO L226 Difference]: Without dead ends: 1061 [2021-06-05 04:29:02,954 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 817.7ms TimeCoverageRelationStatistics Valid=246, Invalid=1734, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 04:29:02,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1061 states. [2021-06-05 04:29:02,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1061 to 874. [2021-06-05 04:29:02,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 873 states have (on average 2.8178694158075603) internal successors, (2460), 873 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:02,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 2460 transitions. [2021-06-05 04:29:02,965 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 2460 transitions. Word has length 17 [2021-06-05 04:29:02,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:29:02,965 INFO L482 AbstractCegarLoop]: Abstraction has 874 states and 2460 transitions. [2021-06-05 04:29:02,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:02,965 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 2460 transitions. [2021-06-05 04:29:02,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:29:02,966 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:29:02,966 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:29:03,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1982,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:29:03,166 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:29:03,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:29:03,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1251501850, now seen corresponding path program 299 times [2021-06-05 04:29:03,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:29:03,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649974035] [2021-06-05 04:29:03,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:29:03,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:29:03,251 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:29:03,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:29:03,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649974035] [2021-06-05 04:29:03,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649974035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:03,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409695691] [2021-06-05 04:29:03,251 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:29:03,279 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:29:03,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:29:03,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:29:03,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:29:03,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:03,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:03,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:29:03,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:03,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:29:03,470 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:03,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:29:03,473 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:03,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:29:03,476 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:03,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:03,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:03,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:29:03,480 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:03,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:29:03,483 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:03,521 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-05 04:29:03,521 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:29:03,522 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:29:03,522 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-05 04:29:03,554 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:29:03,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409695691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:03,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:29:03,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:29:03,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767333806] [2021-06-05 04:29:03,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:29:03,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:29:03,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:29:03,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:29:03,555 INFO L87 Difference]: Start difference. First operand 874 states and 2460 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:04,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:29:04,193 INFO L93 Difference]: Finished difference Result 969 states and 2587 transitions. [2021-06-05 04:29:04,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 04:29:04,193 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:29:04,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:29:04,194 INFO L225 Difference]: With dead ends: 969 [2021-06-05 04:29:04,195 INFO L226 Difference]: Without dead ends: 963 [2021-06-05 04:29:04,195 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 595.3ms TimeCoverageRelationStatistics Valid=146, Invalid=1114, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 04:29:04,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2021-06-05 04:29:04,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 876. [2021-06-05 04:29:04,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 875 states have (on average 2.8125714285714287) internal successors, (2461), 875 states have internal predecessors, (2461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:04,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 2461 transitions. [2021-06-05 04:29:04,203 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 2461 transitions. Word has length 17 [2021-06-05 04:29:04,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:29:04,203 INFO L482 AbstractCegarLoop]: Abstraction has 876 states and 2461 transitions. [2021-06-05 04:29:04,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:04,203 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 2461 transitions. [2021-06-05 04:29:04,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:29:04,204 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:29:04,204 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:29:04,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1985 [2021-06-05 04:29:04,404 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:29:04,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:29:04,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1729058660, now seen corresponding path program 300 times [2021-06-05 04:29:04,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:29:04,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958181480] [2021-06-05 04:29:04,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:29:04,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:29:04,492 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:29:04,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:29:04,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958181480] [2021-06-05 04:29:04,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958181480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:04,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562357864] [2021-06-05 04:29:04,493 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:29:04,521 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:29:04,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:29:04,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:29:04,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:29:04,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:04,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:04,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:29:04,693 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:04,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:04,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:29:04,696 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:04,718 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:29:04,718 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:29:04,719 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:29:04,719 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:29:04,740 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:29:04,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562357864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:04,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:29:04,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:29:04,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461581565] [2021-06-05 04:29:04,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:29:04,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:29:04,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:29:04,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:29:04,741 INFO L87 Difference]: Start difference. First operand 876 states and 2461 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:05,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:29:05,635 INFO L93 Difference]: Finished difference Result 1058 states and 2767 transitions. [2021-06-05 04:29:05,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 04:29:05,636 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:29:05,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:29:05,637 INFO L225 Difference]: With dead ends: 1058 [2021-06-05 04:29:05,637 INFO L226 Difference]: Without dead ends: 1056 [2021-06-05 04:29:05,637 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 689.9ms TimeCoverageRelationStatistics Valid=185, Invalid=1375, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 04:29:05,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2021-06-05 04:29:05,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 875. [2021-06-05 04:29:05,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 874 states have (on average 2.8215102974828374) internal successors, (2466), 874 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:05,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 2466 transitions. [2021-06-05 04:29:05,646 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 2466 transitions. Word has length 17 [2021-06-05 04:29:05,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:29:05,646 INFO L482 AbstractCegarLoop]: Abstraction has 875 states and 2466 transitions. [2021-06-05 04:29:05,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:05,646 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 2466 transitions. [2021-06-05 04:29:05,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:29:05,647 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:29:05,647 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:29:05,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1992 [2021-06-05 04:29:05,847 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:29:05,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:29:05,848 INFO L82 PathProgramCache]: Analyzing trace with hash 809357952, now seen corresponding path program 301 times [2021-06-05 04:29:05,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:29:05,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674243669] [2021-06-05 04:29:05,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:29:05,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:29:05,939 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:29:05,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:29:05,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674243669] [2021-06-05 04:29:05,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674243669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:05,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882354436] [2021-06-05 04:29:05,940 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:29:05,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:29:05,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:29:05,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:29:06,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:06,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:06,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:29:06,144 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:06,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:29:06,147 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:06,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:29:06,151 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:06,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:29:06,154 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:06,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:06,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:06,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:29:06,157 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:06,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:29:06,160 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:06,191 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-05 04:29:06,191 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:29:06,192 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:29:06,192 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-05 04:29:06,221 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:29:06,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882354436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:06,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:29:06,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:29:06,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003420427] [2021-06-05 04:29:06,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:29:06,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:29:06,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:29:06,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:29:06,222 INFO L87 Difference]: Start difference. First operand 875 states and 2466 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:06,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:29:06,860 INFO L93 Difference]: Finished difference Result 944 states and 2560 transitions. [2021-06-05 04:29:06,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:29:06,861 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:29:06,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:29:06,862 INFO L225 Difference]: With dead ends: 944 [2021-06-05 04:29:06,862 INFO L226 Difference]: Without dead ends: 940 [2021-06-05 04:29:06,862 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 579.8ms TimeCoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:29:06,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2021-06-05 04:29:06,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 876. [2021-06-05 04:29:06,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 875 states have (on average 2.816) internal successors, (2464), 875 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:06,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 2464 transitions. [2021-06-05 04:29:06,875 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 2464 transitions. Word has length 17 [2021-06-05 04:29:06,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:29:06,875 INFO L482 AbstractCegarLoop]: Abstraction has 876 states and 2464 transitions. [2021-06-05 04:29:06,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:06,876 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 2464 transitions. [2021-06-05 04:29:06,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:29:06,876 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:29:06,876 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:29:07,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1995 [2021-06-05 04:29:07,077 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:29:07,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:29:07,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1736789058, now seen corresponding path program 302 times [2021-06-05 04:29:07,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:29:07,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282660438] [2021-06-05 04:29:07,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:29:07,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:29:07,169 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:29:07,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:29:07,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282660438] [2021-06-05 04:29:07,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282660438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:07,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828157301] [2021-06-05 04:29:07,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:29:07,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:29:07,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:29:07,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:29:07,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:29:07,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:07,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:07,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:29:07,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:07,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:07,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:07,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:29:07,332 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:07,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:07,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:07,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:29:07,336 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:07,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:07,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:29:07,339 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:07,373 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:29:07,373 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:29:07,373 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:29:07,373 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:29:07,426 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:29:07,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828157301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:07,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:29:07,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:29:07,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843940511] [2021-06-05 04:29:07,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:29:07,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:29:07,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:29:07,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:29:07,427 INFO L87 Difference]: Start difference. First operand 876 states and 2464 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:08,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:29:08,037 INFO L93 Difference]: Finished difference Result 1040 states and 2679 transitions. [2021-06-05 04:29:08,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:29:08,038 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:29:08,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:29:08,039 INFO L225 Difference]: With dead ends: 1040 [2021-06-05 04:29:08,039 INFO L226 Difference]: Without dead ends: 1038 [2021-06-05 04:29:08,039 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 618.2ms TimeCoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 04:29:08,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2021-06-05 04:29:08,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 835. [2021-06-05 04:29:08,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 834 states have (on average 2.7841726618705036) internal successors, (2322), 834 states have internal predecessors, (2322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:08,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 2322 transitions. [2021-06-05 04:29:08,047 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 2322 transitions. Word has length 17 [2021-06-05 04:29:08,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:29:08,047 INFO L482 AbstractCegarLoop]: Abstraction has 835 states and 2322 transitions. [2021-06-05 04:29:08,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:08,047 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 2322 transitions. [2021-06-05 04:29:08,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:29:08,049 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:29:08,049 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:29:08,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2002 [2021-06-05 04:29:08,250 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:29:08,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:29:08,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1756562010, now seen corresponding path program 303 times [2021-06-05 04:29:08,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:29:08,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22023800] [2021-06-05 04:29:08,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:29:08,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:29:08,341 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:29:08,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:29:08,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22023800] [2021-06-05 04:29:08,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22023800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:08,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244795884] [2021-06-05 04:29:08,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:29:08,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:29:08,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:29:08,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:29:08,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:29:08,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:08,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:08,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:29:08,499 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:08,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:08,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:08,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:29:08,502 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:08,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:08,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:08,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:29:08,506 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:08,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:08,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:29:08,509 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:08,542 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:29:08,543 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:29:08,543 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:29:08,543 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:29:08,610 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:29:08,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244795884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:08,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:29:08,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:29:08,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545719022] [2021-06-05 04:29:08,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:29:08,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:29:08,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:29:08,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:29:08,611 INFO L87 Difference]: Start difference. First operand 835 states and 2322 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:09,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:29:09,272 INFO L93 Difference]: Finished difference Result 924 states and 2467 transitions. [2021-06-05 04:29:09,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:29:09,272 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:29:09,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:29:09,273 INFO L225 Difference]: With dead ends: 924 [2021-06-05 04:29:09,273 INFO L226 Difference]: Without dead ends: 920 [2021-06-05 04:29:09,274 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 600.5ms TimeCoverageRelationStatistics Valid=137, Invalid=919, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:29:09,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-06-05 04:29:09,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 840. [2021-06-05 04:29:09,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 839 states have (on average 2.7842669845053636) internal successors, (2336), 839 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:09,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 2336 transitions. [2021-06-05 04:29:09,282 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 2336 transitions. Word has length 17 [2021-06-05 04:29:09,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:29:09,282 INFO L482 AbstractCegarLoop]: Abstraction has 840 states and 2336 transitions. [2021-06-05 04:29:09,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:09,282 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 2336 transitions. [2021-06-05 04:29:09,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:29:09,283 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:29:09,283 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:29:09,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2006,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:29:09,483 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:29:09,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:29:09,483 INFO L82 PathProgramCache]: Analyzing trace with hash -38218304, now seen corresponding path program 304 times [2021-06-05 04:29:09,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:29:09,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194449239] [2021-06-05 04:29:09,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:29:09,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:29:09,581 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:29:09,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:29:09,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194449239] [2021-06-05 04:29:09,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194449239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:09,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991678605] [2021-06-05 04:29:09,581 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:29:09,609 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:29:09,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:29:09,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:29:09,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:29:09,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:09,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:09,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:29:09,743 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:09,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:09,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:09,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:29:09,747 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:09,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:09,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:09,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:29:09,751 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:09,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:09,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:29:09,753 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:09,787 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:29:09,788 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:29:09,788 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:29:09,788 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:29:09,841 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:29:09,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991678605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:09,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:29:09,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:29:09,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701103088] [2021-06-05 04:29:09,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:29:09,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:29:09,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:29:09,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:29:09,842 INFO L87 Difference]: Start difference. First operand 840 states and 2336 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:10,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:29:10,176 INFO L93 Difference]: Finished difference Result 915 states and 2451 transitions. [2021-06-05 04:29:10,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:29:10,176 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:29:10,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:29:10,177 INFO L225 Difference]: With dead ends: 915 [2021-06-05 04:29:10,177 INFO L226 Difference]: Without dead ends: 915 [2021-06-05 04:29:10,177 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 403.1ms TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:29:10,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2021-06-05 04:29:10,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 819. [2021-06-05 04:29:10,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 818 states have (on average 2.7811735941320292) internal successors, (2275), 818 states have internal predecessors, (2275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:10,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 2275 transitions. [2021-06-05 04:29:10,185 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 2275 transitions. Word has length 17 [2021-06-05 04:29:10,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:29:10,185 INFO L482 AbstractCegarLoop]: Abstraction has 819 states and 2275 transitions. [2021-06-05 04:29:10,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:10,185 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 2275 transitions. [2021-06-05 04:29:10,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:29:10,186 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:29:10,186 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:29:10,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2012 [2021-06-05 04:29:10,386 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:29:10,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:29:10,387 INFO L82 PathProgramCache]: Analyzing trace with hash -2044748640, now seen corresponding path program 305 times [2021-06-05 04:29:10,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:29:10,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726441889] [2021-06-05 04:29:10,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:29:10,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:29:10,459 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:29:10,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:29:10,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726441889] [2021-06-05 04:29:10,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726441889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:10,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961001757] [2021-06-05 04:29:10,459 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:29:10,493 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:29:10,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:29:10,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:29:10,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:29:10,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:10,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:10,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:29:10,632 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:10,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:10,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:10,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:29:10,636 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:10,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:10,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:10,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:29:10,639 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:10,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:10,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:29:10,642 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:10,676 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:29:10,676 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:29:10,677 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:29:10,677 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:29:10,747 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:29:10,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961001757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:10,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:29:10,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 04:29:10,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598181584] [2021-06-05 04:29:10,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:29:10,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:29:10,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:29:10,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:29:10,748 INFO L87 Difference]: Start difference. First operand 819 states and 2275 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:11,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:29:11,341 INFO L93 Difference]: Finished difference Result 851 states and 2323 transitions. [2021-06-05 04:29:11,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:29:11,342 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:29:11,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:29:11,343 INFO L225 Difference]: With dead ends: 851 [2021-06-05 04:29:11,343 INFO L226 Difference]: Without dead ends: 847 [2021-06-05 04:29:11,343 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 616.6ms TimeCoverageRelationStatistics Valid=154, Invalid=968, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 04:29:11,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2021-06-05 04:29:11,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 812. [2021-06-05 04:29:11,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 811 states have (on average 2.780517879161529) internal successors, (2255), 811 states have internal predecessors, (2255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:11,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 2255 transitions. [2021-06-05 04:29:11,351 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 2255 transitions. Word has length 17 [2021-06-05 04:29:11,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:29:11,351 INFO L482 AbstractCegarLoop]: Abstraction has 812 states and 2255 transitions. [2021-06-05 04:29:11,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:11,351 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 2255 transitions. [2021-06-05 04:29:11,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:29:11,352 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:29:11,352 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:29:11,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2016 [2021-06-05 04:29:11,552 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:29:11,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:29:11,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1683195326, now seen corresponding path program 306 times [2021-06-05 04:29:11,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:29:11,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48689008] [2021-06-05 04:29:11,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:29:11,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:29:11,636 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:29:11,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:29:11,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48689008] [2021-06-05 04:29:11,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48689008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:11,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836773896] [2021-06-05 04:29:11,637 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:29:11,683 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:29:11,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:29:11,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:29:11,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:29:11,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:11,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:11,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:29:11,834 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:11,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:11,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:29:11,837 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:11,859 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:29:11,859 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:29:11,860 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:29:11,860 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:29:11,880 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:29:11,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836773896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:11,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:29:11,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 04:29:11,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150255046] [2021-06-05 04:29:11,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:29:11,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:29:11,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:29:11,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:29:11,881 INFO L87 Difference]: Start difference. First operand 812 states and 2255 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:12,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:29:12,157 INFO L93 Difference]: Finished difference Result 940 states and 2502 transitions. [2021-06-05 04:29:12,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:29:12,158 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:29:12,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:29:12,159 INFO L225 Difference]: With dead ends: 940 [2021-06-05 04:29:12,159 INFO L226 Difference]: Without dead ends: 940 [2021-06-05 04:29:12,159 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 192.5ms TimeCoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:29:12,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2021-06-05 04:29:12,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 830. [2021-06-05 04:29:12,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 2.7889022919179736) internal successors, (2312), 829 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:12,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2312 transitions. [2021-06-05 04:29:12,167 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2312 transitions. Word has length 17 [2021-06-05 04:29:12,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:29:12,167 INFO L482 AbstractCegarLoop]: Abstraction has 830 states and 2312 transitions. [2021-06-05 04:29:12,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:12,167 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2312 transitions. [2021-06-05 04:29:12,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:29:12,168 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:29:12,168 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:29:12,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2021,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:29:12,368 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:29:12,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:29:12,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1057722846, now seen corresponding path program 307 times [2021-06-05 04:29:12,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:29:12,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420578531] [2021-06-05 04:29:12,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:29:12,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:29:12,439 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:29:12,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:29:12,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420578531] [2021-06-05 04:29:12,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420578531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:12,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870242136] [2021-06-05 04:29:12,440 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:29:12,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:29:12,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:29:12,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:29:12,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:12,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:12,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:29:12,634 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:12,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:29:12,637 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:12,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:29:12,641 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:12,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:29:12,644 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:12,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:12,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:12,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:29:12,647 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:12,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:29:12,650 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:12,681 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-05 04:29:12,681 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:29:12,682 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:29:12,682 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-05 04:29:12,710 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:29:12,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870242136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:12,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:29:12,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 04:29:12,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567315429] [2021-06-05 04:29:12,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:29:12,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:29:12,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:29:12,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:29:12,711 INFO L87 Difference]: Start difference. First operand 830 states and 2312 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:13,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:29:13,127 INFO L93 Difference]: Finished difference Result 894 states and 2398 transitions. [2021-06-05 04:29:13,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:29:13,128 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:29:13,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:29:13,129 INFO L225 Difference]: With dead ends: 894 [2021-06-05 04:29:13,129 INFO L226 Difference]: Without dead ends: 888 [2021-06-05 04:29:13,129 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 393.2ms TimeCoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:29:13,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 888 states. [2021-06-05 04:29:13,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 888 to 832. [2021-06-05 04:29:13,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 831 states have (on average 2.782190132370638) internal successors, (2312), 831 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:13,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 2312 transitions. [2021-06-05 04:29:13,137 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 2312 transitions. Word has length 17 [2021-06-05 04:29:13,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:29:13,137 INFO L482 AbstractCegarLoop]: Abstraction has 832 states and 2312 transitions. [2021-06-05 04:29:13,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:13,137 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 2312 transitions. [2021-06-05 04:29:13,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:29:13,137 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:29:13,138 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:29:13,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2024 [2021-06-05 04:29:13,338 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:29:13,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:29:13,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1922837664, now seen corresponding path program 308 times [2021-06-05 04:29:13,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:29:13,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672037444] [2021-06-05 04:29:13,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:29:13,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:29:13,419 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:29:13,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:29:13,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672037444] [2021-06-05 04:29:13,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672037444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:13,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534654750] [2021-06-05 04:29:13,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:29:13,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:29:13,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:29:13,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:29:13,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:29:13,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:13,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:13,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:29:13,593 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:13,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:13,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:29:13,596 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:13,618 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:29:13,618 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:29:13,619 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:29:13,619 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:29:13,639 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:29:13,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534654750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:13,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:29:13,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 04:29:13,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057932879] [2021-06-05 04:29:13,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:29:13,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:29:13,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:29:13,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:29:13,640 INFO L87 Difference]: Start difference. First operand 832 states and 2312 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:14,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:29:14,223 INFO L93 Difference]: Finished difference Result 951 states and 2519 transitions. [2021-06-05 04:29:14,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:29:14,223 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:29:14,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:29:14,224 INFO L225 Difference]: With dead ends: 951 [2021-06-05 04:29:14,224 INFO L226 Difference]: Without dead ends: 951 [2021-06-05 04:29:14,224 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 470.1ms TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:29:14,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-06-05 04:29:14,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 827. [2021-06-05 04:29:14,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 826 states have (on average 2.7869249394673123) internal successors, (2302), 826 states have internal predecessors, (2302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:14,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 2302 transitions. [2021-06-05 04:29:14,232 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 2302 transitions. Word has length 17 [2021-06-05 04:29:14,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:29:14,232 INFO L482 AbstractCegarLoop]: Abstraction has 827 states and 2302 transitions. [2021-06-05 04:29:14,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:14,232 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 2302 transitions. [2021-06-05 04:29:14,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:29:14,233 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:29:14,233 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:29:14,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2031,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:29:14,434 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:29:14,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:29:14,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1003136956, now seen corresponding path program 309 times [2021-06-05 04:29:14,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:29:14,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378372751] [2021-06-05 04:29:14,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:29:14,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:29:14,511 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:29:14,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:29:14,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378372751] [2021-06-05 04:29:14,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378372751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:14,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687971219] [2021-06-05 04:29:14,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:29:14,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:29:14,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:29:14,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:29:14,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:29:14,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:14,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:14,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:29:14,721 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:14,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:29:14,724 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:14,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:29:14,727 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:14,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:29:14,730 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:14,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:14,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:14,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:29:14,734 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:14,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:29:14,737 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:14,768 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-05 04:29:14,768 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:29:14,769 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:29:14,769 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-05 04:29:14,797 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:29:14,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687971219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:14,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:29:14,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 04:29:14,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98822308] [2021-06-05 04:29:14,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:29:14,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:29:14,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:29:14,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:29:14,798 INFO L87 Difference]: Start difference. First operand 827 states and 2302 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:15,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:29:15,307 INFO L93 Difference]: Finished difference Result 886 states and 2387 transitions. [2021-06-05 04:29:15,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:29:15,308 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:29:15,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:29:15,309 INFO L225 Difference]: With dead ends: 886 [2021-06-05 04:29:15,309 INFO L226 Difference]: Without dead ends: 882 [2021-06-05 04:29:15,309 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 490.4ms TimeCoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:29:15,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2021-06-05 04:29:15,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 828. [2021-06-05 04:29:15,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 827 states have (on average 2.7835550181378474) internal successors, (2302), 827 states have internal predecessors, (2302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:15,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 2302 transitions. [2021-06-05 04:29:15,316 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 2302 transitions. Word has length 17 [2021-06-05 04:29:15,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:29:15,316 INFO L482 AbstractCegarLoop]: Abstraction has 828 states and 2302 transitions. [2021-06-05 04:29:15,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:15,316 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 2302 transitions. [2021-06-05 04:29:15,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:29:15,317 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:29:15,317 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:29:15,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2034 [2021-06-05 04:29:15,518 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:29:15,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:29:15,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1930568062, now seen corresponding path program 310 times [2021-06-05 04:29:15,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:29:15,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897914424] [2021-06-05 04:29:15,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:29:15,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:29:15,590 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:29:15,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:29:15,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897914424] [2021-06-05 04:29:15,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897914424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:15,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113229194] [2021-06-05 04:29:15,591 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:29:15,617 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:29:15,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:29:15,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:29:15,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:29:15,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:15,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:15,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:29:15,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:15,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:15,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:15,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:29:15,735 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:15,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:15,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:15,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:29:15,738 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:15,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:15,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:29:15,741 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:15,775 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:29:15,775 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:29:15,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:29:15,775 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:29:15,825 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:29:15,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113229194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:15,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:29:15,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 04:29:15,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532662869] [2021-06-05 04:29:15,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:29:15,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:29:15,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:29:15,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:29:15,826 INFO L87 Difference]: Start difference. First operand 828 states and 2302 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:16,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:29:16,233 INFO L93 Difference]: Finished difference Result 982 states and 2548 transitions. [2021-06-05 04:29:16,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:29:16,233 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:29:16,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:29:16,234 INFO L225 Difference]: With dead ends: 982 [2021-06-05 04:29:16,234 INFO L226 Difference]: Without dead ends: 982 [2021-06-05 04:29:16,234 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 404.5ms TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:29:16,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2021-06-05 04:29:16,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 829. [2021-06-05 04:29:16,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 828 states have (on average 2.783816425120773) internal successors, (2305), 828 states have internal predecessors, (2305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:16,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 2305 transitions. [2021-06-05 04:29:16,243 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 2305 transitions. Word has length 17 [2021-06-05 04:29:16,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:29:16,243 INFO L482 AbstractCegarLoop]: Abstraction has 829 states and 2305 transitions. [2021-06-05 04:29:16,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:16,243 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 2305 transitions. [2021-06-05 04:29:16,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:29:16,243 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:29:16,244 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:29:16,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2041,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:29:16,444 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:29:16,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:29:16,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1562783006, now seen corresponding path program 311 times [2021-06-05 04:29:16,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:29:16,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187854365] [2021-06-05 04:29:16,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:29:16,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:29:16,528 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:29:16,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:29:16,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187854365] [2021-06-05 04:29:16,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187854365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:16,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620726451] [2021-06-05 04:29:16,529 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:29:16,557 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:29:16,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:29:16,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:29:16,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:29:16,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:16,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:16,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:29:16,673 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:16,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:16,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:16,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:29:16,677 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:16,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:16,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:16,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:29:16,680 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:16,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:16,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:29:16,683 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:16,717 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:29:16,717 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:29:16,718 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:29:16,718 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:29:16,784 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:29:16,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620726451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:16,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:29:16,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 04:29:16,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17230049] [2021-06-05 04:29:16,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:29:16,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:29:16,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:29:16,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:29:16,785 INFO L87 Difference]: Start difference. First operand 829 states and 2305 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:17,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:29:17,411 INFO L93 Difference]: Finished difference Result 927 states and 2463 transitions. [2021-06-05 04:29:17,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 04:29:17,411 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:29:17,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:29:17,412 INFO L225 Difference]: With dead ends: 927 [2021-06-05 04:29:17,412 INFO L226 Difference]: Without dead ends: 923 [2021-06-05 04:29:17,412 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 564.5ms TimeCoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:29:17,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2021-06-05 04:29:17,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 833. [2021-06-05 04:29:17,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 832 states have (on average 2.784855769230769) internal successors, (2317), 832 states have internal predecessors, (2317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:17,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 2317 transitions. [2021-06-05 04:29:17,423 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 2317 transitions. Word has length 17 [2021-06-05 04:29:17,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:29:17,423 INFO L482 AbstractCegarLoop]: Abstraction has 833 states and 2317 transitions. [2021-06-05 04:29:17,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:17,423 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 2317 transitions. [2021-06-05 04:29:17,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:29:17,429 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:29:17,429 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:29:17,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 316 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2045 [2021-06-05 04:29:17,629 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:29:17,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:29:17,630 INFO L82 PathProgramCache]: Analyzing trace with hash 155560700, now seen corresponding path program 312 times [2021-06-05 04:29:17,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:29:17,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567053078] [2021-06-05 04:29:17,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:29:17,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:29:17,707 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:29:17,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:29:17,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567053078] [2021-06-05 04:29:17,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567053078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:17,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734040528] [2021-06-05 04:29:17,708 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:29:17,735 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:29:17,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:29:17,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:29:17,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:29:17,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:17,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:17,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:29:17,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:17,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:17,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:17,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:29:17,852 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:17,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:17,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:17,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:29:17,855 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:17,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:17,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:29:17,858 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:17,892 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:29:17,892 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:29:17,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:29:17,892 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:29:17,944 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:29:17,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734040528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:17,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:29:17,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 04:29:17,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848346105] [2021-06-05 04:29:17,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:29:17,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:29:17,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:29:17,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:29:17,944 INFO L87 Difference]: Start difference. First operand 833 states and 2317 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:18,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:29:18,353 INFO L93 Difference]: Finished difference Result 915 states and 2448 transitions. [2021-06-05 04:29:18,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:29:18,354 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:29:18,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:29:18,355 INFO L225 Difference]: With dead ends: 915 [2021-06-05 04:29:18,355 INFO L226 Difference]: Without dead ends: 915 [2021-06-05 04:29:18,355 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 375.5ms TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:29:18,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2021-06-05 04:29:18,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 827. [2021-06-05 04:29:18,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 826 states have (on average 2.777239709443099) internal successors, (2294), 826 states have internal predecessors, (2294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:18,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 2294 transitions. [2021-06-05 04:29:18,363 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 2294 transitions. Word has length 17 [2021-06-05 04:29:18,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:29:18,363 INFO L482 AbstractCegarLoop]: Abstraction has 827 states and 2294 transitions. [2021-06-05 04:29:18,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:18,363 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 2294 transitions. [2021-06-05 04:29:18,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:29:18,364 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:29:18,364 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:29:18,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2051,317 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:29:18,564 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:29:18,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:29:18,565 INFO L82 PathProgramCache]: Analyzing trace with hash 316207332, now seen corresponding path program 313 times [2021-06-05 04:29:18,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:29:18,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795880876] [2021-06-05 04:29:18,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:29:18,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:29:18,628 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:29:18,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:29:18,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795880876] [2021-06-05 04:29:18,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795880876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:18,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390654227] [2021-06-05 04:29:18,629 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:29:18,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:29:18,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:29:18,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:29:18,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:18,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:18,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:29:18,763 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:18,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:18,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:18,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:29:18,767 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:18,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:18,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:18,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:29:18,770 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:18,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:18,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:29:18,773 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:18,807 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:29:18,808 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:29:18,808 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:29:18,808 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:29:18,878 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:29:18,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390654227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:18,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:29:18,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 04:29:18,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120048722] [2021-06-05 04:29:18,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:29:18,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:29:18,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:29:18,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:29:18,879 INFO L87 Difference]: Start difference. First operand 827 states and 2294 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:19,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:29:19,288 INFO L93 Difference]: Finished difference Result 861 states and 2351 transitions. [2021-06-05 04:29:19,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:29:19,288 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:29:19,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:29:19,289 INFO L225 Difference]: With dead ends: 861 [2021-06-05 04:29:19,289 INFO L226 Difference]: Without dead ends: 857 [2021-06-05 04:29:19,289 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 445.3ms TimeCoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:29:19,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2021-06-05 04:29:19,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 823. [2021-06-05 04:29:19,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 823 states, 822 states have (on average 2.778588807785888) internal successors, (2284), 822 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:19,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 823 states to 823 states and 2284 transitions. [2021-06-05 04:29:19,297 INFO L78 Accepts]: Start accepts. Automaton has 823 states and 2284 transitions. Word has length 17 [2021-06-05 04:29:19,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:29:19,297 INFO L482 AbstractCegarLoop]: Abstraction has 823 states and 2284 transitions. [2021-06-05 04:29:19,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:19,297 INFO L276 IsEmpty]: Start isEmpty. Operand 823 states and 2284 transitions. [2021-06-05 04:29:19,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:29:19,298 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:29:19,298 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:29:19,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2055,318 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:29:19,499 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:29:19,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:29:19,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1950236700, now seen corresponding path program 314 times [2021-06-05 04:29:19,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:29:19,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115131561] [2021-06-05 04:29:19,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:29:19,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:29:19,558 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:29:19,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:29:19,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115131561] [2021-06-05 04:29:19,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115131561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:19,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767470240] [2021-06-05 04:29:19,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:29:19,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:29:19,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:29:19,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:29:19,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:29:19,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:19,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:19,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:29:19,716 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:19,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:19,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:29:19,719 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:19,741 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:29:19,742 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:29:19,742 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:29:19,742 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:29:19,761 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:29:19,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767470240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:19,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:29:19,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 04:29:19,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080625734] [2021-06-05 04:29:19,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:29:19,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:29:19,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:29:19,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:29:19,762 INFO L87 Difference]: Start difference. First operand 823 states and 2284 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:19,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:29:19,971 INFO L93 Difference]: Finished difference Result 932 states and 2492 transitions. [2021-06-05 04:29:19,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:29:19,972 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:29:19,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:29:19,972 INFO L225 Difference]: With dead ends: 932 [2021-06-05 04:29:19,972 INFO L226 Difference]: Without dead ends: 932 [2021-06-05 04:29:19,973 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 156.1ms TimeCoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:29:19,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 932 states. [2021-06-05 04:29:19,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 932 to 838. [2021-06-05 04:29:19,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 837 states have (on average 2.7897252090800477) internal successors, (2335), 837 states have internal predecessors, (2335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:19,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 2335 transitions. [2021-06-05 04:29:19,981 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 2335 transitions. Word has length 17 [2021-06-05 04:29:19,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:29:19,981 INFO L482 AbstractCegarLoop]: Abstraction has 838 states and 2335 transitions. [2021-06-05 04:29:19,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:19,981 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 2335 transitions. [2021-06-05 04:29:19,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:29:19,982 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:29:19,982 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:29:20,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2060 [2021-06-05 04:29:20,182 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:29:20,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:29:20,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1425029888, now seen corresponding path program 315 times [2021-06-05 04:29:20,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:29:20,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053922722] [2021-06-05 04:29:20,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:29:20,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:29:20,240 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:29:20,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:29:20,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053922722] [2021-06-05 04:29:20,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053922722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:20,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89039601] [2021-06-05 04:29:20,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:29:20,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:29:20,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:29:20,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:29:20,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:29:20,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:20,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:20,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:29:20,414 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:20,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:29:20,418 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:20,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:29:20,421 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:20,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:29:20,424 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:20,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:20,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:20,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:29:20,428 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:20,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:29:20,430 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:20,461 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-05 04:29:20,462 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:29:20,462 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:29:20,463 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-05 04:29:20,489 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:29:20,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89039601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:20,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:29:20,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 04:29:20,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125501820] [2021-06-05 04:29:20,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:29:20,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:29:20,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:29:20,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:29:20,490 INFO L87 Difference]: Start difference. First operand 838 states and 2335 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:20,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:29:20,857 INFO L93 Difference]: Finished difference Result 896 states and 2417 transitions. [2021-06-05 04:29:20,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:29:20,857 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:29:20,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:29:20,858 INFO L225 Difference]: With dead ends: 896 [2021-06-05 04:29:20,858 INFO L226 Difference]: Without dead ends: 892 [2021-06-05 04:29:20,859 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 327.2ms TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:29:20,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 892 states. [2021-06-05 04:29:20,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 892 to 838. [2021-06-05 04:29:20,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 837 states have (on average 2.7873357228195936) internal successors, (2333), 837 states have internal predecessors, (2333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:20,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 2333 transitions. [2021-06-05 04:29:20,866 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 2333 transitions. Word has length 17 [2021-06-05 04:29:20,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:29:20,866 INFO L482 AbstractCegarLoop]: Abstraction has 838 states and 2333 transitions. [2021-06-05 04:29:20,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:20,867 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 2333 transitions. [2021-06-05 04:29:20,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:29:20,867 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:29:20,867 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:29:21,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2063,320 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:29:21,068 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:29:21,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:29:21,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1942506302, now seen corresponding path program 316 times [2021-06-05 04:29:21,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:29:21,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648795069] [2021-06-05 04:29:21,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:29:21,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:29:21,131 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:29:21,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:29:21,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648795069] [2021-06-05 04:29:21,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648795069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:21,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711698688] [2021-06-05 04:29:21,131 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:29:21,163 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:29:21,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:29:21,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:29:21,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:29:21,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:21,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:21,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:29:21,264 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:21,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:21,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:21,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:29:21,268 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:21,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:21,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:21,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:29:21,271 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:21,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:21,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:29:21,274 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:21,308 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:29:21,308 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:29:21,308 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:29:21,309 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:29:21,357 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:29:21,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711698688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:21,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:29:21,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 04:29:21,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375967430] [2021-06-05 04:29:21,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:29:21,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:29:21,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:29:21,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:29:21,358 INFO L87 Difference]: Start difference. First operand 838 states and 2333 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:21,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:29:21,647 INFO L93 Difference]: Finished difference Result 949 states and 2506 transitions. [2021-06-05 04:29:21,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:29:21,647 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:29:21,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:29:21,648 INFO L225 Difference]: With dead ends: 949 [2021-06-05 04:29:21,648 INFO L226 Difference]: Without dead ends: 948 [2021-06-05 04:29:21,648 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 270.7ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:29:21,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 948 states. [2021-06-05 04:29:21,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 948 to 839. [2021-06-05 04:29:21,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 839 states, 838 states have (on average 2.788782816229117) internal successors, (2337), 838 states have internal predecessors, (2337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:21,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 2337 transitions. [2021-06-05 04:29:21,656 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 2337 transitions. Word has length 17 [2021-06-05 04:29:21,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:29:21,656 INFO L482 AbstractCegarLoop]: Abstraction has 839 states and 2337 transitions. [2021-06-05 04:29:21,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:21,656 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 2337 transitions. [2021-06-05 04:29:21,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:29:21,657 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:29:21,657 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:29:21,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2070,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:29:21,857 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:29:21,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:29:21,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1140890074, now seen corresponding path program 317 times [2021-06-05 04:29:21,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:29:21,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517042292] [2021-06-05 04:29:21,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:29:21,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:29:21,921 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:29:21,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:29:21,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517042292] [2021-06-05 04:29:21,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517042292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:21,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986819873] [2021-06-05 04:29:21,921 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:29:21,949 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:29:21,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:29:21,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:29:21,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:29:22,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:22,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:22,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:29:22,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:22,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:22,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:22,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:29:22,053 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:22,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:22,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:22,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:29:22,056 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:22,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:22,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:29:22,059 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:22,093 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:29:22,093 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:29:22,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:29:22,094 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:29:22,158 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:29:22,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986819873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:22,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:29:22,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 04:29:22,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528789457] [2021-06-05 04:29:22,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:29:22,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:29:22,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:29:22,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:29:22,159 INFO L87 Difference]: Start difference. First operand 839 states and 2337 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:22,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:29:22,673 INFO L93 Difference]: Finished difference Result 925 states and 2478 transitions. [2021-06-05 04:29:22,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:29:22,673 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:29:22,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:29:22,674 INFO L225 Difference]: With dead ends: 925 [2021-06-05 04:29:22,675 INFO L226 Difference]: Without dead ends: 921 [2021-06-05 04:29:22,675 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 435.0ms TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:29:22,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2021-06-05 04:29:22,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 844. [2021-06-05 04:29:22,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 843 states have (on average 2.792408066429419) internal successors, (2354), 843 states have internal predecessors, (2354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:22,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 2354 transitions. [2021-06-05 04:29:22,683 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 2354 transitions. Word has length 17 [2021-06-05 04:29:22,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:29:22,683 INFO L482 AbstractCegarLoop]: Abstraction has 844 states and 2354 transitions. [2021-06-05 04:29:22,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:22,683 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 2354 transitions. [2021-06-05 04:29:22,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:29:22,684 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:29:22,684 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:29:22,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2074,322 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:29:22,884 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:29:22,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:29:22,884 INFO L82 PathProgramCache]: Analyzing trace with hash 577453632, now seen corresponding path program 318 times [2021-06-05 04:29:22,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:29:22,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280153444] [2021-06-05 04:29:22,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:29:22,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:29:22,953 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:29:22,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:29:22,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280153444] [2021-06-05 04:29:22,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280153444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:22,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485337867] [2021-06-05 04:29:22,953 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:29:22,981 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:29:22,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:29:22,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:29:22,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:29:23,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:23,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:23,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:29:23,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:23,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:23,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:23,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:29:23,086 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:23,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:23,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:23,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:29:23,089 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:23,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:23,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:29:23,092 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:23,126 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:29:23,126 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:29:23,127 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:29:23,127 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:29:23,176 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:29:23,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485337867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:23,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:29:23,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 04:29:23,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264180702] [2021-06-05 04:29:23,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:29:23,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:29:23,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:29:23,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:29:23,177 INFO L87 Difference]: Start difference. First operand 844 states and 2354 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:23,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:29:23,517 INFO L93 Difference]: Finished difference Result 912 states and 2456 transitions. [2021-06-05 04:29:23,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:29:23,518 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:29:23,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:29:23,518 INFO L225 Difference]: With dead ends: 912 [2021-06-05 04:29:23,518 INFO L226 Difference]: Without dead ends: 912 [2021-06-05 04:29:23,519 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 267.0ms TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:29:23,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 912 states. [2021-06-05 04:29:23,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 912 to 826. [2021-06-05 04:29:23,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 825 states have (on average 2.7793939393939393) internal successors, (2293), 825 states have internal predecessors, (2293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:23,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 2293 transitions. [2021-06-05 04:29:23,526 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 2293 transitions. Word has length 17 [2021-06-05 04:29:23,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:29:23,526 INFO L482 AbstractCegarLoop]: Abstraction has 826 states and 2293 transitions. [2021-06-05 04:29:23,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:23,526 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 2293 transitions. [2021-06-05 04:29:23,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:29:23,527 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:29:23,527 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:29:23,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2080,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:29:23,728 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:29:23,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:29:23,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1824390112, now seen corresponding path program 319 times [2021-06-05 04:29:23,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:29:23,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292453574] [2021-06-05 04:29:23,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:29:23,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:29:23,796 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:29:23,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:29:23,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292453574] [2021-06-05 04:29:23,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292453574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:23,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095236515] [2021-06-05 04:29:23,796 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:29:23,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:29:23,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:29:23,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:29:23,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:23,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:23,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:29:23,929 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:23,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:23,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:23,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:29:23,933 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:23,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:23,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:23,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:29:23,936 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:23,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:23,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:29:23,939 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:23,973 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:29:23,973 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:29:23,974 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:29:23,974 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:29:24,042 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:29:24,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095236515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:24,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:29:24,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 04:29:24,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624181825] [2021-06-05 04:29:24,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:29:24,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:29:24,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:29:24,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:29:24,043 INFO L87 Difference]: Start difference. First operand 826 states and 2293 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:24,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:29:24,342 INFO L93 Difference]: Finished difference Result 904 states and 2426 transitions. [2021-06-05 04:29:24,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:29:24,342 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:29:24,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:29:24,343 INFO L225 Difference]: With dead ends: 904 [2021-06-05 04:29:24,343 INFO L226 Difference]: Without dead ends: 900 [2021-06-05 04:29:24,343 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 332.5ms TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:29:24,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 900 states. [2021-06-05 04:29:24,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 900 to 831. [2021-06-05 04:29:24,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 2.7819277108433735) internal successors, (2309), 830 states have internal predecessors, (2309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:24,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2309 transitions. [2021-06-05 04:29:24,351 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2309 transitions. Word has length 17 [2021-06-05 04:29:24,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:29:24,351 INFO L482 AbstractCegarLoop]: Abstraction has 831 states and 2309 transitions. [2021-06-05 04:29:24,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:24,351 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2309 transitions. [2021-06-05 04:29:24,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:29:24,352 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:29:24,352 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:29:24,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2084 [2021-06-05 04:29:24,552 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:29:24,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:29:24,553 INFO L82 PathProgramCache]: Analyzing trace with hash -95342778, now seen corresponding path program 320 times [2021-06-05 04:29:24,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:29:24,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208660886] [2021-06-05 04:29:24,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:29:24,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:29:24,615 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:29:24,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:29:24,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208660886] [2021-06-05 04:29:24,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208660886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:24,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460627690] [2021-06-05 04:29:24,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:29:24,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:29:24,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:29:24,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:29:24,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:29:24,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:24,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:24,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:29:24,770 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:24,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:29:24,772 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:24,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:29:24,775 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:24,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:29:24,778 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:24,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:29:24,781 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:24,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:24,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:29:24,785 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:24,817 INFO L628 ElimStorePlain]: treesize reduction 43, result has 40.3 percent of original size [2021-06-05 04:29:24,817 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:29:24,818 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:29:24,818 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-06-05 04:29:24,848 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:29:24,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460627690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:24,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:29:24,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 04:29:24,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312621256] [2021-06-05 04:29:24,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:29:24,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:29:24,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:29:24,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:29:24,849 INFO L87 Difference]: Start difference. First operand 831 states and 2309 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:25,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:29:25,103 INFO L93 Difference]: Finished difference Result 870 states and 2366 transitions. [2021-06-05 04:29:25,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:29:25,104 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:29:25,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:29:25,105 INFO L225 Difference]: With dead ends: 870 [2021-06-05 04:29:25,105 INFO L226 Difference]: Without dead ends: 862 [2021-06-05 04:29:25,105 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 254.0ms TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:29:25,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2021-06-05 04:29:25,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 830. [2021-06-05 04:29:25,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 2.778045838359469) internal successors, (2303), 829 states have internal predecessors, (2303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:25,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2303 transitions. [2021-06-05 04:29:25,112 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2303 transitions. Word has length 17 [2021-06-05 04:29:25,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:29:25,113 INFO L482 AbstractCegarLoop]: Abstraction has 830 states and 2303 transitions. [2021-06-05 04:29:25,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:25,113 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2303 transitions. [2021-06-05 04:29:25,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:29:25,113 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:29:25,113 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:29:25,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 325 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2089 [2021-06-05 04:29:25,314 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:29:25,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:29:25,314 INFO L82 PathProgramCache]: Analyzing trace with hash 842049790, now seen corresponding path program 321 times [2021-06-05 04:29:25,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:29:25,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449951160] [2021-06-05 04:29:25,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:29:25,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:29:25,421 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:29:25,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:29:25,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449951160] [2021-06-05 04:29:25,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449951160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:25,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938817389] [2021-06-05 04:29:25,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:29:25,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:29:25,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:29:25,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:29:25,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:29:25,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:25,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:25,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:29:25,581 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:25,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:25,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:25,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:29:25,585 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:25,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:25,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:25,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:29:25,588 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:25,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:25,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:29:25,591 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:25,625 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:29:25,626 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:29:25,626 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:29:25,626 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:29:25,679 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:29:25,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938817389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:25,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:29:25,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:29:25,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982772663] [2021-06-05 04:29:25,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:29:25,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:29:25,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:29:25,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:29:25,680 INFO L87 Difference]: Start difference. First operand 830 states and 2303 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:26,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:29:26,056 INFO L93 Difference]: Finished difference Result 1009 states and 2637 transitions. [2021-06-05 04:29:26,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:29:26,056 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:29:26,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:29:26,057 INFO L225 Difference]: With dead ends: 1009 [2021-06-05 04:29:26,057 INFO L226 Difference]: Without dead ends: 1009 [2021-06-05 04:29:26,057 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 432.1ms TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:29:26,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2021-06-05 04:29:26,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 854. [2021-06-05 04:29:26,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 853 states have (on average 2.8007033997655335) internal successors, (2389), 853 states have internal predecessors, (2389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:26,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 2389 transitions. [2021-06-05 04:29:26,066 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 2389 transitions. Word has length 17 [2021-06-05 04:29:26,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:29:26,066 INFO L482 AbstractCegarLoop]: Abstraction has 854 states and 2389 transitions. [2021-06-05 04:29:26,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:26,066 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 2389 transitions. [2021-06-05 04:29:26,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:29:26,067 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:29:26,067 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:29:26,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2093 [2021-06-05 04:29:26,267 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:29:26,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:29:26,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1643666018, now seen corresponding path program 322 times [2021-06-05 04:29:26,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:29:26,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582911165] [2021-06-05 04:29:26,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:29:26,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:29:26,362 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:29:26,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:29:26,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582911165] [2021-06-05 04:29:26,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582911165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:26,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247982549] [2021-06-05 04:29:26,362 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:29:26,390 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:29:26,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:29:26,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:29:26,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:29:26,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:26,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:26,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:29:26,520 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:26,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:26,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:26,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:29:26,523 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:26,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:26,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:26,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:29:26,527 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:26,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:26,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:29:26,530 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:26,563 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:29:26,564 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:29:26,564 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:29:26,564 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:29:26,631 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:29:26,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247982549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:26,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:29:26,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:29:26,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245038037] [2021-06-05 04:29:26,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:29:26,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:29:26,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:29:26,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:29:26,632 INFO L87 Difference]: Start difference. First operand 854 states and 2389 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:27,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:29:27,591 INFO L93 Difference]: Finished difference Result 1042 states and 2727 transitions. [2021-06-05 04:29:27,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 04:29:27,591 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:29:27,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:29:27,592 INFO L225 Difference]: With dead ends: 1042 [2021-06-05 04:29:27,592 INFO L226 Difference]: Without dead ends: 1031 [2021-06-05 04:29:27,593 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 844.0ms TimeCoverageRelationStatistics Valid=205, Invalid=1517, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 04:29:27,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1031 states. [2021-06-05 04:29:27,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1031 to 876. [2021-06-05 04:29:27,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 875 states have (on average 2.8182857142857145) internal successors, (2466), 875 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:27,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 2466 transitions. [2021-06-05 04:29:27,602 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 2466 transitions. Word has length 17 [2021-06-05 04:29:27,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:29:27,602 INFO L482 AbstractCegarLoop]: Abstraction has 876 states and 2466 transitions. [2021-06-05 04:29:27,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:27,602 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 2466 transitions. [2021-06-05 04:29:27,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:29:27,603 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:29:27,603 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:29:27,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2097,327 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:29:27,804 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:29:27,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:29:27,805 INFO L82 PathProgramCache]: Analyzing trace with hash -932957572, now seen corresponding path program 323 times [2021-06-05 04:29:27,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:29:27,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482049980] [2021-06-05 04:29:27,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:29:27,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:29:27,939 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:29:27,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:29:27,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482049980] [2021-06-05 04:29:27,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482049980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:27,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037078749] [2021-06-05 04:29:27,939 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:29:27,967 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:29:27,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:29:27,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:29:27,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:29:28,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:28,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:28,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:29:28,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:28,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:28,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:28,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:29:28,097 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:28,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:28,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:28,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:29:28,100 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:28,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:28,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:29:28,103 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:28,137 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:29:28,138 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:29:28,138 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:29:28,138 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:29:28,199 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:29:28,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037078749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:28,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:29:28,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:29:28,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202641028] [2021-06-05 04:29:28,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:29:28,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:29:28,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:29:28,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:29:28,199 INFO L87 Difference]: Start difference. First operand 876 states and 2466 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:28,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:29:28,682 INFO L93 Difference]: Finished difference Result 1018 states and 2686 transitions. [2021-06-05 04:29:28,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:29:28,683 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:29:28,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:29:28,684 INFO L225 Difference]: With dead ends: 1018 [2021-06-05 04:29:28,684 INFO L226 Difference]: Without dead ends: 1018 [2021-06-05 04:29:28,684 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 492.9ms TimeCoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:29:28,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2021-06-05 04:29:28,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 876. [2021-06-05 04:29:28,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 875 states have (on average 2.8034285714285714) internal successors, (2453), 875 states have internal predecessors, (2453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:28,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 2453 transitions. [2021-06-05 04:29:28,693 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 2453 transitions. Word has length 17 [2021-06-05 04:29:28,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:29:28,693 INFO L482 AbstractCegarLoop]: Abstraction has 876 states and 2453 transitions. [2021-06-05 04:29:28,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:28,693 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 2453 transitions. [2021-06-05 04:29:28,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:29:28,694 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:29:28,694 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:29:28,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2103,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:29:28,894 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:29:28,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:29:28,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1651396416, now seen corresponding path program 324 times [2021-06-05 04:29:28,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:29:28,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916240060] [2021-06-05 04:29:28,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:29:28,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:29:28,978 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:29:28,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:29:28,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916240060] [2021-06-05 04:29:28,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916240060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:28,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560398511] [2021-06-05 04:29:28,979 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:29:29,005 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:29:29,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:29:29,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:29:29,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:29:29,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:29,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:29,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:29:29,152 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:29,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:29,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:29:29,155 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:29,173 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-06-05 04:29:29,173 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:29:29,174 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:29:29,174 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-06-05 04:29:29,199 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:29:29,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560398511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:29,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:29:29,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:29:29,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613890735] [2021-06-05 04:29:29,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:29:29,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:29:29,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:29:29,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:29:29,199 INFO L87 Difference]: Start difference. First operand 876 states and 2453 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:30,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:29:30,014 INFO L93 Difference]: Finished difference Result 1064 states and 2766 transitions. [2021-06-05 04:29:30,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 04:29:30,014 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:29:30,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:29:30,015 INFO L225 Difference]: With dead ends: 1064 [2021-06-05 04:29:30,015 INFO L226 Difference]: Without dead ends: 1064 [2021-06-05 04:29:30,016 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 728.7ms TimeCoverageRelationStatistics Valid=197, Invalid=1443, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 04:29:30,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1064 states. [2021-06-05 04:29:30,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1064 to 873. [2021-06-05 04:29:30,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 872 states have (on average 2.7924311926605503) internal successors, (2435), 872 states have internal predecessors, (2435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:30,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 2435 transitions. [2021-06-05 04:29:30,024 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 2435 transitions. Word has length 17 [2021-06-05 04:29:30,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:29:30,024 INFO L482 AbstractCegarLoop]: Abstraction has 873 states and 2435 transitions. [2021-06-05 04:29:30,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:30,024 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 2435 transitions. [2021-06-05 04:29:30,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:29:30,025 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:29:30,025 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:29:30,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2107 [2021-06-05 04:29:30,226 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:29:30,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:29:30,226 INFO L82 PathProgramCache]: Analyzing trace with hash 161991420, now seen corresponding path program 325 times [2021-06-05 04:29:30,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:29:30,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611734274] [2021-06-05 04:29:30,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:29:30,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:29:30,324 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:29:30,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:29:30,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611734274] [2021-06-05 04:29:30,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611734274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:30,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668217377] [2021-06-05 04:29:30,324 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:29:30,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:29:30,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:29:30,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:29:30,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:30,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:30,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:29:30,517 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:30,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:30,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:29:30,520 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:30,538 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-06-05 04:29:30,538 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:29:30,539 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:29:30,539 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-06-05 04:29:30,569 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:29:30,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668217377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:30,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:29:30,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:29:30,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810134766] [2021-06-05 04:29:30,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:29:30,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:29:30,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:29:30,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:29:30,570 INFO L87 Difference]: Start difference. First operand 873 states and 2435 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:31,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:29:31,593 INFO L93 Difference]: Finished difference Result 1134 states and 2895 transitions. [2021-06-05 04:29:31,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 04:29:31,594 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:29:31,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:29:31,595 INFO L225 Difference]: With dead ends: 1134 [2021-06-05 04:29:31,595 INFO L226 Difference]: Without dead ends: 1134 [2021-06-05 04:29:31,595 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 950.0ms TimeCoverageRelationStatistics Valid=289, Invalid=2063, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 04:29:31,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1134 states. [2021-06-05 04:29:31,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1134 to 865. [2021-06-05 04:29:31,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 864 states have (on average 2.792824074074074) internal successors, (2413), 864 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:31,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 2413 transitions. [2021-06-05 04:29:31,604 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 2413 transitions. Word has length 17 [2021-06-05 04:29:31,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:29:31,604 INFO L482 AbstractCegarLoop]: Abstraction has 865 states and 2413 transitions. [2021-06-05 04:29:31,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:31,604 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 2413 transitions. [2021-06-05 04:29:31,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:29:31,605 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:29:31,605 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:29:31,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2109,330 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:29:31,805 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:29:31,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:29:31,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1235076800, now seen corresponding path program 326 times [2021-06-05 04:29:31,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:29:31,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169924001] [2021-06-05 04:29:31,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:29:31,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:29:31,886 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:29:31,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:29:31,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169924001] [2021-06-05 04:29:31,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169924001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:31,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301242093] [2021-06-05 04:29:31,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:29:31,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:29:31,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:29:31,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 04:29:31,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:29:32,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:32,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:32,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:29:32,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:32,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:32,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:29:32,048 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:32,066 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-06-05 04:29:32,066 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:29:32,066 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:29:32,067 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-06-05 04:29:32,091 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:29:32,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301242093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:32,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:29:32,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 04:29:32,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731027107] [2021-06-05 04:29:32,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:29:32,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:29:32,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:29:32,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:29:32,091 INFO L87 Difference]: Start difference. First operand 865 states and 2413 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:32,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:29:32,353 INFO L93 Difference]: Finished difference Result 982 states and 2610 transitions. [2021-06-05 04:29:32,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:29:32,354 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:29:32,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:29:32,355 INFO L225 Difference]: With dead ends: 982 [2021-06-05 04:29:32,355 INFO L226 Difference]: Without dead ends: 982 [2021-06-05 04:29:32,355 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 197.7ms TimeCoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:29:32,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2021-06-05 04:29:32,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 819. [2021-06-05 04:29:32,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 818 states have (on average 2.7689486552567235) internal successors, (2265), 818 states have internal predecessors, (2265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:32,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 2265 transitions. [2021-06-05 04:29:32,363 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 2265 transitions. Word has length 17 [2021-06-05 04:29:32,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:29:32,363 INFO L482 AbstractCegarLoop]: Abstraction has 819 states and 2265 transitions. [2021-06-05 04:29:32,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:32,363 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 2265 transitions. [2021-06-05 04:29:32,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:29:32,364 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:29:32,364 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:29:32,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2111 [2021-06-05 04:29:32,565 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:29:32,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:29:32,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1502419942, now seen corresponding path program 327 times [2021-06-05 04:29:32,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:29:32,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476425414] [2021-06-05 04:29:32,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:29:32,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:29:33,169 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:29:33,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:29:33,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476425414] [2021-06-05 04:29:33,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476425414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:33,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492597824] [2021-06-05 04:29:33,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:29:33,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:29:33,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:29:33,199 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 04:29:33,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:29:34,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:34,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:34,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:34,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:34,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:34,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:34,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:34,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:34,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:34,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:34,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-05 04:29:34,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:34,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:34,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:34,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:34,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:34,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:34,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:34,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:34,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:34,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:34,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 32 [2021-06-05 04:29:34,039 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:34,085 INFO L628 ElimStorePlain]: treesize reduction 91, result has 47.4 percent of original size [2021-06-05 04:29:34,085 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:29:34,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:34,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:34,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:34,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:34,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:34,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:34,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:34,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:34,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-06-05 04:29:34,093 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:34,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:29:34,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:34,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:29:34,107 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:29:34,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:29:34,117 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:29:34,118 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:257, output treesize:22 [2021-06-05 04:29:34,157 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:29:34,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492597824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:34,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:29:34,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 04:29:34,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797122354] [2021-06-05 04:29:34,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:29:34,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:29:34,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:29:34,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=458, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:29:34,158 INFO L87 Difference]: Start difference. First operand 819 states and 2265 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:34,765 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 83 [2021-06-05 04:29:35,015 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 92 [2021-06-05 04:29:35,228 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 86 [2021-06-05 04:29:35,551 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 96 [2021-06-05 04:29:35,742 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 86 [2021-06-05 04:29:36,046 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 95 [2021-06-05 04:29:36,244 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 86 [2021-06-05 04:29:36,557 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 101 [2021-06-05 04:29:36,882 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 74 [2021-06-05 04:29:37,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:29:37,112 INFO L93 Difference]: Finished difference Result 1360 states and 3680 transitions. [2021-06-05 04:29:37,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:29:37,112 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:29:37,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:29:37,113 INFO L225 Difference]: With dead ends: 1360 [2021-06-05 04:29:37,114 INFO L226 Difference]: Without dead ends: 1354 [2021-06-05 04:29:37,114 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 3436.7ms TimeCoverageRelationStatistics Valid=156, Invalid=1176, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 04:29:37,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2021-06-05 04:29:37,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 831. [2021-06-05 04:29:37,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 2.763855421686747) internal successors, (2294), 830 states have internal predecessors, (2294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:37,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2294 transitions. [2021-06-05 04:29:37,124 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2294 transitions. Word has length 18 [2021-06-05 04:29:37,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:29:37,124 INFO L482 AbstractCegarLoop]: Abstraction has 831 states and 2294 transitions. [2021-06-05 04:29:37,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:37,124 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2294 transitions. [2021-06-05 04:29:37,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:29:37,125 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:29:37,125 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:29:37,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 332 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2113 [2021-06-05 04:29:37,325 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:29:37,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:29:37,326 INFO L82 PathProgramCache]: Analyzing trace with hash 734866218, now seen corresponding path program 328 times [2021-06-05 04:29:37,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:29:37,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777991081] [2021-06-05 04:29:37,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:29:37,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:29:37,852 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:29:37,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:29:37,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777991081] [2021-06-05 04:29:37,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777991081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:37,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642243131] [2021-06-05 04:29:37,853 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:29:37,882 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:29:37,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:29:37,883 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 04:29:37,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:29:38,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:38,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:38,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:38,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:38,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:38,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:38,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:38,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:38,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-06-05 04:29:38,527 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:38,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:38,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:38,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:38,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:38,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:38,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:38,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:38,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:38,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:38,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 40 [2021-06-05 04:29:38,542 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:38,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:38,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:38,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:38,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:38,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:38,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:38,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:38,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-06-05 04:29:38,551 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:38,563 INFO L628 ElimStorePlain]: treesize reduction 62, result has 15.1 percent of original size [2021-06-05 04:29:38,563 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:29:38,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:29:38,563 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:194, output treesize:11 [2021-06-05 04:29:38,596 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:29:38,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642243131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:38,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:29:38,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 04:29:38,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764193887] [2021-06-05 04:29:38,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:29:38,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:29:38,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:29:38,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:29:38,597 INFO L87 Difference]: Start difference. First operand 831 states and 2294 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:40,751 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 57 [2021-06-05 04:29:41,136 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 65 [2021-06-05 04:29:41,366 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 72 [2021-06-05 04:29:41,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:29:41,716 INFO L93 Difference]: Finished difference Result 1148 states and 3019 transitions. [2021-06-05 04:29:41,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 04:29:41,716 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:29:41,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:29:41,717 INFO L225 Difference]: With dead ends: 1148 [2021-06-05 04:29:41,717 INFO L226 Difference]: Without dead ends: 1139 [2021-06-05 04:29:41,718 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 3401.2ms TimeCoverageRelationStatistics Valid=221, Invalid=2229, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 04:29:41,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2021-06-05 04:29:41,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 816. [2021-06-05 04:29:41,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 816 states, 815 states have (on average 2.7607361963190185) internal successors, (2250), 815 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:41,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 2250 transitions. [2021-06-05 04:29:41,726 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 2250 transitions. Word has length 18 [2021-06-05 04:29:41,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:29:41,726 INFO L482 AbstractCegarLoop]: Abstraction has 816 states and 2250 transitions. [2021-06-05 04:29:41,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:41,726 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 2250 transitions. [2021-06-05 04:29:41,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:29:41,727 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:29:41,727 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:29:41,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2133 [2021-06-05 04:29:41,927 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:29:41,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:29:41,928 INFO L82 PathProgramCache]: Analyzing trace with hash 742596616, now seen corresponding path program 329 times [2021-06-05 04:29:41,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:29:41,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58335176] [2021-06-05 04:29:41,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:29:41,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:29:42,419 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:29:42,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:29:42,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58335176] [2021-06-05 04:29:42,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58335176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:42,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915864910] [2021-06-05 04:29:42,419 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:29:42,449 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:29:42,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:29:42,450 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 04:29:42,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:29:43,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:43,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:43,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:43,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:43,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:43,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:43,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:43,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:43,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:43,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:43,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-05 04:29:43,147 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:43,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:43,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:43,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:43,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:43,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:43,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:43,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:43,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:43,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:43,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:43,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-06-05 04:29:43,171 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:43,189 INFO L628 ElimStorePlain]: treesize reduction 110, result has 9.1 percent of original size [2021-06-05 04:29:43,190 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:29:43,190 INFO L518 ElimStorePlain]: Eliminatee v_prenex_156 vanished before elimination [2021-06-05 04:29:43,190 INFO L518 ElimStorePlain]: Eliminatee v_prenex_157 vanished before elimination [2021-06-05 04:29:43,190 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:29:43,190 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-06-05 04:29:43,235 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:29:43,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915864910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:43,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:29:43,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 04:29:43,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757055154] [2021-06-05 04:29:43,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:29:43,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:29:43,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:29:43,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:29:43,236 INFO L87 Difference]: Start difference. First operand 816 states and 2250 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:43,935 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2021-06-05 04:29:44,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:29:44,194 INFO L93 Difference]: Finished difference Result 1003 states and 2681 transitions. [2021-06-05 04:29:44,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:29:44,195 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:29:44,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:29:44,196 INFO L225 Difference]: With dead ends: 1003 [2021-06-05 04:29:44,196 INFO L226 Difference]: Without dead ends: 999 [2021-06-05 04:29:44,196 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1605.3ms TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:29:44,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2021-06-05 04:29:44,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 816. [2021-06-05 04:29:44,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 816 states, 815 states have (on average 2.7607361963190185) internal successors, (2250), 815 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:44,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 2250 transitions. [2021-06-05 04:29:44,203 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 2250 transitions. Word has length 18 [2021-06-05 04:29:44,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:29:44,203 INFO L482 AbstractCegarLoop]: Abstraction has 816 states and 2250 transitions. [2021-06-05 04:29:44,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:44,203 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 2250 transitions. [2021-06-05 04:29:44,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:29:44,204 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:29:44,204 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:29:44,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 334 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2156 [2021-06-05 04:29:44,414 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:29:44,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:29:44,414 INFO L82 PathProgramCache]: Analyzing trace with hash -746808380, now seen corresponding path program 330 times [2021-06-05 04:29:44,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:29:44,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554385375] [2021-06-05 04:29:44,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:29:44,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:29:44,795 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:29:44,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:29:44,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554385375] [2021-06-05 04:29:44,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554385375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:44,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953688878] [2021-06-05 04:29:44,795 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:29:44,824 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:29:44,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:29:44,825 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 04:29:44,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:29:45,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:45,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:45,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:45,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:45,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:45,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:45,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:45,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:45,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-06-05 04:29:45,452 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:45,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:45,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:45,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:45,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:45,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:45,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:45,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:45,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-05 04:29:45,460 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:45,472 INFO L628 ElimStorePlain]: treesize reduction 116, result has 8.7 percent of original size [2021-06-05 04:29:45,473 INFO L518 ElimStorePlain]: Eliminatee v_prenex_160 vanished before elimination [2021-06-05 04:29:45,473 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:29:45,473 INFO L518 ElimStorePlain]: Eliminatee v_prenex_159 vanished before elimination [2021-06-05 04:29:45,473 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:29:45,473 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-06-05 04:29:45,507 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:29:45,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953688878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:45,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:29:45,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 04:29:45,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301307743] [2021-06-05 04:29:45,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:29:45,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:29:45,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:29:45,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:29:45,507 INFO L87 Difference]: Start difference. First operand 816 states and 2250 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:47,183 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2021-06-05 04:29:47,395 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 80 [2021-06-05 04:29:47,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:29:47,781 INFO L93 Difference]: Finished difference Result 1084 states and 2849 transitions. [2021-06-05 04:29:47,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:29:47,782 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:29:47,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:29:47,783 INFO L225 Difference]: With dead ends: 1084 [2021-06-05 04:29:47,783 INFO L226 Difference]: Without dead ends: 1070 [2021-06-05 04:29:47,783 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 2425.5ms TimeCoverageRelationStatistics Valid=164, Invalid=1476, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 04:29:47,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1070 states. [2021-06-05 04:29:47,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1070 to 832. [2021-06-05 04:29:47,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 831 states have (on average 2.766546329723225) internal successors, (2299), 831 states have internal predecessors, (2299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:47,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 2299 transitions. [2021-06-05 04:29:47,791 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 2299 transitions. Word has length 18 [2021-06-05 04:29:47,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:29:47,792 INFO L482 AbstractCegarLoop]: Abstraction has 832 states and 2299 transitions. [2021-06-05 04:29:47,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:47,792 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 2299 transitions. [2021-06-05 04:29:47,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:29:47,793 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:29:47,793 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:29:47,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2174,335 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:29:47,993 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:29:47,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:29:47,993 INFO L82 PathProgramCache]: Analyzing trace with hash 326277000, now seen corresponding path program 331 times [2021-06-05 04:29:47,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:29:47,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324921974] [2021-06-05 04:29:47,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:29:47,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:29:48,643 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:29:48,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:29:48,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324921974] [2021-06-05 04:29:48,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324921974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:48,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295255832] [2021-06-05 04:29:48,643 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:29:48,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:29:48,673 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 04:29:48,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:29:49,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:49,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:49,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:49,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:49,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:49,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:49,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:49,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:49,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:49,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-06-05 04:29:49,353 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:49,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:49,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:49,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:49,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:49,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:49,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:49,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:49,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:49,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-05 04:29:49,362 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:49,375 INFO L628 ElimStorePlain]: treesize reduction 116, result has 8.7 percent of original size [2021-06-05 04:29:49,375 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:29:49,375 INFO L518 ElimStorePlain]: Eliminatee v_prenex_166 vanished before elimination [2021-06-05 04:29:49,375 INFO L518 ElimStorePlain]: Eliminatee v_prenex_167 vanished before elimination [2021-06-05 04:29:49,376 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:29:49,376 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-06-05 04:29:49,412 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:29:49,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295255832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:49,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:29:49,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 04:29:49,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914320717] [2021-06-05 04:29:49,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:29:49,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:29:49,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:29:49,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=458, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:29:49,413 INFO L87 Difference]: Start difference. First operand 832 states and 2299 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:49,897 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2021-06-05 04:29:50,149 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2021-06-05 04:29:50,407 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2021-06-05 04:29:50,549 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2021-06-05 04:29:50,778 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 98 [2021-06-05 04:29:51,153 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 95 [2021-06-05 04:29:51,844 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2021-06-05 04:29:51,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:29:51,862 INFO L93 Difference]: Finished difference Result 1046 states and 2780 transitions. [2021-06-05 04:29:51,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:29:51,863 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:29:51,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:29:51,864 INFO L225 Difference]: With dead ends: 1046 [2021-06-05 04:29:51,864 INFO L226 Difference]: Without dead ends: 1038 [2021-06-05 04:29:51,864 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 2948.1ms TimeCoverageRelationStatistics Valid=132, Invalid=1350, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 04:29:51,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2021-06-05 04:29:51,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 836. [2021-06-05 04:29:51,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 836 states, 835 states have (on average 2.7676646706586827) internal successors, (2311), 835 states have internal predecessors, (2311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:51,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 2311 transitions. [2021-06-05 04:29:51,872 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 2311 transitions. Word has length 18 [2021-06-05 04:29:51,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:29:51,872 INFO L482 AbstractCegarLoop]: Abstraction has 836 states and 2311 transitions. [2021-06-05 04:29:51,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:51,872 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 2311 transitions. [2021-06-05 04:29:51,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:29:51,873 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:29:51,873 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:29:52,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2194,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:29:52,073 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:29:52,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:29:52,074 INFO L82 PathProgramCache]: Analyzing trace with hash -767814588, now seen corresponding path program 332 times [2021-06-05 04:29:52,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:29:52,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023740048] [2021-06-05 04:29:52,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:29:52,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:29:52,681 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:29:52,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:29:52,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023740048] [2021-06-05 04:29:52,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023740048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:52,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120550516] [2021-06-05 04:29:52,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:29:52,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:29:52,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:29:52,711 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 04:29:52,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:29:53,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:53,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:53,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:53,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:53,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:53,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:53,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:53,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:53,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:53,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:53,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 48 [2021-06-05 04:29:53,340 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:53,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:53,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:53,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:53,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:53,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:53,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:53,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:53,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:53,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:53,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:53,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 32 [2021-06-05 04:29:53,356 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:53,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:53,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:53,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:53,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:53,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:53,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:53,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:53,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:53,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:53,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:53,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-05 04:29:53,375 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:53,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:53,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:53,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:53,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:53,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:53,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:53,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:53,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:53,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:53,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-05 04:29:53,389 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:53,447 INFO L628 ElimStorePlain]: treesize reduction 99, result has 40.4 percent of original size [2021-06-05 04:29:53,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:53,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:29:53,451 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:29:53,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:29:53,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:29:53,476 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:333, output treesize:62 [2021-06-05 04:29:53,569 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:29:53,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120550516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:53,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:29:53,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 04:29:53,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920375781] [2021-06-05 04:29:53,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:29:53,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:29:53,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:29:53,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:29:53,570 INFO L87 Difference]: Start difference. First operand 836 states and 2311 transitions. Second operand has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:54,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:29:54,216 INFO L93 Difference]: Finished difference Result 1077 states and 2845 transitions. [2021-06-05 04:29:54,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:29:54,216 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:29:54,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:29:54,217 INFO L225 Difference]: With dead ends: 1077 [2021-06-05 04:29:54,217 INFO L226 Difference]: Without dead ends: 1071 [2021-06-05 04:29:54,218 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1408.8ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:29:54,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1071 states. [2021-06-05 04:29:54,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1071 to 856. [2021-06-05 04:29:54,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 855 states have (on average 2.76140350877193) internal successors, (2361), 855 states have internal predecessors, (2361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:54,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 2361 transitions. [2021-06-05 04:29:54,226 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 2361 transitions. Word has length 18 [2021-06-05 04:29:54,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:29:54,226 INFO L482 AbstractCegarLoop]: Abstraction has 856 states and 2361 transitions. [2021-06-05 04:29:54,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:54,226 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 2361 transitions. [2021-06-05 04:29:54,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:29:54,232 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:29:54,232 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:29:54,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2212 [2021-06-05 04:29:54,432 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:29:54,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:29:54,433 INFO L82 PathProgramCache]: Analyzing trace with hash -349154778, now seen corresponding path program 333 times [2021-06-05 04:29:54,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:29:54,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459760582] [2021-06-05 04:29:54,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:29:54,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:29:54,912 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:29:54,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:29:54,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459760582] [2021-06-05 04:29:54,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459760582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:54,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851008596] [2021-06-05 04:29:54,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:29:54,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:29:54,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:29:54,943 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 04:29:54,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:29:55,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:55,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:55,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:55,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:55,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:55,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:55,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 36 [2021-06-05 04:29:55,490 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:55,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:55,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:55,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:55,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:55,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:55,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:55,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:55,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 36 [2021-06-05 04:29:55,503 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:55,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:55,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:55,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:55,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:55,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:55,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:55,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:55,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 44 [2021-06-05 04:29:55,516 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:55,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:55,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:55,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:55,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:55,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:55,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2021-06-05 04:29:55,525 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:55,585 INFO L628 ElimStorePlain]: treesize reduction 93, result has 44.0 percent of original size [2021-06-05 04:29:55,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:55,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 04:29:55,588 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:55,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:29:55,613 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:29:55,613 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:301, output treesize:62 [2021-06-05 04:29:55,711 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:29:55,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851008596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:55,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:29:55,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 04:29:55,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855508037] [2021-06-05 04:29:55,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:29:55,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:29:55,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:29:55,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:29:55,712 INFO L87 Difference]: Start difference. First operand 856 states and 2361 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:56,277 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2021-06-05 04:29:56,559 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 69 [2021-06-05 04:29:56,985 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 74 [2021-06-05 04:29:57,423 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 75 [2021-06-05 04:29:57,813 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 79 [2021-06-05 04:29:58,129 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2021-06-05 04:29:58,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:29:58,273 INFO L93 Difference]: Finished difference Result 1046 states and 2755 transitions. [2021-06-05 04:29:58,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 04:29:58,273 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:29:58,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:29:58,274 INFO L225 Difference]: With dead ends: 1046 [2021-06-05 04:29:58,274 INFO L226 Difference]: Without dead ends: 1034 [2021-06-05 04:29:58,274 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 2984.3ms TimeCoverageRelationStatistics Valid=202, Invalid=1604, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 04:29:58,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2021-06-05 04:29:58,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 882. [2021-06-05 04:29:58,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 881 states have (on average 2.7763904653802496) internal successors, (2446), 881 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:58,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 2446 transitions. [2021-06-05 04:29:58,283 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 2446 transitions. Word has length 18 [2021-06-05 04:29:58,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:29:58,283 INFO L482 AbstractCegarLoop]: Abstraction has 882 states and 2446 transitions. [2021-06-05 04:29:58,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:29:58,283 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 2446 transitions. [2021-06-05 04:29:58,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:29:58,284 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:29:58,284 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:29:58,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2222 [2021-06-05 04:29:58,485 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:29:58,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:29:58,485 INFO L82 PathProgramCache]: Analyzing trace with hash -101782042, now seen corresponding path program 334 times [2021-06-05 04:29:58,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:29:58,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403252119] [2021-06-05 04:29:58,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:29:58,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:29:58,657 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:29:58,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:29:58,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403252119] [2021-06-05 04:29:58,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403252119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:58,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067562415] [2021-06-05 04:29:58,657 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:29:58,685 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:29:58,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:29:58,686 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 04:29:58,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:29:59,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:59,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:59,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:59,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:59,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:59,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:29:59,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:29:59,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-06-05 04:29:59,368 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:29:59,386 INFO L628 ElimStorePlain]: treesize reduction 143, result has 7.1 percent of original size [2021-06-05 04:29:59,386 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-05 04:29:59,386 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:29:59,387 INFO L518 ElimStorePlain]: Eliminatee v_prenex_169 vanished before elimination [2021-06-05 04:29:59,387 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:29:59,387 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:194, output treesize:11 [2021-06-05 04:29:59,415 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:29:59,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067562415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:29:59,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:29:59,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-06-05 04:29:59,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463471549] [2021-06-05 04:29:59,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:29:59,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:29:59,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:29:59,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:29:59,416 INFO L87 Difference]: Start difference. First operand 882 states and 2446 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:30:00,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:30:00,695 INFO L93 Difference]: Finished difference Result 1043 states and 2788 transitions. [2021-06-05 04:30:00,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:30:00,695 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:30:00,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:30:00,696 INFO L225 Difference]: With dead ends: 1043 [2021-06-05 04:30:00,696 INFO L226 Difference]: Without dead ends: 1039 [2021-06-05 04:30:00,697 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1623.5ms TimeCoverageRelationStatistics Valid=154, Invalid=1106, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 04:30:00,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2021-06-05 04:30:00,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 917. [2021-06-05 04:30:00,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 916 states have (on average 2.7903930131004366) internal successors, (2556), 916 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:30:00,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 2556 transitions. [2021-06-05 04:30:00,706 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 2556 transitions. Word has length 18 [2021-06-05 04:30:00,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:30:00,706 INFO L482 AbstractCegarLoop]: Abstraction has 917 states and 2556 transitions. [2021-06-05 04:30:00,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:30:00,706 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 2556 transitions. [2021-06-05 04:30:00,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:30:00,707 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:30:00,707 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:30:00,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2233 [2021-06-05 04:30:00,907 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:30:00,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:30:00,907 INFO L82 PathProgramCache]: Analyzing trace with hash -518101658, now seen corresponding path program 335 times [2021-06-05 04:30:00,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:30:00,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90648742] [2021-06-05 04:30:00,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:30:00,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:30:01,222 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:30:01,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:30:01,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90648742] [2021-06-05 04:30:01,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90648742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:30:01,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173459305] [2021-06-05 04:30:01,223 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:30:01,252 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:30:01,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:30:01,253 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 04:30:01,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:30:01,630 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-06-05 04:30:01,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:01,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:01,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:01,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:01,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:01,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:01,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:01,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:01,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:01,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:01,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-06-05 04:30:01,985 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:30:01,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:01,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:01,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:01,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:01,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:01,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:01,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:01,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:01,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:01,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-05 04:30:01,995 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:30:02,040 INFO L628 ElimStorePlain]: treesize reduction 91, result has 45.8 percent of original size [2021-06-05 04:30:02,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:02,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:02,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:02,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:02,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:02,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:02,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 27 [2021-06-05 04:30:02,049 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:30:02,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:30:02,059 INFO L518 ElimStorePlain]: Eliminatee v_prenex_173 vanished before elimination [2021-06-05 04:30:02,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:02,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:30:02,062 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:30:02,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:30:02,073 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:30:02,074 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:257, output treesize:22 [2021-06-05 04:30:02,112 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:30:02,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173459305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:30:02,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:30:02,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-06-05 04:30:02,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092968074] [2021-06-05 04:30:02,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:30:02,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:30:02,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:30:02,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:30:02,113 INFO L87 Difference]: Start difference. First operand 917 states and 2556 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:30:03,743 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2021-06-05 04:30:03,912 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 82 [2021-06-05 04:30:04,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:30:04,050 INFO L93 Difference]: Finished difference Result 1092 states and 2931 transitions. [2021-06-05 04:30:04,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:30:04,050 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:30:04,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:30:04,052 INFO L225 Difference]: With dead ends: 1092 [2021-06-05 04:30:04,052 INFO L226 Difference]: Without dead ends: 1072 [2021-06-05 04:30:04,052 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 2296.0ms TimeCoverageRelationStatistics Valid=144, Invalid=1116, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 04:30:04,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2021-06-05 04:30:04,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 946. [2021-06-05 04:30:04,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 946 states, 945 states have (on average 2.785185185185185) internal successors, (2632), 945 states have internal predecessors, (2632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:30:04,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 946 states to 946 states and 2632 transitions. [2021-06-05 04:30:04,061 INFO L78 Accepts]: Start accepts. Automaton has 946 states and 2632 transitions. Word has length 18 [2021-06-05 04:30:04,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:30:04,061 INFO L482 AbstractCegarLoop]: Abstraction has 946 states and 2632 transitions. [2021-06-05 04:30:04,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:30:04,061 INFO L276 IsEmpty]: Start isEmpty. Operand 946 states and 2632 transitions. [2021-06-05 04:30:04,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:30:04,062 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:30:04,062 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:30:04,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2252,340 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:30:04,263 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:30:04,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:30:04,263 INFO L82 PathProgramCache]: Analyzing trace with hash -539107866, now seen corresponding path program 336 times [2021-06-05 04:30:04,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:30:04,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887183215] [2021-06-05 04:30:04,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:30:04,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:30:04,669 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:30:04,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:30:04,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887183215] [2021-06-05 04:30:04,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887183215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:30:04,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254560217] [2021-06-05 04:30:04,670 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:30:04,703 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:30:04,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:30:04,704 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 04:30:04,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:30:05,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:05,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:05,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:05,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:05,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:05,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:05,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:05,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-05 04:30:05,398 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:30:05,417 INFO L628 ElimStorePlain]: treesize reduction 151, result has 6.8 percent of original size [2021-06-05 04:30:05,418 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:30:05,418 INFO L518 ElimStorePlain]: Eliminatee v_prenex_177 vanished before elimination [2021-06-05 04:30:05,418 INFO L518 ElimStorePlain]: Eliminatee v_prenex_178 vanished before elimination [2021-06-05 04:30:05,418 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:30:05,418 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-06-05 04:30:05,453 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:30:05,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254560217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:30:05,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:30:05,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 04:30:05,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409339173] [2021-06-05 04:30:05,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:30:05,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:30:05,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:30:05,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=416, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:30:05,454 INFO L87 Difference]: Start difference. First operand 946 states and 2632 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:30:06,632 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2021-06-05 04:30:06,861 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 84 [2021-06-05 04:30:07,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:30:07,181 INFO L93 Difference]: Finished difference Result 1041 states and 2835 transitions. [2021-06-05 04:30:07,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:30:07,181 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:30:07,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:30:07,182 INFO L225 Difference]: With dead ends: 1041 [2021-06-05 04:30:07,182 INFO L226 Difference]: Without dead ends: 1037 [2021-06-05 04:30:07,182 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 2055.7ms TimeCoverageRelationStatistics Valid=127, Invalid=1133, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 04:30:07,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2021-06-05 04:30:07,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 946. [2021-06-05 04:30:07,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 946 states, 945 states have (on average 2.785185185185185) internal successors, (2632), 945 states have internal predecessors, (2632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:30:07,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 946 states to 946 states and 2632 transitions. [2021-06-05 04:30:07,192 INFO L78 Accepts]: Start accepts. Automaton has 946 states and 2632 transitions. Word has length 18 [2021-06-05 04:30:07,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:30:07,192 INFO L482 AbstractCegarLoop]: Abstraction has 946 states and 2632 transitions. [2021-06-05 04:30:07,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:30:07,192 INFO L276 IsEmpty]: Start isEmpty. Operand 946 states and 2632 transitions. [2021-06-05 04:30:07,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:30:07,193 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:30:07,193 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:30:07,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2273,341 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:30:07,393 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:30:07,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:30:07,394 INFO L82 PathProgramCache]: Analyzing trace with hash 312380492, now seen corresponding path program 337 times [2021-06-05 04:30:07,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:30:07,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863386336] [2021-06-05 04:30:07,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:30:07,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:30:07,885 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:30:07,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:30:07,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863386336] [2021-06-05 04:30:07,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863386336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:30:07,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536606047] [2021-06-05 04:30:07,886 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:30:07,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:30:07,916 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 04:30:07,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:30:08,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:08,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:08,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:08,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:08,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:08,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:08,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:08,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:08,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-06-05 04:30:08,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:30:08,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:08,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:08,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:08,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:08,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:08,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:08,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:08,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:08,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:08,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 40 [2021-06-05 04:30:08,578 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:30:08,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:08,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:08,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:08,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:08,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:08,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:08,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:08,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-06-05 04:30:08,586 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:30:08,598 INFO L628 ElimStorePlain]: treesize reduction 62, result has 15.1 percent of original size [2021-06-05 04:30:08,599 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:30:08,599 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:30:08,599 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:194, output treesize:11 [2021-06-05 04:30:08,632 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:30:08,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536606047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:30:08,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:30:08,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 04:30:08,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911897502] [2021-06-05 04:30:08,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:30:08,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:30:08,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:30:08,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:30:08,633 INFO L87 Difference]: Start difference. First operand 946 states and 2632 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:30:10,407 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 63 [2021-06-05 04:30:10,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:30:10,886 INFO L93 Difference]: Finished difference Result 1121 states and 2991 transitions. [2021-06-05 04:30:10,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 04:30:10,886 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:30:10,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:30:10,887 INFO L225 Difference]: With dead ends: 1121 [2021-06-05 04:30:10,887 INFO L226 Difference]: Without dead ends: 1115 [2021-06-05 04:30:10,887 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 2524.2ms TimeCoverageRelationStatistics Valid=165, Invalid=1557, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 04:30:10,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1115 states. [2021-06-05 04:30:10,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1115 to 963. [2021-06-05 04:30:10,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 2.7972972972972974) internal successors, (2691), 962 states have internal predecessors, (2691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:30:10,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 2691 transitions. [2021-06-05 04:30:10,897 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 2691 transitions. Word has length 18 [2021-06-05 04:30:10,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:30:10,897 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 2691 transitions. [2021-06-05 04:30:10,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:30:10,897 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 2691 transitions. [2021-06-05 04:30:10,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:30:10,898 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:30:10,898 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:30:11,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2292,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:30:11,098 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:30:11,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:30:11,099 INFO L82 PathProgramCache]: Analyzing trace with hash 320110890, now seen corresponding path program 338 times [2021-06-05 04:30:11,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:30:11,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450638283] [2021-06-05 04:30:11,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:30:11,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:30:11,583 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:30:11,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:30:11,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450638283] [2021-06-05 04:30:11,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450638283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:30:11,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198106300] [2021-06-05 04:30:11,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:30:11,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:30:11,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:30:11,613 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 04:30:11,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:30:12,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:12,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:12,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:12,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:12,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:12,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:12,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:12,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:12,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:12,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:12,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 48 [2021-06-05 04:30:12,205 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:30:12,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:12,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:12,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:12,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:12,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:12,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:12,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:12,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:12,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:12,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:12,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 32 [2021-06-05 04:30:12,220 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:30:12,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:12,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:12,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:12,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:12,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:12,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:12,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:12,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:12,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:12,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:12,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-05 04:30:12,237 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:30:12,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:12,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:12,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:12,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:12,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:12,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:12,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:12,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:12,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:12,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-05 04:30:12,247 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:30:12,306 INFO L628 ElimStorePlain]: treesize reduction 97, result has 42.9 percent of original size [2021-06-05 04:30:12,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:12,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 04:30:12,310 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:30:12,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:30:12,334 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:30:12,334 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:333, output treesize:62 [2021-06-05 04:30:12,434 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:30:12,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198106300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:30:12,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:30:12,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 04:30:12,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067348643] [2021-06-05 04:30:12,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:30:12,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:30:12,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:30:12,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:30:12,435 INFO L87 Difference]: Start difference. First operand 963 states and 2691 transitions. Second operand has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:30:13,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:30:13,877 INFO L93 Difference]: Finished difference Result 1135 states and 3035 transitions. [2021-06-05 04:30:13,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 04:30:13,878 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:30:13,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:30:13,879 INFO L225 Difference]: With dead ends: 1135 [2021-06-05 04:30:13,879 INFO L226 Difference]: Without dead ends: 1123 [2021-06-05 04:30:13,879 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 2046.2ms TimeCoverageRelationStatistics Valid=161, Invalid=1171, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 04:30:13,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2021-06-05 04:30:13,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 974. [2021-06-05 04:30:13,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 974 states, 973 states have (on average 2.8098663926002057) internal successors, (2734), 973 states have internal predecessors, (2734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:30:13,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 2734 transitions. [2021-06-05 04:30:13,894 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 2734 transitions. Word has length 18 [2021-06-05 04:30:13,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:30:13,894 INFO L482 AbstractCegarLoop]: Abstraction has 974 states and 2734 transitions. [2021-06-05 04:30:13,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:30:13,894 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 2734 transitions. [2021-06-05 04:30:13,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:30:13,895 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:30:13,895 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:30:14,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2314 [2021-06-05 04:30:14,095 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:30:14,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:30:14,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1169294106, now seen corresponding path program 339 times [2021-06-05 04:30:14,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:30:14,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982136786] [2021-06-05 04:30:14,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:30:14,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:30:14,658 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:30:14,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:30:14,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982136786] [2021-06-05 04:30:14,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982136786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:30:14,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098992880] [2021-06-05 04:30:14,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:30:14,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:30:14,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:30:14,689 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 04:30:14,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:30:15,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:15,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:15,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:15,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:15,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:15,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:15,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:15,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:15,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:15,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:15,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 48 [2021-06-05 04:30:15,279 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:30:15,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:15,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:15,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:15,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:15,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:15,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:15,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:15,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:15,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:15,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:15,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 32 [2021-06-05 04:30:15,295 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:30:15,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:15,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:15,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:15,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:15,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:15,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:15,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:15,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:15,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:15,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:15,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-05 04:30:15,311 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:30:15,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:15,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:15,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:15,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:15,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:15,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:15,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:15,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:15,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:15,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-05 04:30:15,321 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:30:15,381 INFO L628 ElimStorePlain]: treesize reduction 89, result has 45.1 percent of original size [2021-06-05 04:30:15,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:15,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 04:30:15,384 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:30:15,408 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:30:15,409 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:30:15,409 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:333, output treesize:62 [2021-06-05 04:30:15,514 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:30:15,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098992880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:30:15,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:30:15,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 04:30:15,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414528596] [2021-06-05 04:30:15,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:30:15,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:30:15,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:30:15,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:30:15,515 INFO L87 Difference]: Start difference. First operand 974 states and 2734 transitions. Second operand has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:30:16,970 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 35 [2021-06-05 04:30:17,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:30:17,170 INFO L93 Difference]: Finished difference Result 1092 states and 2973 transitions. [2021-06-05 04:30:17,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:30:17,170 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:30:17,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:30:17,171 INFO L225 Difference]: With dead ends: 1092 [2021-06-05 04:30:17,171 INFO L226 Difference]: Without dead ends: 1084 [2021-06-05 04:30:17,172 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 2204.0ms TimeCoverageRelationStatistics Valid=147, Invalid=1185, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 04:30:17,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1084 states. [2021-06-05 04:30:17,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1084 to 977. [2021-06-05 04:30:17,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 977 states, 976 states have (on average 2.810450819672131) internal successors, (2743), 976 states have internal predecessors, (2743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:30:17,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 977 states to 977 states and 2743 transitions. [2021-06-05 04:30:17,180 INFO L78 Accepts]: Start accepts. Automaton has 977 states and 2743 transitions. Word has length 18 [2021-06-05 04:30:17,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:30:17,180 INFO L482 AbstractCegarLoop]: Abstraction has 977 states and 2743 transitions. [2021-06-05 04:30:17,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:30:17,181 INFO L276 IsEmpty]: Start isEmpty. Operand 977 states and 2743 transitions. [2021-06-05 04:30:17,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:30:17,181 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:30:17,181 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:30:17,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2325,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:30:17,382 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:30:17,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:30:17,382 INFO L82 PathProgramCache]: Analyzing trace with hash -96208726, now seen corresponding path program 340 times [2021-06-05 04:30:17,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:30:17,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487575284] [2021-06-05 04:30:17,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:30:17,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:30:18,002 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:30:18,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:30:18,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487575284] [2021-06-05 04:30:18,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487575284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:30:18,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490790534] [2021-06-05 04:30:18,003 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:30:18,032 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:30:18,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:30:18,033 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 04:30:18,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:30:18,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:18,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:18,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:18,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:18,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:18,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:18,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:18,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:18,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:18,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:18,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-05 04:30:18,804 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:30:18,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:18,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:18,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:18,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:18,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:18,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:18,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:18,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:18,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:18,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-06-05 04:30:18,815 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:30:18,828 INFO L628 ElimStorePlain]: treesize reduction 112, result has 8.9 percent of original size [2021-06-05 04:30:18,828 INFO L518 ElimStorePlain]: Eliminatee v_prenex_182 vanished before elimination [2021-06-05 04:30:18,828 INFO L518 ElimStorePlain]: Eliminatee v_prenex_183 vanished before elimination [2021-06-05 04:30:18,828 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:30:18,828 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:30:18,829 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-06-05 04:30:18,864 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:30:18,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490790534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:30:18,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:30:18,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 04:30:18,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215570594] [2021-06-05 04:30:18,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:30:18,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:30:18,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:30:18,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=459, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:30:18,865 INFO L87 Difference]: Start difference. First operand 977 states and 2743 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:30:19,525 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2021-06-05 04:30:19,803 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 86 [2021-06-05 04:30:20,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:30:20,285 INFO L93 Difference]: Finished difference Result 1061 states and 2921 transitions. [2021-06-05 04:30:20,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:30:20,285 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:30:20,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:30:20,286 INFO L225 Difference]: With dead ends: 1061 [2021-06-05 04:30:20,286 INFO L226 Difference]: Without dead ends: 1057 [2021-06-05 04:30:20,287 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 2129.9ms TimeCoverageRelationStatistics Valid=103, Invalid=953, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:30:20,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2021-06-05 04:30:20,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 980. [2021-06-05 04:30:20,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 980 states, 979 states have (on average 2.8110316649642493) internal successors, (2752), 979 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:30:20,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 980 states to 980 states and 2752 transitions. [2021-06-05 04:30:20,295 INFO L78 Accepts]: Start accepts. Automaton has 980 states and 2752 transitions. Word has length 18 [2021-06-05 04:30:20,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:30:20,295 INFO L482 AbstractCegarLoop]: Abstraction has 980 states and 2752 transitions. [2021-06-05 04:30:20,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:30:20,295 INFO L276 IsEmpty]: Start isEmpty. Operand 980 states and 2752 transitions. [2021-06-05 04:30:20,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:30:20,296 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:30:20,296 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:30:20,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2336 [2021-06-05 04:30:20,497 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:30:20,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:30:20,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1190300314, now seen corresponding path program 341 times [2021-06-05 04:30:20,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:30:20,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398573014] [2021-06-05 04:30:20,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:30:20,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:30:20,755 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:30:20,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:30:20,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398573014] [2021-06-05 04:30:20,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398573014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:30:20,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106899867] [2021-06-05 04:30:20,755 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:30:20,786 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:30:20,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:30:20,786 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 04:30:20,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:30:21,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:21,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:21,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:21,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:21,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:21,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:21,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:21,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:21,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:21,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:21,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-06-05 04:30:21,432 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:30:21,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:21,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:21,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:21,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:21,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:21,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:21,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:21,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:21,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:21,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-05 04:30:21,442 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:30:21,455 INFO L628 ElimStorePlain]: treesize reduction 106, result has 9.4 percent of original size [2021-06-05 04:30:21,455 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:30:21,455 INFO L518 ElimStorePlain]: Eliminatee v_prenex_187 vanished before elimination [2021-06-05 04:30:21,455 INFO L518 ElimStorePlain]: Eliminatee v_prenex_188 vanished before elimination [2021-06-05 04:30:21,456 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:30:21,456 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-06-05 04:30:21,488 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:30:21,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106899867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:30:21,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:30:21,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 04:30:21,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796087049] [2021-06-05 04:30:21,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:30:21,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:30:21,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:30:21,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:30:21,489 INFO L87 Difference]: Start difference. First operand 980 states and 2752 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:30:22,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:30:22,983 INFO L93 Difference]: Finished difference Result 1109 states and 3024 transitions. [2021-06-05 04:30:22,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:30:22,984 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:30:22,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:30:22,985 INFO L225 Difference]: With dead ends: 1109 [2021-06-05 04:30:22,985 INFO L226 Difference]: Without dead ends: 1105 [2021-06-05 04:30:22,985 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1648.7ms TimeCoverageRelationStatistics Valid=127, Invalid=1133, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 04:30:22,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1105 states. [2021-06-05 04:30:22,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1105 to 987. [2021-06-05 04:30:22,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 987 states, 986 states have (on average 2.814401622718053) internal successors, (2775), 986 states have internal predecessors, (2775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:30:22,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 987 states to 987 states and 2775 transitions. [2021-06-05 04:30:22,994 INFO L78 Accepts]: Start accepts. Automaton has 987 states and 2775 transitions. Word has length 18 [2021-06-05 04:30:22,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:30:22,994 INFO L482 AbstractCegarLoop]: Abstraction has 987 states and 2775 transitions. [2021-06-05 04:30:22,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:30:22,994 INFO L276 IsEmpty]: Start isEmpty. Operand 987 states and 2775 transitions. [2021-06-05 04:30:22,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:30:22,995 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:30:22,995 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:30:23,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 346 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2354 [2021-06-05 04:30:23,196 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:30:23,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:30:23,196 INFO L82 PathProgramCache]: Analyzing trace with hash 405932714, now seen corresponding path program 342 times [2021-06-05 04:30:23,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:30:23,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575511240] [2021-06-05 04:30:23,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:30:23,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:30:23,748 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:30:23,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:30:23,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575511240] [2021-06-05 04:30:23,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575511240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:30:23,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642200816] [2021-06-05 04:30:23,748 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:30:23,778 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:30:23,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:30:23,779 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 04:30:23,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:30:24,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:24,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:24,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:24,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-06-05 04:30:24,425 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:30:24,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:24,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:24,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-06-05 04:30:24,434 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:30:24,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:24,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:24,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:24,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 36 [2021-06-05 04:30:24,444 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:30:24,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:24,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 04:30:24,448 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:30:24,464 INFO L628 ElimStorePlain]: treesize reduction 73, result has 17.0 percent of original size [2021-06-05 04:30:24,464 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:30:24,465 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:30:24,465 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:209, output treesize:11 [2021-06-05 04:30:24,500 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:30:24,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642200816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:30:24,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:30:24,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 04:30:24,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283193612] [2021-06-05 04:30:24,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:30:24,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:30:24,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:30:24,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=458, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:30:24,501 INFO L87 Difference]: Start difference. First operand 987 states and 2775 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:30:25,879 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 63 [2021-06-05 04:30:26,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:30:26,402 INFO L93 Difference]: Finished difference Result 1066 states and 2915 transitions. [2021-06-05 04:30:26,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 04:30:26,402 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:30:26,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:30:26,404 INFO L225 Difference]: With dead ends: 1066 [2021-06-05 04:30:26,404 INFO L226 Difference]: Without dead ends: 1053 [2021-06-05 04:30:26,404 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 2416.3ms TimeCoverageRelationStatistics Valid=150, Invalid=1490, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 04:30:26,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1053 states. [2021-06-05 04:30:26,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1053 to 1013. [2021-06-05 04:30:26,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 1012 states have (on average 2.8033596837944663) internal successors, (2837), 1012 states have internal predecessors, (2837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:30:26,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 2837 transitions. [2021-06-05 04:30:26,413 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 2837 transitions. Word has length 18 [2021-06-05 04:30:26,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:30:26,413 INFO L482 AbstractCegarLoop]: Abstraction has 1013 states and 2837 transitions. [2021-06-05 04:30:26,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:30:26,413 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 2837 transitions. [2021-06-05 04:30:26,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:30:26,414 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:30:26,414 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:30:26,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2373,347 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:30:26,615 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:30:26,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:30:26,615 INFO L82 PathProgramCache]: Analyzing trace with hash 973957934, now seen corresponding path program 343 times [2021-06-05 04:30:26,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:30:26,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006235310] [2021-06-05 04:30:26,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:30:26,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:30:26,911 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:30:26,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:30:26,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006235310] [2021-06-05 04:30:26,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006235310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:30:26,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684360919] [2021-06-05 04:30:26,911 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:30:26,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:30:26,941 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 04:30:26,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:30:27,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:27,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:27,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 36 [2021-06-05 04:30:27,554 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:30:27,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:27,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:27,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:27,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-06-05 04:30:27,563 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:30:27,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:27,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-06-05 04:30:27,567 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:30:27,580 INFO L628 ElimStorePlain]: treesize reduction 66, result has 14.3 percent of original size [2021-06-05 04:30:27,580 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:30:27,580 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:30:27,580 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:170, output treesize:11 [2021-06-05 04:30:27,609 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:30:27,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684360919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:30:27,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:30:27,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 04:30:27,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805892517] [2021-06-05 04:30:27,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:30:27,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:30:27,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:30:27,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:30:27,610 INFO L87 Difference]: Start difference. First operand 1013 states and 2837 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:30:29,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:30:29,228 INFO L93 Difference]: Finished difference Result 1087 states and 2996 transitions. [2021-06-05 04:30:29,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:30:29,228 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:30:29,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:30:29,229 INFO L225 Difference]: With dead ends: 1087 [2021-06-05 04:30:29,229 INFO L226 Difference]: Without dead ends: 1078 [2021-06-05 04:30:29,230 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 2020.5ms TimeCoverageRelationStatistics Valid=159, Invalid=1173, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 04:30:29,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-06-05 04:30:29,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 1020. [2021-06-05 04:30:29,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1020 states, 1019 states have (on average 2.8115799803729145) internal successors, (2865), 1019 states have internal predecessors, (2865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:30:29,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1020 states to 1020 states and 2865 transitions. [2021-06-05 04:30:29,239 INFO L78 Accepts]: Start accepts. Automaton has 1020 states and 2865 transitions. Word has length 18 [2021-06-05 04:30:29,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:30:29,239 INFO L482 AbstractCegarLoop]: Abstraction has 1020 states and 2865 transitions. [2021-06-05 04:30:29,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:30:29,239 INFO L276 IsEmpty]: Start isEmpty. Operand 1020 states and 2865 transitions. [2021-06-05 04:30:29,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:30:29,240 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:30:29,240 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:30:29,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2406,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:30:29,441 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:30:29,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:30:29,441 INFO L82 PathProgramCache]: Analyzing trace with hash -507716664, now seen corresponding path program 344 times [2021-06-05 04:30:29,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:30:29,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947241148] [2021-06-05 04:30:29,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:30:29,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:30:29,610 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:30:29,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:30:29,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947241148] [2021-06-05 04:30:29,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947241148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:30:29,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545269928] [2021-06-05 04:30:29,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:30:29,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:30:29,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:30:29,640 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 04:30:29,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:30:30,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:30,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:30,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:30,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:30,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:30,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:30,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2021-06-05 04:30:30,211 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:30:30,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:30,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:30,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:30,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:30,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:30,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:30,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 36 [2021-06-05 04:30:30,224 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:30:30,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:30,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:30,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:30,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:30,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:30,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:30,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:30,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 36 [2021-06-05 04:30:30,239 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:30:30,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:30,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:30,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:30,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:30,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:30,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:30,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 44 [2021-06-05 04:30:30,247 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:30:30,306 INFO L628 ElimStorePlain]: treesize reduction 99, result has 40.4 percent of original size [2021-06-05 04:30:30,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:30,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:30:30,310 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:30:30,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:30:30,335 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:30:30,336 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:301, output treesize:62 [2021-06-05 04:30:30,419 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:30:30,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545269928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:30:30,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:30:30,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-06-05 04:30:30,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23874139] [2021-06-05 04:30:30,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:30:30,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:30:30,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:30:30,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:30:30,420 INFO L87 Difference]: Start difference. First operand 1020 states and 2865 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:30:31,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:30:31,230 INFO L93 Difference]: Finished difference Result 1136 states and 3101 transitions. [2021-06-05 04:30:31,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:30:31,231 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:30:31,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:30:31,232 INFO L225 Difference]: With dead ends: 1136 [2021-06-05 04:30:31,232 INFO L226 Difference]: Without dead ends: 1129 [2021-06-05 04:30:31,232 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1161.6ms TimeCoverageRelationStatistics Valid=136, Invalid=856, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:30:31,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1129 states. [2021-06-05 04:30:31,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1129 to 1037. [2021-06-05 04:30:31,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1037 states, 1036 states have (on average 2.8291505791505793) internal successors, (2931), 1036 states have internal predecessors, (2931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:30:31,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1037 states to 1037 states and 2931 transitions. [2021-06-05 04:30:31,242 INFO L78 Accepts]: Start accepts. Automaton has 1037 states and 2931 transitions. Word has length 18 [2021-06-05 04:30:31,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:30:31,242 INFO L482 AbstractCegarLoop]: Abstraction has 1037 states and 2931 transitions. [2021-06-05 04:30:31,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:30:31,242 INFO L276 IsEmpty]: Start isEmpty. Operand 1037 states and 2931 transitions. [2021-06-05 04:30:31,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:30:31,243 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:30:31,243 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:30:31,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2438,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:30:31,443 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:30:31,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:30:31,444 INFO L82 PathProgramCache]: Analyzing trace with hash -2018127868, now seen corresponding path program 345 times [2021-06-05 04:30:31,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:30:31,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220631694] [2021-06-05 04:30:31,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:30:31,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:30:31,692 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:30:31,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:30:31,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220631694] [2021-06-05 04:30:31,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220631694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:30:31,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649022294] [2021-06-05 04:30:31,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:30:31,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:30:31,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:30:31,723 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 04:30:31,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:30:32,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:32,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:32,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:32,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:32,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:32,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:32,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-06-05 04:30:32,410 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:30:32,431 INFO L628 ElimStorePlain]: treesize reduction 143, result has 7.1 percent of original size [2021-06-05 04:30:32,431 INFO L518 ElimStorePlain]: Eliminatee v_prenex_191 vanished before elimination [2021-06-05 04:30:32,431 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-05 04:30:32,431 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:30:32,431 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:30:32,431 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:194, output treesize:11 [2021-06-05 04:30:32,460 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:30:32,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649022294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:30:32,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:30:32,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-06-05 04:30:32,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768008616] [2021-06-05 04:30:32,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:30:32,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:30:32,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:30:32,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:30:32,461 INFO L87 Difference]: Start difference. First operand 1037 states and 2931 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:30:33,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:30:33,444 INFO L93 Difference]: Finished difference Result 1209 states and 3323 transitions. [2021-06-05 04:30:33,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:30:33,444 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:30:33,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:30:33,445 INFO L225 Difference]: With dead ends: 1209 [2021-06-05 04:30:33,445 INFO L226 Difference]: Without dead ends: 1205 [2021-06-05 04:30:33,446 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 1397.3ms TimeCoverageRelationStatistics Valid=130, Invalid=862, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:30:33,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1205 states. [2021-06-05 04:30:33,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1205 to 1051. [2021-06-05 04:30:33,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1051 states, 1050 states have (on average 2.84) internal successors, (2982), 1050 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:30:33,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1051 states to 1051 states and 2982 transitions. [2021-06-05 04:30:33,457 INFO L78 Accepts]: Start accepts. Automaton has 1051 states and 2982 transitions. Word has length 18 [2021-06-05 04:30:33,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:30:33,457 INFO L482 AbstractCegarLoop]: Abstraction has 1051 states and 2982 transitions. [2021-06-05 04:30:33,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:30:33,457 INFO L276 IsEmpty]: Start isEmpty. Operand 1051 states and 2982 transitions. [2021-06-05 04:30:33,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:30:33,458 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:30:33,458 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:30:33,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2448 [2021-06-05 04:30:33,659 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:30:33,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:30:33,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1625646980, now seen corresponding path program 346 times [2021-06-05 04:30:33,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:30:33,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132132166] [2021-06-05 04:30:33,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:30:33,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:30:33,971 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:30:33,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:30:33,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132132166] [2021-06-05 04:30:33,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132132166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:30:33,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592760247] [2021-06-05 04:30:33,971 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:30:33,999 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:30:34,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:30:34,000 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 04:30:34,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:30:34,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:34,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:34,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:34,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:34,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:34,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:34,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:34,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:34,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:34,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:34,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 32 [2021-06-05 04:30:34,679 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:30:34,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:34,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:34,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:34,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:34,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:34,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:34,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:34,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:34,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:34,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-05 04:30:34,689 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:30:34,738 INFO L628 ElimStorePlain]: treesize reduction 95, result has 46.3 percent of original size [2021-06-05 04:30:34,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:34,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:34,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:34,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:34,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:34,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:34,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:34,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:34,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:34,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:34,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-06-05 04:30:34,748 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:30:34,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:30:34,759 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:30:34,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:34,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:30:34,762 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:30:34,772 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:30:34,773 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:30:34,774 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:257, output treesize:22 [2021-06-05 04:30:34,813 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:30:34,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592760247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:30:34,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:30:34,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 04:30:34,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619395508] [2021-06-05 04:30:34,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:30:34,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:30:34,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:30:34,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=375, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:30:34,814 INFO L87 Difference]: Start difference. First operand 1051 states and 2982 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:30:35,325 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2021-06-05 04:30:36,099 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2021-06-05 04:30:36,255 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 86 [2021-06-05 04:30:36,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:30:36,370 INFO L93 Difference]: Finished difference Result 1096 states and 3062 transitions. [2021-06-05 04:30:36,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:30:36,370 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:30:36,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:30:36,371 INFO L225 Difference]: With dead ends: 1096 [2021-06-05 04:30:36,371 INFO L226 Difference]: Without dead ends: 1082 [2021-06-05 04:30:36,372 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1947.2ms TimeCoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:30:36,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2021-06-05 04:30:36,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 1022. [2021-06-05 04:30:36,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 1021 states have (on average 2.8481880509304602) internal successors, (2908), 1021 states have internal predecessors, (2908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:30:36,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 2908 transitions. [2021-06-05 04:30:36,381 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 2908 transitions. Word has length 18 [2021-06-05 04:30:36,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:30:36,381 INFO L482 AbstractCegarLoop]: Abstraction has 1022 states and 2908 transitions. [2021-06-05 04:30:36,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:30:36,381 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 2908 transitions. [2021-06-05 04:30:36,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:30:36,382 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:30:36,382 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:30:36,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2468 [2021-06-05 04:30:36,582 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:30:36,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:30:36,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1596234936, now seen corresponding path program 347 times [2021-06-05 04:30:36,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:30:36,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649632551] [2021-06-05 04:30:36,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:30:36,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:30:36,875 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:30:36,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:30:36,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649632551] [2021-06-05 04:30:36,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649632551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:30:36,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047987570] [2021-06-05 04:30:36,876 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:30:36,907 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:30:36,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:30:36,908 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 04:30:36,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:30:37,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:37,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:37,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:37,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:37,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:37,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:37,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:37,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:37,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:37,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-05 04:30:37,588 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:30:37,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:37,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:37,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:37,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:37,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:37,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:37,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:37,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:37,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-06-05 04:30:37,598 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:30:37,611 INFO L628 ElimStorePlain]: treesize reduction 106, result has 9.4 percent of original size [2021-06-05 04:30:37,612 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:30:37,612 INFO L518 ElimStorePlain]: Eliminatee v_prenex_198 vanished before elimination [2021-06-05 04:30:37,612 INFO L518 ElimStorePlain]: Eliminatee v_prenex_199 vanished before elimination [2021-06-05 04:30:37,612 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:30:37,612 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-06-05 04:30:37,644 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:30:37,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047987570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:30:37,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:30:37,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 04:30:37,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955895796] [2021-06-05 04:30:37,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:30:37,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:30:37,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:30:37,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:30:37,645 INFO L87 Difference]: Start difference. First operand 1022 states and 2908 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:30:38,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:30:38,940 INFO L93 Difference]: Finished difference Result 1197 states and 3268 transitions. [2021-06-05 04:30:38,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:30:38,941 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:30:38,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:30:38,942 INFO L225 Difference]: With dead ends: 1197 [2021-06-05 04:30:38,942 INFO L226 Difference]: Without dead ends: 1187 [2021-06-05 04:30:38,942 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1630.7ms TimeCoverageRelationStatistics Valid=132, Invalid=924, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:30:38,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1187 states. [2021-06-05 04:30:38,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1187 to 1054. [2021-06-05 04:30:38,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1054 states, 1053 states have (on average 2.8622981956315288) internal successors, (3014), 1053 states have internal predecessors, (3014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:30:38,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1054 states to 1054 states and 3014 transitions. [2021-06-05 04:30:38,952 INFO L78 Accepts]: Start accepts. Automaton has 1054 states and 3014 transitions. Word has length 18 [2021-06-05 04:30:38,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:30:38,952 INFO L482 AbstractCegarLoop]: Abstraction has 1054 states and 3014 transitions. [2021-06-05 04:30:38,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:30:38,952 INFO L276 IsEmpty]: Start isEmpty. Operand 1054 states and 3014 transitions. [2021-06-05 04:30:38,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:30:38,953 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:30:38,953 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:30:39,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2487,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:30:39,154 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:30:39,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:30:39,154 INFO L82 PathProgramCache]: Analyzing trace with hash -561310396, now seen corresponding path program 348 times [2021-06-05 04:30:39,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:30:39,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172456832] [2021-06-05 04:30:39,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:30:39,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:30:39,519 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:30:39,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:30:39,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172456832] [2021-06-05 04:30:39,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172456832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:30:39,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908752031] [2021-06-05 04:30:39,520 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:30:39,563 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:30:39,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:30:39,564 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 04:30:39,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:30:40,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:40,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:40,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:40,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:40,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:40,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:40,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:40,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 36 [2021-06-05 04:30:40,119 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:30:40,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:40,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:40,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:40,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:40,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:40,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:40,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 36 [2021-06-05 04:30:40,132 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:30:40,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:40,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:40,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:40,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:40,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:40,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:40,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:40,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 44 [2021-06-05 04:30:40,146 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:30:40,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:40,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:40,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:40,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:40,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:40,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2021-06-05 04:30:40,153 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:30:40,212 INFO L628 ElimStorePlain]: treesize reduction 95, result has 41.4 percent of original size [2021-06-05 04:30:40,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:40,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:30:40,216 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:30:40,240 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:30:40,241 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:30:40,241 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:301, output treesize:62 [2021-06-05 04:30:40,327 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:30:40,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908752031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:30:40,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:30:40,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 04:30:40,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80477965] [2021-06-05 04:30:40,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:30:40,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:30:40,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:30:40,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:30:40,328 INFO L87 Difference]: Start difference. First operand 1054 states and 3014 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:30:41,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:30:41,296 INFO L93 Difference]: Finished difference Result 1175 states and 3258 transitions. [2021-06-05 04:30:41,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 04:30:41,296 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:30:41,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:30:41,298 INFO L225 Difference]: With dead ends: 1175 [2021-06-05 04:30:41,298 INFO L226 Difference]: Without dead ends: 1169 [2021-06-05 04:30:41,298 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 1390.6ms TimeCoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 04:30:41,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2021-06-05 04:30:41,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 1084. [2021-06-05 04:30:41,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1084 states, 1083 states have (on average 2.853185595567867) internal successors, (3090), 1083 states have internal predecessors, (3090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:30:41,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1084 states to 1084 states and 3090 transitions. [2021-06-05 04:30:41,308 INFO L78 Accepts]: Start accepts. Automaton has 1084 states and 3090 transitions. Word has length 18 [2021-06-05 04:30:41,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:30:41,308 INFO L482 AbstractCegarLoop]: Abstraction has 1084 states and 3090 transitions. [2021-06-05 04:30:41,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:30:41,308 INFO L276 IsEmpty]: Start isEmpty. Operand 1084 states and 3090 transitions. [2021-06-05 04:30:41,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:30:41,309 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:30:41,309 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:30:41,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2507,353 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:30:41,510 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:30:41,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:30:41,510 INFO L82 PathProgramCache]: Analyzing trace with hash 100224874, now seen corresponding path program 349 times [2021-06-05 04:30:41,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:30:41,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207849466] [2021-06-05 04:30:41,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:30:41,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:30:42,055 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:30:42,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:30:42,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207849466] [2021-06-05 04:30:42,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207849466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:30:42,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373262160] [2021-06-05 04:30:42,055 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:30:42,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:30:42,085 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 04:30:42,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:30:42,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:42,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:42,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:42,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:42,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:42,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:42,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:42,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:42,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-06-05 04:30:42,738 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:30:42,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:42,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:42,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:42,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:42,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:42,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:42,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:42,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:42,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:42,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 40 [2021-06-05 04:30:42,753 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:30:42,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:42,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:42,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:42,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:42,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:42,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:42,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:42,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-06-05 04:30:42,762 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:30:42,773 INFO L628 ElimStorePlain]: treesize reduction 66, result has 14.3 percent of original size [2021-06-05 04:30:42,773 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:30:42,773 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:30:42,774 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:194, output treesize:11 [2021-06-05 04:30:42,807 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:30:42,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373262160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:30:42,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:30:42,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 04:30:42,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703241487] [2021-06-05 04:30:42,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:30:42,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:30:42,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:30:42,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:30:42,807 INFO L87 Difference]: Start difference. First operand 1084 states and 3090 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:30:44,417 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 74 [2021-06-05 04:30:44,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:30:44,743 INFO L93 Difference]: Finished difference Result 1234 states and 3429 transitions. [2021-06-05 04:30:44,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 04:30:44,744 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:30:44,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:30:44,745 INFO L225 Difference]: With dead ends: 1234 [2021-06-05 04:30:44,745 INFO L226 Difference]: Without dead ends: 1228 [2021-06-05 04:30:44,745 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 2381.1ms TimeCoverageRelationStatistics Valid=150, Invalid=1410, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 04:30:44,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1228 states. [2021-06-05 04:30:44,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1228 to 1110. [2021-06-05 04:30:44,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1110 states, 1109 states have (on average 2.8674481514878267) internal successors, (3180), 1109 states have internal predecessors, (3180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:30:44,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1110 states to 1110 states and 3180 transitions. [2021-06-05 04:30:44,756 INFO L78 Accepts]: Start accepts. Automaton has 1110 states and 3180 transitions. Word has length 18 [2021-06-05 04:30:44,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:30:44,756 INFO L482 AbstractCegarLoop]: Abstraction has 1110 states and 3180 transitions. [2021-06-05 04:30:44,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:30:44,757 INFO L276 IsEmpty]: Start isEmpty. Operand 1110 states and 3180 transitions. [2021-06-05 04:30:44,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:30:44,757 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:30:44,758 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:30:44,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2517,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:30:44,958 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:30:44,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:30:44,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1381449724, now seen corresponding path program 350 times [2021-06-05 04:30:44,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:30:44,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084865634] [2021-06-05 04:30:44,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:30:44,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:30:45,326 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2021-06-05 04:30:45,705 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:30:45,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:30:45,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084865634] [2021-06-05 04:30:45,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084865634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:30:45,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712770665] [2021-06-05 04:30:45,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:30:45,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:30:45,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:30:45,735 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 04:30:45,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:30:46,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:46,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:46,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:46,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:46,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:46,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:46,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:46,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:46,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:46,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:46,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 48 [2021-06-05 04:30:46,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:30:46,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:46,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:46,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:46,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:46,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:46,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:46,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:46,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:46,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:46,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:46,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 32 [2021-06-05 04:30:46,341 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:30:46,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:46,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:46,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:46,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:46,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:46,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:46,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:46,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:46,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:46,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:46,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-05 04:30:46,357 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:30:46,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:46,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:46,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:46,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:46,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:46,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:46,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:46,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:46,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:46,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-05 04:30:46,367 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:30:46,427 INFO L628 ElimStorePlain]: treesize reduction 99, result has 40.4 percent of original size [2021-06-05 04:30:46,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:46,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:30:46,431 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:30:46,455 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:30:46,456 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:30:46,456 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:333, output treesize:62 [2021-06-05 04:30:46,549 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:30:46,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712770665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:30:46,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:30:46,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 04:30:46,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978891425] [2021-06-05 04:30:46,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 04:30:46,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:30:46,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 04:30:46,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:30:46,550 INFO L87 Difference]: Start difference. First operand 1110 states and 3180 transitions. Second operand has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:30:47,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:30:47,905 INFO L93 Difference]: Finished difference Result 1169 states and 3296 transitions. [2021-06-05 04:30:47,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:30:47,905 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:30:47,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:30:47,907 INFO L225 Difference]: With dead ends: 1169 [2021-06-05 04:30:47,907 INFO L226 Difference]: Without dead ends: 1161 [2021-06-05 04:30:47,907 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 2120.1ms TimeCoverageRelationStatistics Valid=141, Invalid=1049, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:30:47,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1161 states. [2021-06-05 04:30:47,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1161 to 1116. [2021-06-05 04:30:47,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1116 states, 1115 states have (on average 2.8681614349775786) internal successors, (3198), 1115 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:30:47,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1116 states to 1116 states and 3198 transitions. [2021-06-05 04:30:47,918 INFO L78 Accepts]: Start accepts. Automaton has 1116 states and 3198 transitions. Word has length 18 [2021-06-05 04:30:47,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:30:47,918 INFO L482 AbstractCegarLoop]: Abstraction has 1116 states and 3198 transitions. [2021-06-05 04:30:47,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:30:47,918 INFO L276 IsEmpty]: Start isEmpty. Operand 1116 states and 3198 transitions. [2021-06-05 04:30:47,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:30:47,919 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:30:47,919 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:30:48,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2539,355 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:30:48,120 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:30:48,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:30:48,120 INFO L82 PathProgramCache]: Analyzing trace with hash -308364344, now seen corresponding path program 351 times [2021-06-05 04:30:48,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:30:48,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698482609] [2021-06-05 04:30:48,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:30:48,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:30:48,693 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:30:48,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:30:48,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698482609] [2021-06-05 04:30:48,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698482609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:30:48,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021421128] [2021-06-05 04:30:48,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:30:48,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:30:48,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:30:48,725 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 04:30:48,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:30:49,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:49,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:49,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:49,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:49,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:49,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:49,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:49,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:49,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:49,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-06-05 04:30:49,385 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:30:49,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:49,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:49,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:49,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:49,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:49,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:49,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:49,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:49,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-05 04:30:49,414 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:30:49,432 INFO L628 ElimStorePlain]: treesize reduction 116, result has 8.7 percent of original size [2021-06-05 04:30:49,433 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:30:49,433 INFO L518 ElimStorePlain]: Eliminatee v_prenex_201 vanished before elimination [2021-06-05 04:30:49,433 INFO L518 ElimStorePlain]: Eliminatee v_prenex_202 vanished before elimination [2021-06-05 04:30:49,433 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:30:49,433 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-06-05 04:30:49,482 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:30:49,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021421128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:30:49,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:30:49,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 04:30:49,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108308569] [2021-06-05 04:30:49,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:30:49,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:30:49,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:30:49,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=459, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:30:49,483 INFO L87 Difference]: Start difference. First operand 1116 states and 3198 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:30:50,622 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2021-06-05 04:30:50,872 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 85 [2021-06-05 04:30:51,099 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 86 [2021-06-05 04:30:51,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:30:51,428 INFO L93 Difference]: Finished difference Result 1180 states and 3324 transitions. [2021-06-05 04:30:51,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:30:51,428 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:30:51,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:30:51,430 INFO L225 Difference]: With dead ends: 1180 [2021-06-05 04:30:51,430 INFO L226 Difference]: Without dead ends: 1172 [2021-06-05 04:30:51,430 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 2415.0ms TimeCoverageRelationStatistics Valid=144, Invalid=1338, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 04:30:51,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1172 states. [2021-06-05 04:30:51,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1172 to 1122. [2021-06-05 04:30:51,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 1121 states have (on average 2.8688670829616414) internal successors, (3216), 1121 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:30:51,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 3216 transitions. [2021-06-05 04:30:51,441 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 3216 transitions. Word has length 18 [2021-06-05 04:30:51,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:30:51,441 INFO L482 AbstractCegarLoop]: Abstraction has 1122 states and 3216 transitions. [2021-06-05 04:30:51,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:30:51,441 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 3216 transitions. [2021-06-05 04:30:51,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:30:51,442 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:30:51,442 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:30:51,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2549,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:30:51,642 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:30:51,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:30:51,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1402455932, now seen corresponding path program 352 times [2021-06-05 04:30:51,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:30:51,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024405493] [2021-06-05 04:30:51,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:30:51,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:30:52,069 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:30:52,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:30:52,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024405493] [2021-06-05 04:30:52,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024405493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:30:52,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141435447] [2021-06-05 04:30:52,070 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:30:52,098 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:30:52,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:30:52,099 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 04:30:52,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:30:52,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:52,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:52,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:52,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:52,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:52,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:52,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:52,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:52,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:52,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:52,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 32 [2021-06-05 04:30:52,802 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:30:52,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:52,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:52,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:52,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:52,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:52,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:52,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:52,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:52,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:52,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-05 04:30:52,812 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:30:52,858 INFO L628 ElimStorePlain]: treesize reduction 91, result has 47.4 percent of original size [2021-06-05 04:30:52,858 INFO L518 ElimStorePlain]: Eliminatee v_prenex_209 vanished before elimination [2021-06-05 04:30:52,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:52,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:52,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:52,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:52,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:52,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:52,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:52,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:52,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:52,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-06-05 04:30:52,867 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:30:52,878 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:30:52,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:52,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:30:52,881 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:30:52,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:30:52,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:30:52,892 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:257, output treesize:22 [2021-06-05 04:30:52,917 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:30:52,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141435447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:30:52,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:30:52,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 04:30:52,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539008942] [2021-06-05 04:30:52,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:30:52,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:30:52,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:30:52,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=418, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:30:52,918 INFO L87 Difference]: Start difference. First operand 1122 states and 3216 transitions. Second operand has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:30:54,021 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 86 [2021-06-05 04:30:54,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:30:54,627 INFO L93 Difference]: Finished difference Result 1176 states and 3324 transitions. [2021-06-05 04:30:54,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:30:54,628 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:30:54,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:30:54,629 INFO L225 Difference]: With dead ends: 1176 [2021-06-05 04:30:54,629 INFO L226 Difference]: Without dead ends: 1173 [2021-06-05 04:30:54,629 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 2032.4ms TimeCoverageRelationStatistics Valid=105, Invalid=1085, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:30:54,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2021-06-05 04:30:54,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 1123. [2021-06-05 04:30:54,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1123 states, 1122 states have (on average 2.8689839572192515) internal successors, (3219), 1122 states have internal predecessors, (3219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:30:54,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1123 states to 1123 states and 3219 transitions. [2021-06-05 04:30:54,640 INFO L78 Accepts]: Start accepts. Automaton has 1123 states and 3219 transitions. Word has length 18 [2021-06-05 04:30:54,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:30:54,640 INFO L482 AbstractCegarLoop]: Abstraction has 1123 states and 3219 transitions. [2021-06-05 04:30:54,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:30:54,640 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states and 3219 transitions. [2021-06-05 04:30:54,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:30:54,641 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:30:54,641 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:30:54,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2569 [2021-06-05 04:30:54,841 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:30:54,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:30:54,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1956158810, now seen corresponding path program 353 times [2021-06-05 04:30:54,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:30:54,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469493049] [2021-06-05 04:30:54,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:30:54,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:30:55,042 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:30:55,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:30:55,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469493049] [2021-06-05 04:30:55,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469493049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:30:55,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087487705] [2021-06-05 04:30:55,042 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:30:55,071 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:30:55,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:30:55,072 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 04:30:55,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:30:55,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:55,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:55,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 36 [2021-06-05 04:30:55,570 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:30:55,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:55,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:55,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:55,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-06-05 04:30:55,580 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:30:55,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:55,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-06-05 04:30:55,584 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:30:55,596 INFO L628 ElimStorePlain]: treesize reduction 72, result has 13.3 percent of original size [2021-06-05 04:30:55,596 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:30:55,597 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:30:55,597 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:170, output treesize:11 [2021-06-05 04:30:55,605 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:30:55,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087487705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:30:55,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:30:55,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 04:30:55,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994266984] [2021-06-05 04:30:55,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:30:55,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:30:55,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:30:55,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:30:55,605 INFO L87 Difference]: Start difference. First operand 1123 states and 3219 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:30:56,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:30:56,159 INFO L93 Difference]: Finished difference Result 1166 states and 3305 transitions. [2021-06-05 04:30:56,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:30:56,159 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:30:56,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:30:56,161 INFO L225 Difference]: With dead ends: 1166 [2021-06-05 04:30:56,161 INFO L226 Difference]: Without dead ends: 1159 [2021-06-05 04:30:56,161 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 802.8ms TimeCoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:30:56,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2021-06-05 04:30:56,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 1131. [2021-06-05 04:30:56,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1131 states, 1130 states have (on average 2.8628318584070795) internal successors, (3235), 1130 states have internal predecessors, (3235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:30:56,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 3235 transitions. [2021-06-05 04:30:56,177 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 3235 transitions. Word has length 18 [2021-06-05 04:30:56,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:30:56,177 INFO L482 AbstractCegarLoop]: Abstraction has 1131 states and 3235 transitions. [2021-06-05 04:30:56,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:30:56,177 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 3235 transitions. [2021-06-05 04:30:56,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:30:56,178 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:30:56,178 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:30:56,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 358 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2589 [2021-06-05 04:30:56,378 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:30:56,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:30:56,379 INFO L82 PathProgramCache]: Analyzing trace with hash -454160794, now seen corresponding path program 354 times [2021-06-05 04:30:56,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:30:56,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993565601] [2021-06-05 04:30:56,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:30:56,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:30:56,583 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:30:56,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:30:56,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993565601] [2021-06-05 04:30:56,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993565601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:30:56,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920052790] [2021-06-05 04:30:56,583 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:30:56,614 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:30:56,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:30:56,615 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 04:30:56,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:30:57,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:57,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:57,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 36 [2021-06-05 04:30:57,141 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:30:57,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:57,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:57,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:57,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-06-05 04:30:57,150 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:30:57,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:57,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-06-05 04:30:57,154 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:30:57,166 INFO L628 ElimStorePlain]: treesize reduction 72, result has 13.3 percent of original size [2021-06-05 04:30:57,166 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:30:57,167 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:30:57,167 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:170, output treesize:11 [2021-06-05 04:30:57,175 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:30:57,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920052790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:30:57,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:30:57,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 04:30:57,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886787540] [2021-06-05 04:30:57,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:30:57,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:30:57,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:30:57,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:30:57,175 INFO L87 Difference]: Start difference. First operand 1131 states and 3235 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:30:57,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:30:57,836 INFO L93 Difference]: Finished difference Result 1217 states and 3385 transitions. [2021-06-05 04:30:57,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:30:57,836 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:30:57,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:30:57,838 INFO L225 Difference]: With dead ends: 1217 [2021-06-05 04:30:57,838 INFO L226 Difference]: Without dead ends: 1207 [2021-06-05 04:30:57,838 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 950.7ms TimeCoverageRelationStatistics Valid=139, Invalid=791, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:30:57,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1207 states. [2021-06-05 04:30:57,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1207 to 1153. [2021-06-05 04:30:57,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1153 states, 1152 states have (on average 2.859375) internal successors, (3294), 1152 states have internal predecessors, (3294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:30:57,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 3294 transitions. [2021-06-05 04:30:57,849 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 3294 transitions. Word has length 18 [2021-06-05 04:30:57,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:30:57,849 INFO L482 AbstractCegarLoop]: Abstraction has 1153 states and 3294 transitions. [2021-06-05 04:30:57,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:30:57,849 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 3294 transitions. [2021-06-05 04:30:57,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:30:57,850 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:30:57,850 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:30:58,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2619 [2021-06-05 04:30:58,050 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:30:58,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:30:58,051 INFO L82 PathProgramCache]: Analyzing trace with hash -206788058, now seen corresponding path program 355 times [2021-06-05 04:30:58,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:30:58,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695430232] [2021-06-05 04:30:58,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:30:58,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:30:58,502 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:30:58,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:30:58,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695430232] [2021-06-05 04:30:58,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695430232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:30:58,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116922726] [2021-06-05 04:30:58,502 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:30:58,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:30:58,531 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 04:30:58,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:30:59,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:59,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:59,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:59,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:30:59,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:30:59,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 36 [2021-06-05 04:30:59,223 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:30:59,243 INFO L628 ElimStorePlain]: treesize reduction 139, result has 7.3 percent of original size [2021-06-05 04:30:59,243 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:30:59,243 INFO L518 ElimStorePlain]: Eliminatee v_prenex_211 vanished before elimination [2021-06-05 04:30:59,243 INFO L518 ElimStorePlain]: Eliminatee v_prenex_212 vanished before elimination [2021-06-05 04:30:59,243 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:30:59,243 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:182, output treesize:11 [2021-06-05 04:30:59,279 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:30:59,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116922726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:30:59,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:30:59,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 04:30:59,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35707848] [2021-06-05 04:30:59,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:30:59,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:30:59,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:30:59,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:30:59,280 INFO L87 Difference]: Start difference. First operand 1153 states and 3294 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:00,222 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2021-06-05 04:31:00,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:00,456 INFO L93 Difference]: Finished difference Result 1167 states and 3321 transitions. [2021-06-05 04:31:00,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:31:00,456 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:31:00,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:00,457 INFO L225 Difference]: With dead ends: 1167 [2021-06-05 04:31:00,457 INFO L226 Difference]: Without dead ends: 1164 [2021-06-05 04:31:00,458 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1791.4ms TimeCoverageRelationStatistics Valid=104, Invalid=952, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:31:00,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2021-06-05 04:31:00,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 1153. [2021-06-05 04:31:00,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1153 states, 1152 states have (on average 2.859375) internal successors, (3294), 1152 states have internal predecessors, (3294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:00,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 3294 transitions. [2021-06-05 04:31:00,468 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 3294 transitions. Word has length 18 [2021-06-05 04:31:00,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:00,468 INFO L482 AbstractCegarLoop]: Abstraction has 1153 states and 3294 transitions. [2021-06-05 04:31:00,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:00,468 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 3294 transitions. [2021-06-05 04:31:00,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:31:00,469 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:00,469 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:00,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2650,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:00,670 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:00,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:00,670 INFO L82 PathProgramCache]: Analyzing trace with hash 207374476, now seen corresponding path program 356 times [2021-06-05 04:31:00,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:00,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566000386] [2021-06-05 04:31:00,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:00,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:00,975 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:31:00,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:00,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566000386] [2021-06-05 04:31:00,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566000386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:00,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255661580] [2021-06-05 04:31:00,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:01,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:31:01,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:31:01,004 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 04:31:01,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:01,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:01,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:01,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:01,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:01,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:01,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 36 [2021-06-05 04:31:01,668 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:01,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:01,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:01,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:01,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:01,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:01,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 36 [2021-06-05 04:31:01,679 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:01,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:01,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:01,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:01,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:01,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:01,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 38 [2021-06-05 04:31:01,685 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:01,698 INFO L628 ElimStorePlain]: treesize reduction 76, result has 12.6 percent of original size [2021-06-05 04:31:01,699 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:31:01,699 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:31:01,699 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:182, output treesize:11 [2021-06-05 04:31:01,728 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:31:01,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255661580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:01,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:01,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 04:31:01,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182726085] [2021-06-05 04:31:01,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:31:01,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:01,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:31:01,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:31:01,729 INFO L87 Difference]: Start difference. First operand 1153 states and 3294 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:02,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:02,856 INFO L93 Difference]: Finished difference Result 1228 states and 3438 transitions. [2021-06-05 04:31:02,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:31:02,856 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:31:02,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:02,858 INFO L225 Difference]: With dead ends: 1228 [2021-06-05 04:31:02,858 INFO L226 Difference]: Without dead ends: 1225 [2021-06-05 04:31:02,858 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 1598.4ms TimeCoverageRelationStatistics Valid=129, Invalid=863, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:31:02,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1225 states. [2021-06-05 04:31:02,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1225 to 1172. [2021-06-05 04:31:02,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1172 states, 1171 states have (on average 2.8659265584970113) internal successors, (3356), 1171 states have internal predecessors, (3356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:02,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1172 states to 1172 states and 3356 transitions. [2021-06-05 04:31:02,868 INFO L78 Accepts]: Start accepts. Automaton has 1172 states and 3356 transitions. Word has length 18 [2021-06-05 04:31:02,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:02,868 INFO L482 AbstractCegarLoop]: Abstraction has 1172 states and 3356 transitions. [2021-06-05 04:31:02,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:02,868 INFO L276 IsEmpty]: Start isEmpty. Operand 1172 states and 3356 transitions. [2021-06-05 04:31:02,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:31:02,869 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:02,869 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:03,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2669 [2021-06-05 04:31:03,070 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:03,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:03,070 INFO L82 PathProgramCache]: Analyzing trace with hash 215104874, now seen corresponding path program 357 times [2021-06-05 04:31:03,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:03,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756392526] [2021-06-05 04:31:03,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:03,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:03,242 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:31:03,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:03,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756392526] [2021-06-05 04:31:03,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756392526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:03,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352922433] [2021-06-05 04:31:03,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:03,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:31:03,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:31:03,274 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 04:31:03,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:03,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:03,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:03,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:03,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:03,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:03,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:03,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:03,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:03,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-06-05 04:31:03,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:03,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:03,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:03,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:03,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:03,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:03,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:03,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:03,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:03,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 40 [2021-06-05 04:31:03,937 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:03,950 INFO L628 ElimStorePlain]: treesize reduction 108, result has 9.2 percent of original size [2021-06-05 04:31:03,950 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:31:03,950 INFO L518 ElimStorePlain]: Eliminatee v_prenex_214 vanished before elimination [2021-06-05 04:31:03,950 INFO L518 ElimStorePlain]: Eliminatee v_prenex_215 vanished before elimination [2021-06-05 04:31:03,951 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:31:03,951 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:194, output treesize:11 [2021-06-05 04:31:03,960 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:31:03,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352922433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:03,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:03,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 04:31:03,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014763179] [2021-06-05 04:31:03,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:31:03,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:03,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:31:03,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:31:03,961 INFO L87 Difference]: Start difference. First operand 1172 states and 3356 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:04,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:04,482 INFO L93 Difference]: Finished difference Result 1280 states and 3562 transitions. [2021-06-05 04:31:04,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:31:04,483 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:31:04,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:04,484 INFO L225 Difference]: With dead ends: 1280 [2021-06-05 04:31:04,484 INFO L226 Difference]: Without dead ends: 1276 [2021-06-05 04:31:04,484 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 911.4ms TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:31:04,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2021-06-05 04:31:04,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 1203. [2021-06-05 04:31:04,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1203 states, 1202 states have (on average 2.866056572379368) internal successors, (3445), 1202 states have internal predecessors, (3445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:04,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1203 states to 1203 states and 3445 transitions. [2021-06-05 04:31:04,496 INFO L78 Accepts]: Start accepts. Automaton has 1203 states and 3445 transitions. Word has length 18 [2021-06-05 04:31:04,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:04,496 INFO L482 AbstractCegarLoop]: Abstraction has 1203 states and 3445 transitions. [2021-06-05 04:31:04,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:04,496 INFO L276 IsEmpty]: Start isEmpty. Operand 1203 states and 3445 transitions. [2021-06-05 04:31:04,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:31:04,497 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:04,497 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:04,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2693,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:04,697 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:04,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:04,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1274300122, now seen corresponding path program 358 times [2021-06-05 04:31:04,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:04,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312106975] [2021-06-05 04:31:04,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:04,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:05,084 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:31:05,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:05,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312106975] [2021-06-05 04:31:05,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312106975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:05,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200548095] [2021-06-05 04:31:05,084 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:05,113 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:31:05,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:31:05,114 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 04:31:05,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:05,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:05,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:05,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:05,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:05,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:05,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:05,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:05,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:05,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-06-05 04:31:05,766 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:05,784 INFO L628 ElimStorePlain]: treesize reduction 147, result has 7.0 percent of original size [2021-06-05 04:31:05,784 INFO L518 ElimStorePlain]: Eliminatee v_prenex_218 vanished before elimination [2021-06-05 04:31:05,784 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-05 04:31:05,784 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:31:05,784 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:31:05,785 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:194, output treesize:11 [2021-06-05 04:31:05,819 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:31:05,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200548095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:05,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:05,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 04:31:05,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767678982] [2021-06-05 04:31:05,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:31:05,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:05,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:31:05,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:31:05,820 INFO L87 Difference]: Start difference. First operand 1203 states and 3445 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:06,586 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 59 [2021-06-05 04:31:06,933 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-06-05 04:31:07,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:07,369 INFO L93 Difference]: Finished difference Result 1294 states and 3628 transitions. [2021-06-05 04:31:07,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:31:07,370 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:31:07,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:07,371 INFO L225 Difference]: With dead ends: 1294 [2021-06-05 04:31:07,371 INFO L226 Difference]: Without dead ends: 1288 [2021-06-05 04:31:07,371 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1937.7ms TimeCoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:31:07,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1288 states. [2021-06-05 04:31:07,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1288 to 1215. [2021-06-05 04:31:07,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1215 states, 1214 states have (on average 2.8739703459637562) internal successors, (3489), 1214 states have internal predecessors, (3489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:07,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1215 states to 1215 states and 3489 transitions. [2021-06-05 04:31:07,383 INFO L78 Accepts]: Start accepts. Automaton has 1215 states and 3489 transitions. Word has length 18 [2021-06-05 04:31:07,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:07,383 INFO L482 AbstractCegarLoop]: Abstraction has 1215 states and 3489 transitions. [2021-06-05 04:31:07,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:07,383 INFO L276 IsEmpty]: Start isEmpty. Operand 1215 states and 3489 transitions. [2021-06-05 04:31:07,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:31:07,384 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:07,384 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:07,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2713,363 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:07,585 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:07,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:07,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1080521118, now seen corresponding path program 359 times [2021-06-05 04:31:07,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:07,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238788666] [2021-06-05 04:31:07,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:07,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:07,828 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:31:07,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:07,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238788666] [2021-06-05 04:31:07,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238788666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:07,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673682793] [2021-06-05 04:31:07,829 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:07,859 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:31:07,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:31:07,860 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 04:31:07,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:08,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:08,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:08,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:08,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:08,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:08,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:08,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:08,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:08,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:08,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-06-05 04:31:08,448 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:08,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:08,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:08,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:08,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:08,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:08,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:08,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:08,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:08,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-05 04:31:08,458 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:08,471 INFO L628 ElimStorePlain]: treesize reduction 110, result has 9.1 percent of original size [2021-06-05 04:31:08,471 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:31:08,471 INFO L518 ElimStorePlain]: Eliminatee v_prenex_220 vanished before elimination [2021-06-05 04:31:08,471 INFO L518 ElimStorePlain]: Eliminatee v_prenex_221 vanished before elimination [2021-06-05 04:31:08,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:31:08,471 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-06-05 04:31:08,507 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:31:08,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673682793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:08,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:08,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-06-05 04:31:08,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360095207] [2021-06-05 04:31:08,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:31:08,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:08,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:31:08,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:31:08,508 INFO L87 Difference]: Start difference. First operand 1215 states and 3489 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:09,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:09,221 INFO L93 Difference]: Finished difference Result 1295 states and 3647 transitions. [2021-06-05 04:31:09,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:31:09,221 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:31:09,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:09,223 INFO L225 Difference]: With dead ends: 1295 [2021-06-05 04:31:09,223 INFO L226 Difference]: Without dead ends: 1291 [2021-06-05 04:31:09,223 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1048.4ms TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:31:09,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1291 states. [2021-06-05 04:31:09,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1291 to 1238. [2021-06-05 04:31:09,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 1237 states have (on average 2.8746968472109944) internal successors, (3556), 1237 states have internal predecessors, (3556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:09,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 3556 transitions. [2021-06-05 04:31:09,234 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 3556 transitions. Word has length 18 [2021-06-05 04:31:09,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:09,234 INFO L482 AbstractCegarLoop]: Abstraction has 1238 states and 3556 transitions. [2021-06-05 04:31:09,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:09,234 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 3556 transitions. [2021-06-05 04:31:09,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:31:09,235 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:09,235 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:09,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2732 [2021-06-05 04:31:09,435 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:09,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:09,436 INFO L82 PathProgramCache]: Analyzing trace with hash -7435738, now seen corresponding path program 360 times [2021-06-05 04:31:09,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:09,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783374804] [2021-06-05 04:31:09,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:09,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:09,764 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:31:09,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:09,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783374804] [2021-06-05 04:31:09,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783374804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:09,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015547341] [2021-06-05 04:31:09,764 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:09,793 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:31:09,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:31:09,794 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 04:31:09,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:10,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:10,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:10,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:10,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:10,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:10,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:10,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:10,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:10,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-05 04:31:10,445 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:10,463 INFO L628 ElimStorePlain]: treesize reduction 155, result has 6.6 percent of original size [2021-06-05 04:31:10,463 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-05 04:31:10,463 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:31:10,463 INFO L518 ElimStorePlain]: Eliminatee v_prenex_227 vanished before elimination [2021-06-05 04:31:10,463 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:31:10,463 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-06-05 04:31:10,494 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:31:10,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015547341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:10,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:10,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 04:31:10,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453095453] [2021-06-05 04:31:10,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:31:10,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:10,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:31:10,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:31:10,495 INFO L87 Difference]: Start difference. First operand 1238 states and 3556 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:11,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:11,514 INFO L93 Difference]: Finished difference Result 1375 states and 3810 transitions. [2021-06-05 04:31:11,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:31:11,514 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:31:11,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:11,516 INFO L225 Difference]: With dead ends: 1375 [2021-06-05 04:31:11,516 INFO L226 Difference]: Without dead ends: 1366 [2021-06-05 04:31:11,516 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1381.6ms TimeCoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:31:11,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1366 states. [2021-06-05 04:31:11,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1366 to 1253. [2021-06-05 04:31:11,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1253 states, 1252 states have (on average 2.876996805111821) internal successors, (3602), 1252 states have internal predecessors, (3602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:11,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1253 states to 1253 states and 3602 transitions. [2021-06-05 04:31:11,528 INFO L78 Accepts]: Start accepts. Automaton has 1253 states and 3602 transitions. Word has length 18 [2021-06-05 04:31:11,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:11,528 INFO L482 AbstractCegarLoop]: Abstraction has 1253 states and 3602 transitions. [2021-06-05 04:31:11,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:11,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1253 states and 3602 transitions. [2021-06-05 04:31:11,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:31:11,529 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:11,529 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:11,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 365 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2751 [2021-06-05 04:31:11,730 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:11,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:11,730 INFO L82 PathProgramCache]: Analyzing trace with hash 2113335308, now seen corresponding path program 361 times [2021-06-05 04:31:11,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:11,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354153831] [2021-06-05 04:31:11,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:11,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:12,410 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:31:12,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:12,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354153831] [2021-06-05 04:31:12,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354153831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:12,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052345695] [2021-06-05 04:31:12,411 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:12,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:12,573 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 04:31:12,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:13,182 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-06-05 04:31:13,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:13,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:13,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:13,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:13,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:13,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:13,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:13,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:13,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-06-05 04:31:13,399 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:13,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:13,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:13,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:13,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:13,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:13,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:13,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:13,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:13,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:13,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 40 [2021-06-05 04:31:13,419 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:13,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:13,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:13,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:13,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:13,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:13,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:13,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:13,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-06-05 04:31:13,429 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:13,444 INFO L628 ElimStorePlain]: treesize reduction 72, result has 13.3 percent of original size [2021-06-05 04:31:13,445 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:31:13,445 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:31:13,445 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:194, output treesize:11 [2021-06-05 04:31:13,488 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:31:13,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052345695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:13,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:13,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 04:31:13,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881299426] [2021-06-05 04:31:13,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:31:13,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:13,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:31:13,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:31:13,489 INFO L87 Difference]: Start difference. First operand 1253 states and 3602 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:14,648 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2021-06-05 04:31:14,828 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2021-06-05 04:31:15,079 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 73 [2021-06-05 04:31:15,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:15,369 INFO L93 Difference]: Finished difference Result 1373 states and 3845 transitions. [2021-06-05 04:31:15,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:31:15,369 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:31:15,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:15,371 INFO L225 Difference]: With dead ends: 1373 [2021-06-05 04:31:15,371 INFO L226 Difference]: Without dead ends: 1367 [2021-06-05 04:31:15,371 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 2599.4ms TimeCoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:31:15,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1367 states. [2021-06-05 04:31:15,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1367 to 1287. [2021-06-05 04:31:15,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1287 states, 1286 states have (on average 2.8833592534992225) internal successors, (3708), 1286 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:15,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1287 states to 1287 states and 3708 transitions. [2021-06-05 04:31:15,383 INFO L78 Accepts]: Start accepts. Automaton has 1287 states and 3708 transitions. Word has length 18 [2021-06-05 04:31:15,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:15,383 INFO L482 AbstractCegarLoop]: Abstraction has 1287 states and 3708 transitions. [2021-06-05 04:31:15,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:15,383 INFO L276 IsEmpty]: Start isEmpty. Operand 1287 states and 3708 transitions. [2021-06-05 04:31:15,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:31:15,384 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:15,384 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:15,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2770,366 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:15,585 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:15,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:15,585 INFO L82 PathProgramCache]: Analyzing trace with hash 631660710, now seen corresponding path program 362 times [2021-06-05 04:31:15,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:15,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856687462] [2021-06-05 04:31:15,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:15,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:16,055 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2021-06-05 04:31:16,187 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2021-06-05 04:31:16,433 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 29 [2021-06-05 04:31:16,502 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:31:16,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:16,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856687462] [2021-06-05 04:31:16,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856687462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:16,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550640680] [2021-06-05 04:31:16,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:16,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:31:16,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:31:16,541 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 04:31:16,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:17,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:17,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:17,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:17,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:17,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:17,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:17,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:17,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:17,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:17,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-05 04:31:17,350 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:17,370 INFO L628 ElimStorePlain]: treesize reduction 155, result has 6.6 percent of original size [2021-06-05 04:31:17,370 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:31:17,370 INFO L518 ElimStorePlain]: Eliminatee v_prenex_230 vanished before elimination [2021-06-05 04:31:17,370 INFO L518 ElimStorePlain]: Eliminatee v_prenex_231 vanished before elimination [2021-06-05 04:31:17,371 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:31:17,371 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-06-05 04:31:17,410 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:31:17,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550640680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:17,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:17,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 04:31:17,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350393652] [2021-06-05 04:31:17,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:31:17,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:17,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:31:17,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:31:17,411 INFO L87 Difference]: Start difference. First operand 1287 states and 3708 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:18,772 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 72 [2021-06-05 04:31:18,979 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 90 [2021-06-05 04:31:19,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:19,310 INFO L93 Difference]: Finished difference Result 1347 states and 3831 transitions. [2021-06-05 04:31:19,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:31:19,310 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:31:19,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:19,312 INFO L225 Difference]: With dead ends: 1347 [2021-06-05 04:31:19,312 INFO L226 Difference]: Without dead ends: 1339 [2021-06-05 04:31:19,312 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 2863.2ms TimeCoverageRelationStatistics Valid=142, Invalid=1264, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 04:31:19,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1339 states. [2021-06-05 04:31:19,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1339 to 1304. [2021-06-05 04:31:19,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1304 states, 1303 states have (on average 2.8848810437452035) internal successors, (3759), 1303 states have internal predecessors, (3759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:19,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1304 states to 1304 states and 3759 transitions. [2021-06-05 04:31:19,324 INFO L78 Accepts]: Start accepts. Automaton has 1304 states and 3759 transitions. Word has length 18 [2021-06-05 04:31:19,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:19,324 INFO L482 AbstractCegarLoop]: Abstraction has 1304 states and 3759 transitions. [2021-06-05 04:31:19,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:19,324 INFO L276 IsEmpty]: Start isEmpty. Operand 1304 states and 3759 transitions. [2021-06-05 04:31:19,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:31:19,325 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:19,325 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:19,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2795,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:19,526 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:19,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:19,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1704746090, now seen corresponding path program 363 times [2021-06-05 04:31:19,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:19,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119600814] [2021-06-05 04:31:19,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:19,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:20,233 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:31:20,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:20,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119600814] [2021-06-05 04:31:20,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119600814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:20,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544403928] [2021-06-05 04:31:20,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:20,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:31:20,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:31:20,265 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 04:31:20,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:20,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:20,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:20,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:20,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:20,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:20,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:20,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:20,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-05 04:31:20,934 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:20,954 INFO L628 ElimStorePlain]: treesize reduction 151, result has 6.8 percent of original size [2021-06-05 04:31:20,954 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:31:20,954 INFO L518 ElimStorePlain]: Eliminatee v_prenex_237 vanished before elimination [2021-06-05 04:31:20,954 INFO L518 ElimStorePlain]: Eliminatee v_prenex_238 vanished before elimination [2021-06-05 04:31:20,954 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:31:20,954 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-06-05 04:31:21,009 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:31:21,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544403928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:21,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:21,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 04:31:21,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553873222] [2021-06-05 04:31:21,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:31:21,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:21,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:31:21,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:31:21,010 INFO L87 Difference]: Start difference. First operand 1304 states and 3759 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:22,216 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2021-06-05 04:31:22,563 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 98 [2021-06-05 04:31:22,827 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 98 [2021-06-05 04:31:23,202 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2021-06-05 04:31:23,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:23,219 INFO L93 Difference]: Finished difference Result 1362 states and 3871 transitions. [2021-06-05 04:31:23,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:31:23,219 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:31:23,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:23,221 INFO L225 Difference]: With dead ends: 1362 [2021-06-05 04:31:23,221 INFO L226 Difference]: Without dead ends: 1354 [2021-06-05 04:31:23,221 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 2868.4ms TimeCoverageRelationStatistics Valid=141, Invalid=1265, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 04:31:23,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2021-06-05 04:31:23,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1314. [2021-06-05 04:31:23,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1314 states, 1313 states have (on average 2.884996191926885) internal successors, (3788), 1313 states have internal predecessors, (3788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:23,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1314 states to 1314 states and 3788 transitions. [2021-06-05 04:31:23,233 INFO L78 Accepts]: Start accepts. Automaton has 1314 states and 3788 transitions. Word has length 18 [2021-06-05 04:31:23,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:23,233 INFO L482 AbstractCegarLoop]: Abstraction has 1314 states and 3788 transitions. [2021-06-05 04:31:23,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:23,233 INFO L276 IsEmpty]: Start isEmpty. Operand 1314 states and 3788 transitions. [2021-06-05 04:31:23,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:31:23,234 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:23,235 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:23,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 368 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2814 [2021-06-05 04:31:23,435 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:23,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:23,435 INFO L82 PathProgramCache]: Analyzing trace with hash 610654502, now seen corresponding path program 364 times [2021-06-05 04:31:23,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:23,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563072558] [2021-06-05 04:31:23,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:23,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:23,623 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:31:23,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:23,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563072558] [2021-06-05 04:31:23,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563072558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:23,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859554165] [2021-06-05 04:31:23,623 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:23,652 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:31:23,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:31:23,653 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 04:31:23,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:24,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:24,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:24,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:24,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:24,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:24,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:24,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:24,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:24,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:24,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-05 04:31:24,313 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:24,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:24,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:24,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:24,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:24,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:24,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:24,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:24,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:24,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-06-05 04:31:24,323 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:24,335 INFO L628 ElimStorePlain]: treesize reduction 116, result has 8.7 percent of original size [2021-06-05 04:31:24,335 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:31:24,335 INFO L518 ElimStorePlain]: Eliminatee v_prenex_246 vanished before elimination [2021-06-05 04:31:24,335 INFO L518 ElimStorePlain]: Eliminatee v_prenex_247 vanished before elimination [2021-06-05 04:31:24,336 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:31:24,336 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-06-05 04:31:24,346 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:31:24,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859554165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:24,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:24,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 04:31:24,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318621332] [2021-06-05 04:31:24,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:31:24,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:24,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:31:24,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:31:24,346 INFO L87 Difference]: Start difference. First operand 1314 states and 3788 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:25,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:25,291 INFO L93 Difference]: Finished difference Result 1470 states and 4103 transitions. [2021-06-05 04:31:25,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:31:25,292 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:31:25,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:25,293 INFO L225 Difference]: With dead ends: 1470 [2021-06-05 04:31:25,294 INFO L226 Difference]: Without dead ends: 1467 [2021-06-05 04:31:25,294 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1164.0ms TimeCoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:31:25,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1467 states. [2021-06-05 04:31:25,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1467 to 1343. [2021-06-05 04:31:25,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1343 states, 1342 states have (on average 2.8934426229508197) internal successors, (3883), 1342 states have internal predecessors, (3883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:25,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1343 states to 1343 states and 3883 transitions. [2021-06-05 04:31:25,306 INFO L78 Accepts]: Start accepts. Automaton has 1343 states and 3883 transitions. Word has length 18 [2021-06-05 04:31:25,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:25,306 INFO L482 AbstractCegarLoop]: Abstraction has 1343 states and 3883 transitions. [2021-06-05 04:31:25,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:25,306 INFO L276 IsEmpty]: Start isEmpty. Operand 1343 states and 3883 transitions. [2021-06-05 04:31:25,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:31:25,308 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:25,308 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:25,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2831,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:25,508 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:25,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:25,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1500373930, now seen corresponding path program 365 times [2021-06-05 04:31:25,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:25,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001338581] [2021-06-05 04:31:25,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:25,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:25,951 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:31:25,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:25,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001338581] [2021-06-05 04:31:25,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001338581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:25,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014243330] [2021-06-05 04:31:25,952 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:25,981 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:31:25,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:31:25,982 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 04:31:25,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:26,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:26,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:26,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:26,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:26,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:26,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:26,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:26,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:26,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:26,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-06-05 04:31:26,712 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:26,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:26,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:26,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:26,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:26,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:26,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:26,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:26,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:26,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-05 04:31:26,724 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:26,738 INFO L628 ElimStorePlain]: treesize reduction 116, result has 8.7 percent of original size [2021-06-05 04:31:26,739 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:31:26,739 INFO L518 ElimStorePlain]: Eliminatee v_prenex_252 vanished before elimination [2021-06-05 04:31:26,739 INFO L518 ElimStorePlain]: Eliminatee v_prenex_253 vanished before elimination [2021-06-05 04:31:26,739 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:31:26,739 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-06-05 04:31:26,777 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:31:26,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014243330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:26,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:26,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 04:31:26,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803159634] [2021-06-05 04:31:26,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:31:26,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:26,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:31:26,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:31:26,778 INFO L87 Difference]: Start difference. First operand 1343 states and 3883 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:28,013 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2021-06-05 04:31:28,320 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 77 [2021-06-05 04:31:28,573 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 78 [2021-06-05 04:31:28,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:28,800 INFO L93 Difference]: Finished difference Result 2052 states and 5791 transitions. [2021-06-05 04:31:28,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:31:28,800 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:31:28,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:28,802 INFO L225 Difference]: With dead ends: 2052 [2021-06-05 04:31:28,802 INFO L226 Difference]: Without dead ends: 2049 [2021-06-05 04:31:28,802 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 2157.2ms TimeCoverageRelationStatistics Valid=146, Invalid=1260, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 04:31:28,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2049 states. [2021-06-05 04:31:28,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2049 to 1345. [2021-06-05 04:31:28,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1345 states, 1344 states have (on average 2.8921130952380953) internal successors, (3887), 1344 states have internal predecessors, (3887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:28,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 3887 transitions. [2021-06-05 04:31:28,816 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 3887 transitions. Word has length 18 [2021-06-05 04:31:28,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:28,817 INFO L482 AbstractCegarLoop]: Abstraction has 1345 states and 3887 transitions. [2021-06-05 04:31:28,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:28,817 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 3887 transitions. [2021-06-05 04:31:28,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:31:28,818 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:28,818 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:29,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2848,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:29,018 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:29,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:29,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1798426888, now seen corresponding path program 366 times [2021-06-05 04:31:29,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:29,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598758616] [2021-06-05 04:31:29,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:29,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:29,213 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:31:29,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:29,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598758616] [2021-06-05 04:31:29,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598758616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:29,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653853205] [2021-06-05 04:31:29,213 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:29,242 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:31:29,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:31:29,243 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 04:31:29,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:29,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:29,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:29,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:29,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:29,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:29,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:29,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:29,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-05 04:31:29,947 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:29,968 INFO L628 ElimStorePlain]: treesize reduction 155, result has 6.6 percent of original size [2021-06-05 04:31:29,968 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:31:29,968 INFO L518 ElimStorePlain]: Eliminatee v_prenex_258 vanished before elimination [2021-06-05 04:31:29,968 INFO L518 ElimStorePlain]: Eliminatee v_prenex_259 vanished before elimination [2021-06-05 04:31:29,968 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:31:29,968 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-06-05 04:31:29,977 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:31:29,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653853205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:29,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:29,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 04:31:29,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588013657] [2021-06-05 04:31:29,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:31:29,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:29,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:31:29,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:31:29,977 INFO L87 Difference]: Start difference. First operand 1345 states and 3887 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:30,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:30,909 INFO L93 Difference]: Finished difference Result 1586 states and 4489 transitions. [2021-06-05 04:31:30,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:31:30,909 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:31:30,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:30,911 INFO L225 Difference]: With dead ends: 1586 [2021-06-05 04:31:30,911 INFO L226 Difference]: Without dead ends: 1583 [2021-06-05 04:31:30,911 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1184.7ms TimeCoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:31:30,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1583 states. [2021-06-05 04:31:30,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1583 to 1345. [2021-06-05 04:31:30,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1345 states, 1344 states have (on average 2.8921130952380953) internal successors, (3887), 1344 states have internal predecessors, (3887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:30,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 3887 transitions. [2021-06-05 04:31:30,931 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 3887 transitions. Word has length 18 [2021-06-05 04:31:30,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:30,931 INFO L482 AbstractCegarLoop]: Abstraction has 1345 states and 3887 transitions. [2021-06-05 04:31:30,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:30,931 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 3887 transitions. [2021-06-05 04:31:30,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:31:30,932 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:30,932 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:31,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2867 [2021-06-05 04:31:31,133 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:31,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:31,133 INFO L82 PathProgramCache]: Analyzing trace with hash 166479722, now seen corresponding path program 367 times [2021-06-05 04:31:31,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:31,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825903561] [2021-06-05 04:31:31,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:31,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:31,679 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:31:31,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:31,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825903561] [2021-06-05 04:31:31,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825903561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:31,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113650225] [2021-06-05 04:31:31,679 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:31,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:31,709 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 04:31:31,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:32,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:32,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:32,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:32,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:32,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:32,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:32,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:32,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:32,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:32,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:32,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:32,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-06-05 04:31:32,438 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:32,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:32,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:32,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:32,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:32,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:32,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:32,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:32,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:32,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:32,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:32,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-05 04:31:32,451 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:32,510 INFO L628 ElimStorePlain]: treesize reduction 95, result has 46.6 percent of original size [2021-06-05 04:31:32,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:32,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 04:31:32,515 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:32,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:32,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:32,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:32,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:32,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:32,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:32,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:32,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 27 [2021-06-05 04:31:32,547 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:32,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:32,560 INFO L518 ElimStorePlain]: Eliminatee v_prenex_265 vanished before elimination [2021-06-05 04:31:32,561 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:31:32,561 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:257, output treesize:22 [2021-06-05 04:31:32,616 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:31:32,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113650225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:32,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:32,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 04:31:32,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453215769] [2021-06-05 04:31:32,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:31:32,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:32,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:31:32,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=458, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:31:32,617 INFO L87 Difference]: Start difference. First operand 1345 states and 3887 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:33,469 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 73 [2021-06-05 04:31:33,644 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 68 [2021-06-05 04:31:33,863 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 72 [2021-06-05 04:31:34,051 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 85 [2021-06-05 04:31:34,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:34,678 INFO L93 Difference]: Finished difference Result 1603 states and 4518 transitions. [2021-06-05 04:31:34,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:31:34,679 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:31:34,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:34,680 INFO L225 Difference]: With dead ends: 1603 [2021-06-05 04:31:34,680 INFO L226 Difference]: Without dead ends: 1594 [2021-06-05 04:31:34,680 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 2526.6ms TimeCoverageRelationStatistics Valid=127, Invalid=1279, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 04:31:34,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1594 states. [2021-06-05 04:31:34,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1594 to 1353. [2021-06-05 04:31:34,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1353 states, 1352 states have (on average 2.8920118343195265) internal successors, (3910), 1352 states have internal predecessors, (3910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:34,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1353 states to 1353 states and 3910 transitions. [2021-06-05 04:31:34,694 INFO L78 Accepts]: Start accepts. Automaton has 1353 states and 3910 transitions. Word has length 18 [2021-06-05 04:31:34,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:34,694 INFO L482 AbstractCegarLoop]: Abstraction has 1353 states and 3910 transitions. [2021-06-05 04:31:34,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:34,694 INFO L276 IsEmpty]: Start isEmpty. Operand 1353 states and 3910 transitions. [2021-06-05 04:31:34,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:31:34,696 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:34,696 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:34,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2886,372 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:34,896 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:34,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:34,896 INFO L82 PathProgramCache]: Analyzing trace with hash -994542392, now seen corresponding path program 368 times [2021-06-05 04:31:34,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:34,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750418548] [2021-06-05 04:31:34,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:34,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:35,258 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:31:35,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:35,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750418548] [2021-06-05 04:31:35,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750418548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:35,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759060102] [2021-06-05 04:31:35,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:35,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:31:35,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:31:35,289 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 04:31:35,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:35,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:35,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:35,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:35,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:35,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:35,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:35,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:35,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:35,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-06-05 04:31:35,962 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:35,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:35,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:35,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:35,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:35,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:35,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:35,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:35,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-05 04:31:35,971 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:35,984 INFO L628 ElimStorePlain]: treesize reduction 110, result has 9.1 percent of original size [2021-06-05 04:31:35,984 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:31:35,984 INFO L518 ElimStorePlain]: Eliminatee v_prenex_267 vanished before elimination [2021-06-05 04:31:35,984 INFO L518 ElimStorePlain]: Eliminatee v_prenex_268 vanished before elimination [2021-06-05 04:31:35,984 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:31:35,985 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-06-05 04:31:36,022 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:31:36,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759060102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:36,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:36,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 04:31:36,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446542993] [2021-06-05 04:31:36,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:31:36,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:36,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:31:36,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:31:36,023 INFO L87 Difference]: Start difference. First operand 1353 states and 3910 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:37,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:37,409 INFO L93 Difference]: Finished difference Result 1627 states and 4563 transitions. [2021-06-05 04:31:37,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:31:37,409 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:31:37,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:37,411 INFO L225 Difference]: With dead ends: 1627 [2021-06-05 04:31:37,411 INFO L226 Difference]: Without dead ends: 1618 [2021-06-05 04:31:37,411 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1680.6ms TimeCoverageRelationStatistics Valid=150, Invalid=1110, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 04:31:37,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1618 states. [2021-06-05 04:31:37,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1618 to 1349. [2021-06-05 04:31:37,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1349 states, 1348 states have (on average 2.8939169139465877) internal successors, (3901), 1348 states have internal predecessors, (3901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:37,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1349 states to 1349 states and 3901 transitions. [2021-06-05 04:31:37,434 INFO L78 Accepts]: Start accepts. Automaton has 1349 states and 3901 transitions. Word has length 18 [2021-06-05 04:31:37,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:37,434 INFO L482 AbstractCegarLoop]: Abstraction has 1349 states and 3901 transitions. [2021-06-05 04:31:37,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:37,434 INFO L276 IsEmpty]: Start isEmpty. Operand 1349 states and 3901 transitions. [2021-06-05 04:31:37,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:31:37,435 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:37,435 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:37,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2906,373 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:37,636 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:37,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:37,637 INFO L82 PathProgramCache]: Analyzing trace with hash -754900054, now seen corresponding path program 369 times [2021-06-05 04:31:37,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:37,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293277786] [2021-06-05 04:31:37,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:37,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:37,924 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:31:37,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:37,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293277786] [2021-06-05 04:31:37,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293277786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:37,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507356474] [2021-06-05 04:31:37,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:37,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:31:37,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:31:37,956 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 04:31:37,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:38,686 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-06-05 04:31:38,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:38,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:38,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:38,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:38,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:38,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:38,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:38,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:38,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:38,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:38,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:38,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-06-05 04:31:38,866 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:38,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:38,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:38,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:38,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:38,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:38,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:38,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:38,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:38,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:38,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:38,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-05 04:31:38,878 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:38,943 INFO L628 ElimStorePlain]: treesize reduction 174, result has 33.8 percent of original size [2021-06-05 04:31:38,943 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-05 04:31:38,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:38,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:38,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:38,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:38,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:38,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:38,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 27 [2021-06-05 04:31:38,951 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:38,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:38,967 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:31:38,967 INFO L518 ElimStorePlain]: Eliminatee v_prenex_273 vanished before elimination [2021-06-05 04:31:38,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:38,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:31:38,970 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:31:38,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:38,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:31:38,987 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 9 variables, input treesize:352, output treesize:31 [2021-06-05 04:31:39,025 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:31:39,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507356474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:39,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:39,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 04:31:39,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540710806] [2021-06-05 04:31:39,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:31:39,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:39,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:31:39,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:31:39,026 INFO L87 Difference]: Start difference. First operand 1349 states and 3901 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:40,001 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-06-05 04:31:40,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:40,168 INFO L93 Difference]: Finished difference Result 1668 states and 4648 transitions. [2021-06-05 04:31:40,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:31:40,168 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:31:40,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:40,170 INFO L225 Difference]: With dead ends: 1668 [2021-06-05 04:31:40,170 INFO L226 Difference]: Without dead ends: 1661 [2021-06-05 04:31:40,170 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 1692.9ms TimeCoverageRelationStatistics Valid=148, Invalid=974, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 04:31:40,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1661 states. [2021-06-05 04:31:40,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1661 to 1359. [2021-06-05 04:31:40,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1359 states, 1358 states have (on average 2.901325478645066) internal successors, (3940), 1358 states have internal predecessors, (3940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:40,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1359 states to 1359 states and 3940 transitions. [2021-06-05 04:31:40,184 INFO L78 Accepts]: Start accepts. Automaton has 1359 states and 3940 transitions. Word has length 18 [2021-06-05 04:31:40,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:40,184 INFO L482 AbstractCegarLoop]: Abstraction has 1359 states and 3940 transitions. [2021-06-05 04:31:40,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:40,184 INFO L276 IsEmpty]: Start isEmpty. Operand 1359 states and 3940 transitions. [2021-06-05 04:31:40,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:31:40,186 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:40,186 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:40,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2925 [2021-06-05 04:31:40,389 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:40,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:40,389 INFO L82 PathProgramCache]: Analyzing trace with hash -747169656, now seen corresponding path program 370 times [2021-06-05 04:31:40,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:40,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630494668] [2021-06-05 04:31:40,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:40,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:40,613 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:31:40,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:40,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630494668] [2021-06-05 04:31:40,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630494668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:40,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080897200] [2021-06-05 04:31:40,613 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:40,642 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:31:40,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:31:40,643 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 04:31:40,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:41,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:41,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:41,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:41,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:41,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:41,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:41,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:41,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:41,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:41,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:41,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 40 [2021-06-05 04:31:41,308 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:41,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:41,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:41,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:41,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:41,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:41,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:41,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:41,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:41,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:41,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:41,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-06-05 04:31:41,328 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:41,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:41,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:41,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:41,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:41,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:41,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:41,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:41,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:41,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:41,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-06-05 04:31:41,340 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:41,357 INFO L628 ElimStorePlain]: treesize reduction 76, result has 12.6 percent of original size [2021-06-05 04:31:41,357 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:31:41,357 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:31:41,358 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:194, output treesize:11 [2021-06-05 04:31:41,395 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:31:41,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080897200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:41,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:41,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 04:31:41,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915309443] [2021-06-05 04:31:41,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:31:41,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:41,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:31:41,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:31:41,404 INFO L87 Difference]: Start difference. First operand 1359 states and 3940 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:42,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:42,970 INFO L93 Difference]: Finished difference Result 1670 states and 4656 transitions. [2021-06-05 04:31:42,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 04:31:42,971 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:31:42,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:42,974 INFO L225 Difference]: With dead ends: 1670 [2021-06-05 04:31:42,974 INFO L226 Difference]: Without dead ends: 1666 [2021-06-05 04:31:42,974 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 1716.6ms TimeCoverageRelationStatistics Valid=167, Invalid=1393, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 04:31:42,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1666 states. [2021-06-05 04:31:42,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1666 to 1322. [2021-06-05 04:31:42,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1322 states, 1321 states have (on average 2.9084027252081754) internal successors, (3842), 1321 states have internal predecessors, (3842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:42,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1322 states to 1322 states and 3842 transitions. [2021-06-05 04:31:42,991 INFO L78 Accepts]: Start accepts. Automaton has 1322 states and 3842 transitions. Word has length 18 [2021-06-05 04:31:42,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:42,991 INFO L482 AbstractCegarLoop]: Abstraction has 1322 states and 3842 transitions. [2021-06-05 04:31:42,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:42,991 INFO L276 IsEmpty]: Start isEmpty. Operand 1322 states and 3842 transitions. [2021-06-05 04:31:42,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:31:42,992 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:42,992 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:43,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2965,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:43,193 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:43,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:43,193 INFO L82 PathProgramCache]: Analyzing trace with hash -806597504, now seen corresponding path program 371 times [2021-06-05 04:31:43,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:43,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415990072] [2021-06-05 04:31:43,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:43,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:43,567 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:31:43,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:43,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415990072] [2021-06-05 04:31:43,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415990072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:43,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923801385] [2021-06-05 04:31:43,567 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:43,598 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:31:43,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:31:43,599 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 04:31:43,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:44,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:44,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:44,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:44,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:44,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:44,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:44,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:44,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:44,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:44,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:44,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:44,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-05 04:31:44,304 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:44,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:44,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:44,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:44,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:44,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:44,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:44,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:44,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:44,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:44,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:44,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-06-05 04:31:44,315 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:44,327 INFO L628 ElimStorePlain]: treesize reduction 110, result has 9.1 percent of original size [2021-06-05 04:31:44,327 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:31:44,327 INFO L518 ElimStorePlain]: Eliminatee v_prenex_277 vanished before elimination [2021-06-05 04:31:44,327 INFO L518 ElimStorePlain]: Eliminatee v_prenex_278 vanished before elimination [2021-06-05 04:31:44,328 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:31:44,328 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-06-05 04:31:44,356 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:31:44,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923801385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:44,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:44,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 04:31:44,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824905361] [2021-06-05 04:31:44,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:31:44,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:44,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:31:44,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:31:44,357 INFO L87 Difference]: Start difference. First operand 1322 states and 3842 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:45,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:45,132 INFO L93 Difference]: Finished difference Result 1425 states and 4085 transitions. [2021-06-05 04:31:45,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:31:45,132 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:31:45,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:45,134 INFO L225 Difference]: With dead ends: 1425 [2021-06-05 04:31:45,134 INFO L226 Difference]: Without dead ends: 1418 [2021-06-05 04:31:45,134 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1264.7ms TimeCoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:31:45,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1418 states. [2021-06-05 04:31:45,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1418 to 1325. [2021-06-05 04:31:45,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1325 states, 1324 states have (on average 2.906344410876133) internal successors, (3848), 1324 states have internal predecessors, (3848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:45,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1325 states to 1325 states and 3848 transitions. [2021-06-05 04:31:45,146 INFO L78 Accepts]: Start accepts. Automaton has 1325 states and 3848 transitions. Word has length 18 [2021-06-05 04:31:45,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:45,146 INFO L482 AbstractCegarLoop]: Abstraction has 1325 states and 3848 transitions. [2021-06-05 04:31:45,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:45,146 INFO L276 IsEmpty]: Start isEmpty. Operand 1325 states and 3848 transitions. [2021-06-05 04:31:45,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:31:45,147 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:45,147 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:45,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2995 [2021-06-05 04:31:45,348 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:45,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:45,348 INFO L82 PathProgramCache]: Analyzing trace with hash 695400512, now seen corresponding path program 372 times [2021-06-05 04:31:45,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:45,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530527177] [2021-06-05 04:31:45,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:45,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:45,623 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:31:45,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:45,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530527177] [2021-06-05 04:31:45,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530527177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:45,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543621373] [2021-06-05 04:31:45,624 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:45,654 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:31:45,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:31:45,655 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 04:31:45,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:46,288 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-06-05 04:31:46,493 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 93 [2021-06-05 04:31:46,630 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:31:46,631 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:46,646 INFO L628 ElimStorePlain]: treesize reduction 277, result has 3.8 percent of original size [2021-06-05 04:31:46,646 INFO L518 ElimStorePlain]: Eliminatee v_prenex_291 vanished before elimination [2021-06-05 04:31:46,646 INFO L518 ElimStorePlain]: Eliminatee v_prenex_292 vanished before elimination [2021-06-05 04:31:46,646 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-05 04:31:46,646 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:31:46,646 INFO L518 ElimStorePlain]: Eliminatee v_prenex_284 vanished before elimination [2021-06-05 04:31:46,646 INFO L518 ElimStorePlain]: Eliminatee v_prenex_285 vanished before elimination [2021-06-05 04:31:46,646 INFO L518 ElimStorePlain]: Eliminatee v_prenex_286 vanished before elimination [2021-06-05 04:31:46,646 INFO L518 ElimStorePlain]: Eliminatee v_prenex_287 vanished before elimination [2021-06-05 04:31:46,646 INFO L518 ElimStorePlain]: Eliminatee v_prenex_289 vanished before elimination [2021-06-05 04:31:46,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 10 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:31:46,646 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 15 variables, input treesize:360, output treesize:11 [2021-06-05 04:31:46,655 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:31:46,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543621373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:46,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:46,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 04:31:46,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258918238] [2021-06-05 04:31:46,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:31:46,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:46,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:31:46,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:31:46,655 INFO L87 Difference]: Start difference. First operand 1325 states and 3848 transitions. Second operand has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:47,586 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2021-06-05 04:31:47,758 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 101 [2021-06-05 04:31:47,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:47,845 INFO L93 Difference]: Finished difference Result 1437 states and 4095 transitions. [2021-06-05 04:31:47,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:31:47,846 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:31:47,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:47,847 INFO L225 Difference]: With dead ends: 1437 [2021-06-05 04:31:47,847 INFO L226 Difference]: Without dead ends: 1432 [2021-06-05 04:31:47,847 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 1689.1ms TimeCoverageRelationStatistics Valid=129, Invalid=863, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:31:47,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1432 states. [2021-06-05 04:31:47,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1432 to 1325. [2021-06-05 04:31:47,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1325 states, 1324 states have (on average 2.906344410876133) internal successors, (3848), 1324 states have internal predecessors, (3848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:47,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1325 states to 1325 states and 3848 transitions. [2021-06-05 04:31:47,859 INFO L78 Accepts]: Start accepts. Automaton has 1325 states and 3848 transitions. Word has length 18 [2021-06-05 04:31:47,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:47,859 INFO L482 AbstractCegarLoop]: Abstraction has 1325 states and 3848 transitions. [2021-06-05 04:31:47,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:47,859 INFO L276 IsEmpty]: Start isEmpty. Operand 1325 states and 3848 transitions. [2021-06-05 04:31:47,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:31:47,861 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:47,861 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:48,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3015,377 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:48,061 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:48,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:48,061 INFO L82 PathProgramCache]: Analyzing trace with hash 935042850, now seen corresponding path program 373 times [2021-06-05 04:31:48,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:48,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034837466] [2021-06-05 04:31:48,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:48,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:48,275 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:31:48,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:48,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034837466] [2021-06-05 04:31:48,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034837466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:48,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871984811] [2021-06-05 04:31:48,275 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:48,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:48,305 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 04:31:48,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:48,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:48,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:48,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:48,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:48,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:48,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:48,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:48,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:48,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:49,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:49,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:49,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-05 04:31:49,008 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:49,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:49,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:49,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:49,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:49,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:49,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:49,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:49,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:49,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:49,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:49,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-06-05 04:31:49,019 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:49,033 INFO L628 ElimStorePlain]: treesize reduction 106, result has 9.4 percent of original size [2021-06-05 04:31:49,033 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:31:49,033 INFO L518 ElimStorePlain]: Eliminatee v_prenex_295 vanished before elimination [2021-06-05 04:31:49,033 INFO L518 ElimStorePlain]: Eliminatee v_prenex_296 vanished before elimination [2021-06-05 04:31:49,033 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:31:49,033 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-06-05 04:31:49,060 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:31:49,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871984811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:49,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:49,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 04:31:49,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807833443] [2021-06-05 04:31:49,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:31:49,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:49,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:31:49,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:31:49,061 INFO L87 Difference]: Start difference. First operand 1325 states and 3848 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:50,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:50,033 INFO L93 Difference]: Finished difference Result 1489 states and 4198 transitions. [2021-06-05 04:31:50,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:31:50,034 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:31:50,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:50,035 INFO L225 Difference]: With dead ends: 1489 [2021-06-05 04:31:50,035 INFO L226 Difference]: Without dead ends: 1485 [2021-06-05 04:31:50,035 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1367.4ms TimeCoverageRelationStatistics Valid=129, Invalid=863, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:31:50,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1485 states. [2021-06-05 04:31:50,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1485 to 1342. [2021-06-05 04:31:50,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1342 states, 1341 states have (on average 2.9157345264727814) internal successors, (3910), 1341 states have internal predecessors, (3910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:50,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1342 states to 1342 states and 3910 transitions. [2021-06-05 04:31:50,047 INFO L78 Accepts]: Start accepts. Automaton has 1342 states and 3910 transitions. Word has length 18 [2021-06-05 04:31:50,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:50,047 INFO L482 AbstractCegarLoop]: Abstraction has 1342 states and 3910 transitions. [2021-06-05 04:31:50,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:50,048 INFO L276 IsEmpty]: Start isEmpty. Operand 1342 states and 3910 transitions. [2021-06-05 04:31:50,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:31:50,049 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:50,049 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:50,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3035,378 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:50,249 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:50,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:50,249 INFO L82 PathProgramCache]: Analyzing trace with hash 942773248, now seen corresponding path program 374 times [2021-06-05 04:31:50,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:50,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500109479] [2021-06-05 04:31:50,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:50,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:50,443 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:31:50,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:50,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500109479] [2021-06-05 04:31:50,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500109479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:50,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443772954] [2021-06-05 04:31:50,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:50,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:31:50,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:31:50,473 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 04:31:50,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:51,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:51,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:51,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:51,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:51,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:51,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:51,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:51,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:51,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:51,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:51,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:51,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-05 04:31:51,096 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:51,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:51,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:51,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:51,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:51,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:51,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:51,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:51,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:51,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:51,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:51,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:51,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 48 [2021-06-05 04:31:51,113 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:51,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:51,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:51,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:51,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:51,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:51,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:51,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:51,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:51,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:51,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:51,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:51,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 32 [2021-06-05 04:31:51,130 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:51,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:51,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:51,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:51,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:51,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:51,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:51,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:51,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:51,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:51,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:51,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-05 04:31:51,141 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:51,208 INFO L628 ElimStorePlain]: treesize reduction 109, result has 40.1 percent of original size [2021-06-05 04:31:51,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:51,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:31:51,212 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:31:51,240 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:51,241 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:31:51,241 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:345, output treesize:56 [2021-06-05 04:31:51,321 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:31:51,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443772954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:51,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:51,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 04:31:51,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18321865] [2021-06-05 04:31:51,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:31:51,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:51,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:31:51,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:31:51,322 INFO L87 Difference]: Start difference. First operand 1342 states and 3910 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:52,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:52,301 INFO L93 Difference]: Finished difference Result 1512 states and 4276 transitions. [2021-06-05 04:31:52,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:31:52,301 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:31:52,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:52,303 INFO L225 Difference]: With dead ends: 1512 [2021-06-05 04:31:52,303 INFO L226 Difference]: Without dead ends: 1506 [2021-06-05 04:31:52,303 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 1199.1ms TimeCoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:31:52,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2021-06-05 04:31:52,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1337. [2021-06-05 04:31:52,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1337 states, 1336 states have (on average 2.9154191616766467) internal successors, (3895), 1336 states have internal predecessors, (3895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:52,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1337 states to 1337 states and 3895 transitions. [2021-06-05 04:31:52,315 INFO L78 Accepts]: Start accepts. Automaton has 1337 states and 3895 transitions. Word has length 18 [2021-06-05 04:31:52,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:52,315 INFO L482 AbstractCegarLoop]: Abstraction has 1337 states and 3895 transitions. [2021-06-05 04:31:52,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:52,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1337 states and 3895 transitions. [2021-06-05 04:31:52,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:31:52,317 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:52,317 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:52,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3054,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:52,517 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:52,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:52,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1995645530, now seen corresponding path program 375 times [2021-06-05 04:31:52,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:52,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051671956] [2021-06-05 04:31:52,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:52,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:53,061 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:31:53,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:53,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051671956] [2021-06-05 04:31:53,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051671956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:53,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908509624] [2021-06-05 04:31:53,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:53,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:31:53,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:31:53,091 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 04:31:53,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:53,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:53,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:53,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:53,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:53,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:53,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:53,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:53,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:53,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:53,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:53,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-06-05 04:31:53,819 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:53,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:53,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:53,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:53,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:53,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:53,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:53,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:53,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:53,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:53,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-05 04:31:53,830 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:53,875 INFO L628 ElimStorePlain]: treesize reduction 95, result has 46.6 percent of original size [2021-06-05 04:31:53,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:53,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 04:31:53,879 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:53,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:53,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:53,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:53,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:53,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:53,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:53,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:53,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 27 [2021-06-05 04:31:53,903 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:53,913 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:31:53,913 INFO L518 ElimStorePlain]: Eliminatee v_prenex_303 vanished before elimination [2021-06-05 04:31:53,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:31:53,914 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:257, output treesize:22 [2021-06-05 04:31:53,956 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:31:53,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908509624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:53,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:53,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 04:31:53,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567462313] [2021-06-05 04:31:53,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:31:53,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:53,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:31:53,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=458, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:31:53,956 INFO L87 Difference]: Start difference. First operand 1337 states and 3895 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:55,285 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2021-06-05 04:31:55,602 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 77 [2021-06-05 04:31:55,959 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 78 [2021-06-05 04:31:56,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:56,175 INFO L93 Difference]: Finished difference Result 1452 states and 4160 transitions. [2021-06-05 04:31:56,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:31:56,176 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:31:56,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:56,177 INFO L225 Difference]: With dead ends: 1452 [2021-06-05 04:31:56,177 INFO L226 Difference]: Without dead ends: 1439 [2021-06-05 04:31:56,177 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 2646.0ms TimeCoverageRelationStatistics Valid=143, Invalid=1339, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 04:31:56,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1439 states. [2021-06-05 04:31:56,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1439 to 1339. [2021-06-05 04:31:56,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1339 states, 1338 states have (on average 2.914050822122571) internal successors, (3899), 1338 states have internal predecessors, (3899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:56,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1339 states to 1339 states and 3899 transitions. [2021-06-05 04:31:56,190 INFO L78 Accepts]: Start accepts. Automaton has 1339 states and 3899 transitions. Word has length 18 [2021-06-05 04:31:56,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:56,190 INFO L482 AbstractCegarLoop]: Abstraction has 1339 states and 3899 transitions. [2021-06-05 04:31:56,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:56,190 INFO L276 IsEmpty]: Start isEmpty. Operand 1339 states and 3899 transitions. [2021-06-05 04:31:56,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:31:56,191 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:56,191 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:56,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 380 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3076 [2021-06-05 04:31:56,392 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:56,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:56,392 INFO L82 PathProgramCache]: Analyzing trace with hash 44208064, now seen corresponding path program 376 times [2021-06-05 04:31:56,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:56,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657105135] [2021-06-05 04:31:56,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:56,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:56,792 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:31:56,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:56,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657105135] [2021-06-05 04:31:56,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657105135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:56,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203655677] [2021-06-05 04:31:56,792 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:56,822 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:31:56,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:31:56,823 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 04:31:56,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:31:57,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:57,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:57,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:57,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:57,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:57,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:57,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:57,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:57,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:57,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:57,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:57,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-05 04:31:57,519 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:57,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:57,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:57,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:57,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:57,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:57,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:57,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:57,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:57,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:31:57,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:31:57,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-06-05 04:31:57,530 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:31:57,543 INFO L628 ElimStorePlain]: treesize reduction 110, result has 9.1 percent of original size [2021-06-05 04:31:57,543 INFO L518 ElimStorePlain]: Eliminatee v_prenex_308 vanished before elimination [2021-06-05 04:31:57,543 INFO L518 ElimStorePlain]: Eliminatee v_prenex_309 vanished before elimination [2021-06-05 04:31:57,543 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:31:57,543 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:31:57,544 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-06-05 04:31:57,571 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:31:57,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203655677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:57,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:31:57,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 04:31:57,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092097457] [2021-06-05 04:31:57,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:31:57,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:31:57,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:31:57,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:31:57,572 INFO L87 Difference]: Start difference. First operand 1339 states and 3899 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:58,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:31:58,837 INFO L93 Difference]: Finished difference Result 1529 states and 4308 transitions. [2021-06-05 04:31:58,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:31:58,838 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:31:58,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:31:58,839 INFO L225 Difference]: With dead ends: 1529 [2021-06-05 04:31:58,839 INFO L226 Difference]: Without dead ends: 1514 [2021-06-05 04:31:58,839 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 1738.1ms TimeCoverageRelationStatistics Valid=158, Invalid=1032, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:31:58,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1514 states. [2021-06-05 04:31:58,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1514 to 1367. [2021-06-05 04:31:58,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1367 states, 1366 states have (on average 2.9128843338213763) internal successors, (3979), 1366 states have internal predecessors, (3979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:58,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1367 states to 1367 states and 3979 transitions. [2021-06-05 04:31:58,852 INFO L78 Accepts]: Start accepts. Automaton has 1367 states and 3979 transitions. Word has length 18 [2021-06-05 04:31:58,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:31:58,852 INFO L482 AbstractCegarLoop]: Abstraction has 1367 states and 3979 transitions. [2021-06-05 04:31:58,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:31:58,852 INFO L276 IsEmpty]: Start isEmpty. Operand 1367 states and 3979 transitions. [2021-06-05 04:31:58,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:31:58,853 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:31:58,853 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:31:59,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 381 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3096 [2021-06-05 04:31:59,054 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:31:59,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:31:59,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1356935782, now seen corresponding path program 377 times [2021-06-05 04:31:59,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:31:59,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766054436] [2021-06-05 04:31:59,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:31:59,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:31:59,338 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:31:59,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:31:59,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766054436] [2021-06-05 04:31:59,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766054436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:31:59,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159195102] [2021-06-05 04:31:59,338 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:31:59,368 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:31:59,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:31:59,369 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 04:31:59,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:00,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:00,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:00,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:00,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:00,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:00,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:00,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:00,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:00,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:00,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:00,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-06-05 04:32:00,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:00,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:00,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:00,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:00,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:00,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:00,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:00,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:00,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:00,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:00,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 40 [2021-06-05 04:32:00,135 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:00,148 INFO L628 ElimStorePlain]: treesize reduction 112, result has 8.9 percent of original size [2021-06-05 04:32:00,148 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:32:00,148 INFO L518 ElimStorePlain]: Eliminatee v_prenex_311 vanished before elimination [2021-06-05 04:32:00,148 INFO L518 ElimStorePlain]: Eliminatee v_prenex_312 vanished before elimination [2021-06-05 04:32:00,148 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:32:00,148 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:194, output treesize:11 [2021-06-05 04:32:00,175 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:00,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159195102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:00,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:00,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 04:32:00,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519527554] [2021-06-05 04:32:00,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:32:00,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:00,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:32:00,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:32:00,175 INFO L87 Difference]: Start difference. First operand 1367 states and 3979 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:01,435 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2021-06-05 04:32:01,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:01,573 INFO L93 Difference]: Finished difference Result 1527 states and 4324 transitions. [2021-06-05 04:32:01,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:32:01,573 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:32:01,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:01,575 INFO L225 Difference]: With dead ends: 1527 [2021-06-05 04:32:01,575 INFO L226 Difference]: Without dead ends: 1524 [2021-06-05 04:32:01,575 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 1824.1ms TimeCoverageRelationStatistics Valid=164, Invalid=1168, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 04:32:01,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1524 states. [2021-06-05 04:32:01,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1524 to 1398. [2021-06-05 04:32:01,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1398 states, 1397 states have (on average 2.9098067287043663) internal successors, (4065), 1397 states have internal predecessors, (4065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:01,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 4065 transitions. [2021-06-05 04:32:01,588 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 4065 transitions. Word has length 18 [2021-06-05 04:32:01,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:01,588 INFO L482 AbstractCegarLoop]: Abstraction has 1398 states and 4065 transitions. [2021-06-05 04:32:01,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:01,588 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 4065 transitions. [2021-06-05 04:32:01,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:32:01,589 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:01,589 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:01,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3116,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:01,790 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:01,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:01,790 INFO L82 PathProgramCache]: Analyzing trace with hash -124738816, now seen corresponding path program 378 times [2021-06-05 04:32:01,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:01,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161445902] [2021-06-05 04:32:01,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:01,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:02,003 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:02,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:02,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161445902] [2021-06-05 04:32:02,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161445902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:02,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297290726] [2021-06-05 04:32:02,004 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:02,037 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:32:02,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:02,038 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 04:32:02,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:02,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:02,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:02,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:02,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:02,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:02,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:02,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:02,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:02,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2021-06-05 04:32:02,677 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:02,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:02,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:02,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:02,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:02,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:02,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:02,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:02,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 44 [2021-06-05 04:32:02,691 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:02,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:02,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:02,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:02,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:02,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:02,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:02,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:02,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 36 [2021-06-05 04:32:02,705 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:02,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:02,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:02,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:02,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:02,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:02,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:02,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:02,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 36 [2021-06-05 04:32:02,714 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:02,782 INFO L628 ElimStorePlain]: treesize reduction 101, result has 40.6 percent of original size [2021-06-05 04:32:02,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:02,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:32:02,786 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:32:02,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:32:02,816 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:32:02,816 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:305, output treesize:48 [2021-06-05 04:32:02,895 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:02,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297290726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:02,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:02,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 04:32:02,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803877661] [2021-06-05 04:32:02,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:32:02,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:02,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:32:02,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:32:02,896 INFO L87 Difference]: Start difference. First operand 1398 states and 4065 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:04,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:04,107 INFO L93 Difference]: Finished difference Result 1627 states and 4586 transitions. [2021-06-05 04:32:04,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 04:32:04,107 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:32:04,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:04,109 INFO L225 Difference]: With dead ends: 1627 [2021-06-05 04:32:04,109 INFO L226 Difference]: Without dead ends: 1619 [2021-06-05 04:32:04,109 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 1568.7ms TimeCoverageRelationStatistics Valid=169, Invalid=1237, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 04:32:04,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1619 states. [2021-06-05 04:32:04,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1619 to 1442. [2021-06-05 04:32:04,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 2.9222761970853575) internal successors, (4211), 1441 states have internal predecessors, (4211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:04,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 4211 transitions. [2021-06-05 04:32:04,122 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 4211 transitions. Word has length 18 [2021-06-05 04:32:04,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:04,123 INFO L482 AbstractCegarLoop]: Abstraction has 1442 states and 4211 transitions. [2021-06-05 04:32:04,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:04,123 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 4211 transitions. [2021-06-05 04:32:04,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:32:04,124 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:04,124 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:04,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3134,383 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:04,324 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:04,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:04,325 INFO L82 PathProgramCache]: Analyzing trace with hash 42024968, now seen corresponding path program 379 times [2021-06-05 04:32:04,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:04,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172433561] [2021-06-05 04:32:04,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:04,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:04,968 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:04,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:04,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172433561] [2021-06-05 04:32:04,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172433561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:04,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609412406] [2021-06-05 04:32:04,971 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:05,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:05,007 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 04:32:05,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:05,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:05,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:05,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:05,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:05,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:05,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:05,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:05,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:05,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:05,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:05,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:05,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-06-05 04:32:05,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:05,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:05,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:05,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:05,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:05,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:05,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:05,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:05,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:05,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:05,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:05,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-05 04:32:05,739 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:05,751 INFO L628 ElimStorePlain]: treesize reduction 110, result has 9.1 percent of original size [2021-06-05 04:32:05,751 INFO L518 ElimStorePlain]: Eliminatee v_prenex_319 vanished before elimination [2021-06-05 04:32:05,751 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-05 04:32:05,751 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:32:05,752 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:32:05,752 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-06-05 04:32:05,782 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:05,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609412406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:05,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:05,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 04:32:05,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385510816] [2021-06-05 04:32:05,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:32:05,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:05,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:32:05,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:32:05,783 INFO L87 Difference]: Start difference. First operand 1442 states and 4211 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:06,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:06,913 INFO L93 Difference]: Finished difference Result 1508 states and 4349 transitions. [2021-06-05 04:32:06,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:32:06,914 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:32:06,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:06,915 INFO L225 Difference]: With dead ends: 1508 [2021-06-05 04:32:06,915 INFO L226 Difference]: Without dead ends: 1498 [2021-06-05 04:32:06,916 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1793.4ms TimeCoverageRelationStatistics Valid=103, Invalid=889, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:32:06,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1498 states. [2021-06-05 04:32:06,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1498 to 1443. [2021-06-05 04:32:06,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1443 states, 1442 states have (on average 2.921636615811373) internal successors, (4213), 1442 states have internal predecessors, (4213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:06,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1443 states to 1443 states and 4213 transitions. [2021-06-05 04:32:06,928 INFO L78 Accepts]: Start accepts. Automaton has 1443 states and 4213 transitions. Word has length 18 [2021-06-05 04:32:06,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:06,929 INFO L482 AbstractCegarLoop]: Abstraction has 1443 states and 4213 transitions. [2021-06-05 04:32:06,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:06,929 INFO L276 IsEmpty]: Start isEmpty. Operand 1443 states and 4213 transitions. [2021-06-05 04:32:06,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:32:06,930 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:06,930 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:07,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3156,384 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:07,130 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:07,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:07,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1544022984, now seen corresponding path program 380 times [2021-06-05 04:32:07,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:07,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128454555] [2021-06-05 04:32:07,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:07,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:07,358 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:07,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:07,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128454555] [2021-06-05 04:32:07,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128454555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:07,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312015402] [2021-06-05 04:32:07,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:07,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:32:07,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:07,390 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 04:32:07,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:08,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:08,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:08,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:08,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:08,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:08,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:08,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:08,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:08,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:08,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:08,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:08,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-05 04:32:08,084 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:08,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:08,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:08,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:08,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:08,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:08,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:08,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:08,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:08,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:08,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:08,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-06-05 04:32:08,095 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:08,107 INFO L628 ElimStorePlain]: treesize reduction 112, result has 8.9 percent of original size [2021-06-05 04:32:08,107 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:32:08,107 INFO L518 ElimStorePlain]: Eliminatee v_prenex_323 vanished before elimination [2021-06-05 04:32:08,107 INFO L518 ElimStorePlain]: Eliminatee v_prenex_324 vanished before elimination [2021-06-05 04:32:08,108 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:32:08,108 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-06-05 04:32:08,116 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:08,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312015402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:08,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:08,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 04:32:08,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667849033] [2021-06-05 04:32:08,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:32:08,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:08,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:32:08,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:32:08,117 INFO L87 Difference]: Start difference. First operand 1443 states and 4213 transitions. Second operand has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:08,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:08,693 INFO L93 Difference]: Finished difference Result 1494 states and 4320 transitions. [2021-06-05 04:32:08,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:32:08,694 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:32:08,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:08,695 INFO L225 Difference]: With dead ends: 1494 [2021-06-05 04:32:08,696 INFO L226 Difference]: Without dead ends: 1485 [2021-06-05 04:32:08,696 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1016.5ms TimeCoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:32:08,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1485 states. [2021-06-05 04:32:08,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1485 to 1451. [2021-06-05 04:32:08,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1451 states, 1450 states have (on average 2.9172413793103447) internal successors, (4230), 1450 states have internal predecessors, (4230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:08,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1451 states to 1451 states and 4230 transitions. [2021-06-05 04:32:08,709 INFO L78 Accepts]: Start accepts. Automaton has 1451 states and 4230 transitions. Word has length 18 [2021-06-05 04:32:08,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:08,709 INFO L482 AbstractCegarLoop]: Abstraction has 1451 states and 4230 transitions. [2021-06-05 04:32:08,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:08,709 INFO L276 IsEmpty]: Start isEmpty. Operand 1451 states and 4230 transitions. [2021-06-05 04:32:08,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:32:08,711 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:08,711 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:08,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3175,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:08,917 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:08,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:08,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1783665322, now seen corresponding path program 381 times [2021-06-05 04:32:08,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:08,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525943116] [2021-06-05 04:32:08,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:08,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:09,410 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:09,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:09,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525943116] [2021-06-05 04:32:09,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525943116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:09,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665975787] [2021-06-05 04:32:09,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:09,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:32:09,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:09,451 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 04:32:09,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:10,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:10,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:10,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:10,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:10,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:10,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:10,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:10,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:10,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:10,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:10,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:10,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 32 [2021-06-05 04:32:10,163 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:10,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:10,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:10,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:10,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:10,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:10,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:10,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:10,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:10,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:10,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:10,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-05 04:32:10,173 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:10,221 INFO L628 ElimStorePlain]: treesize reduction 91, result has 47.4 percent of original size [2021-06-05 04:32:10,221 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:32:10,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:10,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:10,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:10,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:10,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:10,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:10,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:10,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:10,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:10,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:10,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-06-05 04:32:10,230 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:10,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:32:10,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:10,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 04:32:10,244 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:10,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:32:10,255 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:32:10,255 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:257, output treesize:22 [2021-06-05 04:32:10,277 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:10,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665975787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:10,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:10,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 04:32:10,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344202948] [2021-06-05 04:32:10,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:32:10,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:10,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:32:10,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:32:10,278 INFO L87 Difference]: Start difference. First operand 1451 states and 4230 transitions. Second operand has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:11,223 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 72 [2021-06-05 04:32:11,466 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2021-06-05 04:32:11,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:11,596 INFO L93 Difference]: Finished difference Result 1633 states and 4654 transitions. [2021-06-05 04:32:11,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:32:11,597 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:32:11,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:11,598 INFO L225 Difference]: With dead ends: 1633 [2021-06-05 04:32:11,598 INFO L226 Difference]: Without dead ends: 1623 [2021-06-05 04:32:11,598 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 1782.5ms TimeCoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:32:11,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1623 states. [2021-06-05 04:32:11,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1623 to 1478. [2021-06-05 04:32:11,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1478 states, 1477 states have (on average 2.920108327691266) internal successors, (4313), 1477 states have internal predecessors, (4313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:11,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1478 states to 1478 states and 4313 transitions. [2021-06-05 04:32:11,612 INFO L78 Accepts]: Start accepts. Automaton has 1478 states and 4313 transitions. Word has length 18 [2021-06-05 04:32:11,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:11,612 INFO L482 AbstractCegarLoop]: Abstraction has 1478 states and 4313 transitions. [2021-06-05 04:32:11,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:11,612 INFO L276 IsEmpty]: Start isEmpty. Operand 1478 states and 4313 transitions. [2021-06-05 04:32:11,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:32:11,613 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:11,613 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:11,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 386 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3193 [2021-06-05 04:32:11,814 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:11,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:11,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1791395720, now seen corresponding path program 382 times [2021-06-05 04:32:11,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:11,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441140983] [2021-06-05 04:32:11,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:11,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:12,047 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:12,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:12,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441140983] [2021-06-05 04:32:12,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441140983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:12,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471171537] [2021-06-05 04:32:12,047 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:12,074 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:32:12,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:12,075 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 04:32:12,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:12,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:12,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:12,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:12,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:12,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:12,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:12,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:12,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:12,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:12,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:12,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-06-05 04:32:12,698 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:12,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:12,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:12,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:12,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:12,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:12,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:12,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:12,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:12,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:12,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:12,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-06-05 04:32:12,714 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:12,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:12,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:12,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:12,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:12,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:12,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:12,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:12,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:12,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:12,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 40 [2021-06-05 04:32:12,724 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:12,736 INFO L628 ElimStorePlain]: treesize reduction 70, result has 13.6 percent of original size [2021-06-05 04:32:12,736 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:32:12,737 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:32:12,737 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:194, output treesize:11 [2021-06-05 04:32:12,764 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:12,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471171537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:12,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:12,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 04:32:12,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585350025] [2021-06-05 04:32:12,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:32:12,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:12,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:32:12,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:32:12,765 INFO L87 Difference]: Start difference. First operand 1478 states and 4313 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:13,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:13,492 INFO L93 Difference]: Finished difference Result 1690 states and 4811 transitions. [2021-06-05 04:32:13,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:32:13,493 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:32:13,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:13,495 INFO L225 Difference]: With dead ends: 1690 [2021-06-05 04:32:13,495 INFO L226 Difference]: Without dead ends: 1687 [2021-06-05 04:32:13,495 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1031.2ms TimeCoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:32:13,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1687 states. [2021-06-05 04:32:13,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1687 to 1566. [2021-06-05 04:32:13,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1566 states, 1565 states have (on average 2.94888178913738) internal successors, (4615), 1565 states have internal predecessors, (4615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:13,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1566 states to 1566 states and 4615 transitions. [2021-06-05 04:32:13,510 INFO L78 Accepts]: Start accepts. Automaton has 1566 states and 4615 transitions. Word has length 18 [2021-06-05 04:32:13,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:13,511 INFO L482 AbstractCegarLoop]: Abstraction has 1566 states and 4615 transitions. [2021-06-05 04:32:13,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:13,511 INFO L276 IsEmpty]: Start isEmpty. Operand 1566 states and 4615 transitions. [2021-06-05 04:32:13,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:32:13,512 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:13,512 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:13,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 387 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3210 [2021-06-05 04:32:13,713 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:13,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:13,713 INFO L82 PathProgramCache]: Analyzing trace with hash -2089409042, now seen corresponding path program 383 times [2021-06-05 04:32:13,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:13,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883608907] [2021-06-05 04:32:13,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:13,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:14,046 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-06-05 04:32:14,176 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-06-05 04:32:14,230 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:14,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:14,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883608907] [2021-06-05 04:32:14,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883608907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:14,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583795163] [2021-06-05 04:32:14,231 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:14,260 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:32:14,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:14,261 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 04:32:14,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:15,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:15,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:15,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:15,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:15,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:15,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:15,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:15,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-06-05 04:32:15,021 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:15,049 INFO L628 ElimStorePlain]: treesize reduction 147, result has 7.0 percent of original size [2021-06-05 04:32:15,049 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-05 04:32:15,049 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:32:15,049 INFO L518 ElimStorePlain]: Eliminatee v_prenex_330 vanished before elimination [2021-06-05 04:32:15,050 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:32:15,050 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:194, output treesize:11 [2021-06-05 04:32:15,080 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:15,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583795163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:15,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:15,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 04:32:15,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639699505] [2021-06-05 04:32:15,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:32:15,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:15,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:32:15,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:32:15,081 INFO L87 Difference]: Start difference. First operand 1566 states and 4615 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:16,607 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-06-05 04:32:16,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:16,758 INFO L93 Difference]: Finished difference Result 1665 states and 4804 transitions. [2021-06-05 04:32:16,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:32:16,758 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:32:16,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:16,760 INFO L225 Difference]: With dead ends: 1665 [2021-06-05 04:32:16,760 INFO L226 Difference]: Without dead ends: 1662 [2021-06-05 04:32:16,761 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 2315.4ms TimeCoverageRelationStatistics Valid=153, Invalid=1179, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 04:32:16,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1662 states. [2021-06-05 04:32:16,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1662 to 1578. [2021-06-05 04:32:16,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1578 states, 1577 states have (on average 2.946734305643627) internal successors, (4647), 1577 states have internal predecessors, (4647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:16,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 4647 transitions. [2021-06-05 04:32:16,775 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 4647 transitions. Word has length 18 [2021-06-05 04:32:16,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:16,775 INFO L482 AbstractCegarLoop]: Abstraction has 1578 states and 4647 transitions. [2021-06-05 04:32:16,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:16,775 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 4647 transitions. [2021-06-05 04:32:16,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:32:16,777 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:16,777 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:16,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3234,388 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:16,977 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:16,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:16,978 INFO L82 PathProgramCache]: Analyzing trace with hash 723883656, now seen corresponding path program 384 times [2021-06-05 04:32:16,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:16,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274294828] [2021-06-05 04:32:16,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:16,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:17,331 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:17,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:17,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274294828] [2021-06-05 04:32:17,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274294828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:17,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493844160] [2021-06-05 04:32:17,332 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:17,362 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:32:17,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:17,363 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 04:32:17,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:17,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:17,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:17,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:17,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:17,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:17,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:17,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:17,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:17,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:17,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:17,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 30 [2021-06-05 04:32:17,988 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:17,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:17,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:17,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:17,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:17,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:17,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:17,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:17,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:18,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:18,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-06-05 04:32:18,003 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:18,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:18,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:18,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:18,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:18,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:18,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:18,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:18,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:18,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:18,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:18,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-06-05 04:32:18,019 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:18,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:18,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:18,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:18,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:18,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:18,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:18,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:18,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:18,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 46 [2021-06-05 04:32:18,029 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:18,098 INFO L628 ElimStorePlain]: treesize reduction 101, result has 42.0 percent of original size [2021-06-05 04:32:18,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:18,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:32:18,102 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:32:18,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:32:18,131 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:32:18,131 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:329, output treesize:52 [2021-06-05 04:32:18,198 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:18,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493844160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:18,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:18,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-05 04:32:18,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957674006] [2021-06-05 04:32:18,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:32:18,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:18,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:32:18,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:32:18,199 INFO L87 Difference]: Start difference. First operand 1578 states and 4647 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:19,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:19,628 INFO L93 Difference]: Finished difference Result 1745 states and 5001 transitions. [2021-06-05 04:32:19,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:32:19,628 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:32:19,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:19,630 INFO L225 Difference]: With dead ends: 1745 [2021-06-05 04:32:19,630 INFO L226 Difference]: Without dead ends: 1736 [2021-06-05 04:32:19,630 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 1751.6ms TimeCoverageRelationStatistics Valid=125, Invalid=997, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 04:32:19,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1736 states. [2021-06-05 04:32:19,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1736 to 1590. [2021-06-05 04:32:19,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1590 states, 1589 states have (on average 2.951541850220264) internal successors, (4690), 1589 states have internal predecessors, (4690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:19,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1590 states to 1590 states and 4690 transitions. [2021-06-05 04:32:19,646 INFO L78 Accepts]: Start accepts. Automaton has 1590 states and 4690 transitions. Word has length 18 [2021-06-05 04:32:19,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:19,646 INFO L482 AbstractCegarLoop]: Abstraction has 1590 states and 4690 transitions. [2021-06-05 04:32:19,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:19,646 INFO L276 IsEmpty]: Start isEmpty. Operand 1590 states and 4690 transitions. [2021-06-05 04:32:19,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:32:19,647 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:19,647 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:19,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3256,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:19,848 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:19,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:19,848 INFO L82 PathProgramCache]: Analyzing trace with hash -302051606, now seen corresponding path program 385 times [2021-06-05 04:32:19,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:19,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437886207] [2021-06-05 04:32:19,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:19,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:20,133 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:20,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:20,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437886207] [2021-06-05 04:32:20,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437886207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:20,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273602787] [2021-06-05 04:32:20,133 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:20,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:20,163 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 04:32:20,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:20,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:20,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:20,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:20,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:20,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:20,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:20,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:20,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:20,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:20,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:20,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-05 04:32:20,895 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:20,915 INFO L628 ElimStorePlain]: treesize reduction 155, result has 6.6 percent of original size [2021-06-05 04:32:20,916 INFO L518 ElimStorePlain]: Eliminatee v_prenex_339 vanished before elimination [2021-06-05 04:32:20,916 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-05 04:32:20,916 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:32:20,916 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:32:20,916 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-06-05 04:32:20,924 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:20,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273602787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:20,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:20,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 04:32:20,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91744328] [2021-06-05 04:32:20,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:32:20,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:20,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:32:20,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:32:20,925 INFO L87 Difference]: Start difference. First operand 1590 states and 4690 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:22,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:22,032 INFO L93 Difference]: Finished difference Result 1737 states and 4961 transitions. [2021-06-05 04:32:22,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:32:22,033 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:32:22,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:22,035 INFO L225 Difference]: With dead ends: 1737 [2021-06-05 04:32:22,035 INFO L226 Difference]: Without dead ends: 1719 [2021-06-05 04:32:22,035 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 1456.4ms TimeCoverageRelationStatistics Valid=110, Invalid=820, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:32:22,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1719 states. [2021-06-05 04:32:22,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1719 to 1562. [2021-06-05 04:32:22,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1562 states, 1561 states have (on average 2.9506726457399104) internal successors, (4606), 1561 states have internal predecessors, (4606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:22,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1562 states to 1562 states and 4606 transitions. [2021-06-05 04:32:22,050 INFO L78 Accepts]: Start accepts. Automaton has 1562 states and 4606 transitions. Word has length 18 [2021-06-05 04:32:22,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:22,051 INFO L482 AbstractCegarLoop]: Abstraction has 1562 states and 4606 transitions. [2021-06-05 04:32:22,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:22,051 INFO L276 IsEmpty]: Start isEmpty. Operand 1562 states and 4606 transitions. [2021-06-05 04:32:22,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:32:22,052 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:22,052 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:22,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3278 [2021-06-05 04:32:22,253 INFO L430 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:22,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:22,253 INFO L82 PathProgramCache]: Analyzing trace with hash -2114266168, now seen corresponding path program 386 times [2021-06-05 04:32:22,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:22,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009147236] [2021-06-05 04:32:22,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:22,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:22,540 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:22,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:22,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009147236] [2021-06-05 04:32:22,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009147236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:22,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468303638] [2021-06-05 04:32:22,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:22,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:32:22,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:22,571 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 04:32:22,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:23,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:23,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:23,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:23,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:23,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:23,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:23,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:23,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-06-05 04:32:23,290 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:23,309 INFO L628 ElimStorePlain]: treesize reduction 143, result has 7.1 percent of original size [2021-06-05 04:32:23,309 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:32:23,309 INFO L518 ElimStorePlain]: Eliminatee v_prenex_343 vanished before elimination [2021-06-05 04:32:23,309 INFO L518 ElimStorePlain]: Eliminatee v_prenex_344 vanished before elimination [2021-06-05 04:32:23,310 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:32:23,310 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:194, output treesize:11 [2021-06-05 04:32:23,337 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:23,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468303638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:23,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:23,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 04:32:23,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734523237] [2021-06-05 04:32:23,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:32:23,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:23,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:32:23,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:32:23,338 INFO L87 Difference]: Start difference. First operand 1562 states and 4606 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:23,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:23,980 INFO L93 Difference]: Finished difference Result 1728 states and 4945 transitions. [2021-06-05 04:32:23,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:32:23,980 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:32:23,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:23,982 INFO L225 Difference]: With dead ends: 1728 [2021-06-05 04:32:23,982 INFO L226 Difference]: Without dead ends: 1713 [2021-06-05 04:32:23,982 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1205.1ms TimeCoverageRelationStatistics Valid=138, Invalid=854, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:32:23,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1713 states. [2021-06-05 04:32:23,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1713 to 1598. [2021-06-05 04:32:23,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1598 states, 1597 states have (on average 2.949906073888541) internal successors, (4711), 1597 states have internal predecessors, (4711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:23,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1598 states to 1598 states and 4711 transitions. [2021-06-05 04:32:23,998 INFO L78 Accepts]: Start accepts. Automaton has 1598 states and 4711 transitions. Word has length 18 [2021-06-05 04:32:23,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:23,998 INFO L482 AbstractCegarLoop]: Abstraction has 1598 states and 4711 transitions. [2021-06-05 04:32:23,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:23,998 INFO L276 IsEmpty]: Start isEmpty. Operand 1598 states and 4711 transitions. [2021-06-05 04:32:24,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:32:24,000 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:24,000 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:24,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 391 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3295 [2021-06-05 04:32:24,200 INFO L430 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:24,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:24,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1895630038, now seen corresponding path program 387 times [2021-06-05 04:32:24,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:24,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153417036] [2021-06-05 04:32:24,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:24,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:24,381 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:24,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:24,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153417036] [2021-06-05 04:32:24,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153417036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:24,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136509536] [2021-06-05 04:32:24,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:24,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:32:24,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:24,412 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 04:32:24,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:25,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:25,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:25,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:25,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:25,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:25,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:25,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:25,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:25,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 38 [2021-06-05 04:32:25,166 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:25,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:25,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:25,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:25,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:25,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:25,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:25,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:25,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 36 [2021-06-05 04:32:25,175 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:25,189 INFO L628 ElimStorePlain]: treesize reduction 104, result has 9.6 percent of original size [2021-06-05 04:32:25,189 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:32:25,189 INFO L518 ElimStorePlain]: Eliminatee v_prenex_346 vanished before elimination [2021-06-05 04:32:25,189 INFO L518 ElimStorePlain]: Eliminatee v_prenex_347 vanished before elimination [2021-06-05 04:32:25,189 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:32:25,189 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:182, output treesize:11 [2021-06-05 04:32:25,215 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:25,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136509536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:25,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:25,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-06-05 04:32:25,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501751293] [2021-06-05 04:32:25,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:32:25,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:25,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:32:25,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:32:25,215 INFO L87 Difference]: Start difference. First operand 1598 states and 4711 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:26,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:26,180 INFO L93 Difference]: Finished difference Result 1701 states and 4889 transitions. [2021-06-05 04:32:26,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:32:26,181 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:32:26,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:26,183 INFO L225 Difference]: With dead ends: 1701 [2021-06-05 04:32:26,183 INFO L226 Difference]: Without dead ends: 1696 [2021-06-05 04:32:26,183 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 1419.7ms TimeCoverageRelationStatistics Valid=136, Invalid=920, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:32:26,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1696 states. [2021-06-05 04:32:26,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1696 to 1539. [2021-06-05 04:32:26,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1539 states, 1538 states have (on average 2.9408322496749024) internal successors, (4523), 1538 states have internal predecessors, (4523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:26,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1539 states to 1539 states and 4523 transitions. [2021-06-05 04:32:26,198 INFO L78 Accepts]: Start accepts. Automaton has 1539 states and 4523 transitions. Word has length 18 [2021-06-05 04:32:26,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:26,198 INFO L482 AbstractCegarLoop]: Abstraction has 1539 states and 4523 transitions. [2021-06-05 04:32:26,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:26,198 INFO L276 IsEmpty]: Start isEmpty. Operand 1539 states and 4523 transitions. [2021-06-05 04:32:26,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:32:26,199 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:26,199 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:26,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3313,392 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:26,400 INFO L430 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:26,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:26,400 INFO L82 PathProgramCache]: Analyzing trace with hash 917662660, now seen corresponding path program 388 times [2021-06-05 04:32:26,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:26,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504445164] [2021-06-05 04:32:26,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:26,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:26,641 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:32:26,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:26,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504445164] [2021-06-05 04:32:26,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504445164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:26,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040195914] [2021-06-05 04:32:26,642 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:26,671 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:32:26,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:26,671 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 04:32:26,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:27,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:27,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:27,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:27,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:27,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:27,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-06-05 04:32:27,259 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:27,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:27,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:27,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:27,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:27,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:27,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 36 [2021-06-05 04:32:27,270 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:27,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:27,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:27,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:27,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:27,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-06-05 04:32:27,276 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:27,289 INFO L628 ElimStorePlain]: treesize reduction 62, result has 15.1 percent of original size [2021-06-05 04:32:27,289 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:32:27,289 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:32:27,289 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:170, output treesize:11 [2021-06-05 04:32:27,317 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:27,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040195914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:27,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:27,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-06-05 04:32:27,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298290253] [2021-06-05 04:32:27,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:32:27,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:27,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:32:27,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:32:27,318 INFO L87 Difference]: Start difference. First operand 1539 states and 4523 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:28,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:28,590 INFO L93 Difference]: Finished difference Result 1648 states and 4754 transitions. [2021-06-05 04:32:28,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:32:28,590 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:32:28,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:28,593 INFO L225 Difference]: With dead ends: 1648 [2021-06-05 04:32:28,593 INFO L226 Difference]: Without dead ends: 1640 [2021-06-05 04:32:28,593 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 1608.0ms TimeCoverageRelationStatistics Valid=153, Invalid=1037, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:32:28,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1640 states. [2021-06-05 04:32:28,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1640 to 1538. [2021-06-05 04:32:28,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1538 states, 1537 states have (on average 2.9362394274560835) internal successors, (4513), 1537 states have internal predecessors, (4513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:28,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 4513 transitions. [2021-06-05 04:32:28,613 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 4513 transitions. Word has length 18 [2021-06-05 04:32:28,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:28,614 INFO L482 AbstractCegarLoop]: Abstraction has 1538 states and 4513 transitions. [2021-06-05 04:32:28,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:28,614 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 4513 transitions. [2021-06-05 04:32:28,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:32:28,615 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:28,615 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:28,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3334,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:28,821 INFO L430 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:28,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:28,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1990748040, now seen corresponding path program 389 times [2021-06-05 04:32:28,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:28,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020615207] [2021-06-05 04:32:28,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:28,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:29,105 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:29,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:29,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020615207] [2021-06-05 04:32:29,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020615207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:29,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992969628] [2021-06-05 04:32:29,105 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:29,134 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:32:29,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:29,135 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 04:32:29,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:29,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:29,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:29,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:29,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:29,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:29,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-06-05 04:32:29,721 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:29,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:29,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:29,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:29,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:29,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:29,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 36 [2021-06-05 04:32:29,731 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:29,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:29,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:29,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:29,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:29,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-06-05 04:32:29,738 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:29,750 INFO L628 ElimStorePlain]: treesize reduction 72, result has 13.3 percent of original size [2021-06-05 04:32:29,750 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:32:29,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:32:29,751 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:170, output treesize:11 [2021-06-05 04:32:29,781 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:29,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992969628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:29,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:29,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-05 04:32:29,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962835475] [2021-06-05 04:32:29,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:32:29,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:29,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:32:29,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:32:29,781 INFO L87 Difference]: Start difference. First operand 1538 states and 4513 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:31,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:31,556 INFO L93 Difference]: Finished difference Result 1695 states and 4818 transitions. [2021-06-05 04:32:31,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 04:32:31,556 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:32:31,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:31,558 INFO L225 Difference]: With dead ends: 1695 [2021-06-05 04:32:31,558 INFO L226 Difference]: Without dead ends: 1685 [2021-06-05 04:32:31,558 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 2050.1ms TimeCoverageRelationStatistics Valid=190, Invalid=1532, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 04:32:31,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1685 states. [2021-06-05 04:32:31,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1685 to 1536. [2021-06-05 04:32:31,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1536 states, 1535 states have (on average 2.9381107491856677) internal successors, (4510), 1535 states have internal predecessors, (4510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:31,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1536 states to 1536 states and 4510 transitions. [2021-06-05 04:32:31,573 INFO L78 Accepts]: Start accepts. Automaton has 1536 states and 4510 transitions. Word has length 18 [2021-06-05 04:32:31,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:31,573 INFO L482 AbstractCegarLoop]: Abstraction has 1536 states and 4510 transitions. [2021-06-05 04:32:31,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:31,573 INFO L276 IsEmpty]: Start isEmpty. Operand 1536 states and 4510 transitions. [2021-06-05 04:32:31,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:32:31,575 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:31,575 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:31,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3367,394 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:31,775 INFO L430 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:31,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:31,776 INFO L82 PathProgramCache]: Analyzing trace with hash 579517824, now seen corresponding path program 390 times [2021-06-05 04:32:31,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:31,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956047025] [2021-06-05 04:32:31,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:31,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:31,963 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:31,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:31,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956047025] [2021-06-05 04:32:31,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956047025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:31,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160139826] [2021-06-05 04:32:31,963 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:31,992 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:32:31,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:31,993 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 04:32:31,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:32,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:32,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:32,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:32,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:32,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:32,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:32,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:32,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:32,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-05 04:32:32,648 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:32,668 INFO L628 ElimStorePlain]: treesize reduction 155, result has 6.6 percent of original size [2021-06-05 04:32:32,668 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:32:32,668 INFO L518 ElimStorePlain]: Eliminatee v_prenex_353 vanished before elimination [2021-06-05 04:32:32,668 INFO L518 ElimStorePlain]: Eliminatee v_prenex_354 vanished before elimination [2021-06-05 04:32:32,669 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:32:32,669 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-06-05 04:32:32,677 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:32,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160139826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:32,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:32,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 04:32:32,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552675096] [2021-06-05 04:32:32,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:32:32,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:32,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:32:32,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:32:32,678 INFO L87 Difference]: Start difference. First operand 1536 states and 4510 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:33,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:33,205 INFO L93 Difference]: Finished difference Result 1589 states and 4619 transitions. [2021-06-05 04:32:33,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:32:33,206 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:32:33,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:33,208 INFO L225 Difference]: With dead ends: 1589 [2021-06-05 04:32:33,208 INFO L226 Difference]: Without dead ends: 1582 [2021-06-05 04:32:33,208 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 861.7ms TimeCoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:32:33,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1582 states. [2021-06-05 04:32:33,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1582 to 1540. [2021-06-05 04:32:33,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1540 states, 1539 states have (on average 2.935672514619883) internal successors, (4518), 1539 states have internal predecessors, (4518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:33,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1540 states to 1540 states and 4518 transitions. [2021-06-05 04:32:33,223 INFO L78 Accepts]: Start accepts. Automaton has 1540 states and 4518 transitions. Word has length 18 [2021-06-05 04:32:33,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:33,223 INFO L482 AbstractCegarLoop]: Abstraction has 1540 states and 4518 transitions. [2021-06-05 04:32:33,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:33,223 INFO L276 IsEmpty]: Start isEmpty. Operand 1540 states and 4518 transitions. [2021-06-05 04:32:33,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:32:33,224 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:33,224 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:33,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3400,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:33,425 INFO L430 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:33,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:33,425 INFO L82 PathProgramCache]: Analyzing trace with hash 2081515840, now seen corresponding path program 391 times [2021-06-05 04:32:33,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:33,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940774465] [2021-06-05 04:32:33,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:33,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:33,639 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:33,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:33,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940774465] [2021-06-05 04:32:33,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940774465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:33,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021010623] [2021-06-05 04:32:33,639 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:33,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:33,669 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 04:32:33,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:34,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:34,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:34,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:34,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:34,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:34,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:34,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:34,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:34,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-05 04:32:34,284 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:34,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:34,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:34,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:34,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:34,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:34,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:34,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:34,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-06-05 04:32:34,307 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:34,325 INFO L628 ElimStorePlain]: treesize reduction 110, result has 9.1 percent of original size [2021-06-05 04:32:34,325 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:32:34,325 INFO L518 ElimStorePlain]: Eliminatee v_prenex_357 vanished before elimination [2021-06-05 04:32:34,325 INFO L518 ElimStorePlain]: Eliminatee v_prenex_358 vanished before elimination [2021-06-05 04:32:34,326 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:32:34,326 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-06-05 04:32:34,337 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:34,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021010623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:34,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:34,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 04:32:34,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629589753] [2021-06-05 04:32:34,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:32:34,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:34,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:32:34,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:32:34,338 INFO L87 Difference]: Start difference. First operand 1540 states and 4518 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:34,774 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-06-05 04:32:34,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:34,997 INFO L93 Difference]: Finished difference Result 1632 states and 4677 transitions. [2021-06-05 04:32:34,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:32:34,998 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:32:34,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:35,000 INFO L225 Difference]: With dead ends: 1632 [2021-06-05 04:32:35,000 INFO L226 Difference]: Without dead ends: 1623 [2021-06-05 04:32:35,000 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1080.3ms TimeCoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:32:35,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1623 states. [2021-06-05 04:32:35,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1623 to 1544. [2021-06-05 04:32:35,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1544 states, 1543 states have (on average 2.929358392741413) internal successors, (4520), 1543 states have internal predecessors, (4520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:35,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 4520 transitions. [2021-06-05 04:32:35,023 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 4520 transitions. Word has length 18 [2021-06-05 04:32:35,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:35,023 INFO L482 AbstractCegarLoop]: Abstraction has 1544 states and 4520 transitions. [2021-06-05 04:32:35,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:35,023 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 4520 transitions. [2021-06-05 04:32:35,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:32:35,024 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:35,024 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:35,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 396 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3419 [2021-06-05 04:32:35,225 INFO L430 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:35,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:35,225 INFO L82 PathProgramCache]: Analyzing trace with hash 659752486, now seen corresponding path program 392 times [2021-06-05 04:32:35,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:35,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119867886] [2021-06-05 04:32:35,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:35,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:35,517 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:35,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:35,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119867886] [2021-06-05 04:32:35,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119867886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:35,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070168375] [2021-06-05 04:32:35,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:35,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:32:35,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:35,547 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 04:32:35,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:36,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:36,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:36,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:36,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:36,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:36,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:36,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:36,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:36,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:36,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:36,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:36,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-05 04:32:36,250 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:36,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:36,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:36,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:36,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:36,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:36,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:36,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:36,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:36,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:36,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:36,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-06-05 04:32:36,270 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:36,285 INFO L628 ElimStorePlain]: treesize reduction 106, result has 9.4 percent of original size [2021-06-05 04:32:36,285 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:32:36,285 INFO L518 ElimStorePlain]: Eliminatee v_prenex_363 vanished before elimination [2021-06-05 04:32:36,285 INFO L518 ElimStorePlain]: Eliminatee v_prenex_364 vanished before elimination [2021-06-05 04:32:36,285 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:32:36,285 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-06-05 04:32:36,312 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:36,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070168375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:36,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:36,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 04:32:36,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052350217] [2021-06-05 04:32:36,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:32:36,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:36,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:32:36,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:32:36,313 INFO L87 Difference]: Start difference. First operand 1544 states and 4520 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:37,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:37,030 INFO L93 Difference]: Finished difference Result 1739 states and 4962 transitions. [2021-06-05 04:32:37,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:32:37,030 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:32:37,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:37,032 INFO L225 Difference]: With dead ends: 1739 [2021-06-05 04:32:37,032 INFO L226 Difference]: Without dead ends: 1730 [2021-06-05 04:32:37,032 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1066.1ms TimeCoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:32:37,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1730 states. [2021-06-05 04:32:37,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1730 to 1597. [2021-06-05 04:32:37,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1597 states, 1596 states have (on average 2.93796992481203) internal successors, (4689), 1596 states have internal predecessors, (4689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:37,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1597 states to 1597 states and 4689 transitions. [2021-06-05 04:32:37,048 INFO L78 Accepts]: Start accepts. Automaton has 1597 states and 4689 transitions. Word has length 18 [2021-06-05 04:32:37,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:37,048 INFO L482 AbstractCegarLoop]: Abstraction has 1597 states and 4689 transitions. [2021-06-05 04:32:37,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:37,048 INFO L276 IsEmpty]: Start isEmpty. Operand 1597 states and 4689 transitions. [2021-06-05 04:32:37,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:32:37,050 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:37,050 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:37,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3439 [2021-06-05 04:32:37,250 INFO L430 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:37,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:37,250 INFO L82 PathProgramCache]: Analyzing trace with hash -307490624, now seen corresponding path program 393 times [2021-06-05 04:32:37,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:37,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987560396] [2021-06-05 04:32:37,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:37,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:37,511 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:37,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:37,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987560396] [2021-06-05 04:32:37,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987560396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:37,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973772776] [2021-06-05 04:32:37,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:37,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:32:37,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:37,542 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-05 04:32:37,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:38,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:38,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:38,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:38,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:38,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:38,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:38,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:38,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:38,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-05 04:32:38,232 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:38,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:38,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:38,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:38,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:38,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:38,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:38,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:38,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:38,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 48 [2021-06-05 04:32:38,245 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:38,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:38,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:38,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:38,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:38,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:38,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:38,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:38,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:38,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:38,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:38,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:38,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 32 [2021-06-05 04:32:38,264 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:38,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:38,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:38,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:38,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:38,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:38,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:38,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:38,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:38,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:38,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:38,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-05 04:32:38,275 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:38,347 INFO L628 ElimStorePlain]: treesize reduction 105, result has 41.0 percent of original size [2021-06-05 04:32:38,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:38,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-05 04:32:38,351 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 04:32:38,377 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:32:38,379 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:32:38,379 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:345, output treesize:56 [2021-06-05 04:32:38,444 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:38,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973772776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:38,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:38,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 04:32:38,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287672376] [2021-06-05 04:32:38,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:32:38,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:38,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:32:38,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:32:38,445 INFO L87 Difference]: Start difference. First operand 1597 states and 4689 transitions. Second operand has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:38,759 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2021-06-05 04:32:39,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:39,087 INFO L93 Difference]: Finished difference Result 1778 states and 5087 transitions. [2021-06-05 04:32:39,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:32:39,087 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:32:39,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:39,089 INFO L225 Difference]: With dead ends: 1778 [2021-06-05 04:32:39,089 INFO L226 Difference]: Without dead ends: 1769 [2021-06-05 04:32:39,090 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1140.4ms TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:32:39,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1769 states. [2021-06-05 04:32:39,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1769 to 1652. [2021-06-05 04:32:39,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1652 states, 1651 states have (on average 2.9448818897637796) internal successors, (4862), 1651 states have internal predecessors, (4862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:39,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1652 states to 1652 states and 4862 transitions. [2021-06-05 04:32:39,106 INFO L78 Accepts]: Start accepts. Automaton has 1652 states and 4862 transitions. Word has length 18 [2021-06-05 04:32:39,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:39,106 INFO L482 AbstractCegarLoop]: Abstraction has 1652 states and 4862 transitions. [2021-06-05 04:32:39,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:39,106 INFO L276 IsEmpty]: Start isEmpty. Operand 1652 states and 4862 transitions. [2021-06-05 04:32:39,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:32:39,107 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:39,107 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:39,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3459,398 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:39,308 INFO L430 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:39,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:39,308 INFO L82 PathProgramCache]: Analyzing trace with hash 354044646, now seen corresponding path program 394 times [2021-06-05 04:32:39,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:39,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551128726] [2021-06-05 04:32:39,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:39,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:39,909 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:39,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:39,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551128726] [2021-06-05 04:32:39,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551128726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:39,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083946502] [2021-06-05 04:32:39,910 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:39,938 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:32:39,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:39,939 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 04:32:39,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:40,466 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-06-05 04:32:40,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:40,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:40,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:40,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:40,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:40,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:40,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:40,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:40,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 38 [2021-06-05 04:32:40,732 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:40,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:40,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:40,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:40,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:40,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:40,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:40,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:40,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 36 [2021-06-05 04:32:40,742 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:40,787 INFO L628 ElimStorePlain]: treesize reduction 87, result has 46.3 percent of original size [2021-06-05 04:32:40,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:40,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 04:32:40,790 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:40,806 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:32:40,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:40,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:40,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:40,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:40,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:40,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 23 [2021-06-05 04:32:40,813 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:40,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:32:40,823 INFO L518 ElimStorePlain]: Eliminatee v_prenex_369 vanished before elimination [2021-06-05 04:32:40,824 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:32:40,824 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:225, output treesize:22 [2021-06-05 04:32:40,864 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:40,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083946502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:40,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:40,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 04:32:40,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826773273] [2021-06-05 04:32:40,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:32:40,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:40,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:32:40,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:32:40,864 INFO L87 Difference]: Start difference. First operand 1652 states and 4862 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:41,856 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2021-06-05 04:32:42,106 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 74 [2021-06-05 04:32:42,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:42,415 INFO L93 Difference]: Finished difference Result 1766 states and 5087 transitions. [2021-06-05 04:32:42,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:32:42,415 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:32:42,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:42,417 INFO L225 Difference]: With dead ends: 1766 [2021-06-05 04:32:42,417 INFO L226 Difference]: Without dead ends: 1760 [2021-06-05 04:32:42,417 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 2282.0ms TimeCoverageRelationStatistics Valid=125, Invalid=997, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 04:32:42,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1760 states. [2021-06-05 04:32:42,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1760 to 1664. [2021-06-05 04:32:42,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1664 states, 1663 states have (on average 2.9464822609741432) internal successors, (4900), 1663 states have internal predecessors, (4900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:42,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1664 states to 1664 states and 4900 transitions. [2021-06-05 04:32:42,434 INFO L78 Accepts]: Start accepts. Automaton has 1664 states and 4900 transitions. Word has length 18 [2021-06-05 04:32:42,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:42,434 INFO L482 AbstractCegarLoop]: Abstraction has 1664 states and 4900 transitions. [2021-06-05 04:32:42,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:42,434 INFO L276 IsEmpty]: Start isEmpty. Operand 1664 states and 4900 transitions. [2021-06-05 04:32:42,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:32:42,435 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:42,435 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:42,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3472 [2021-06-05 04:32:42,636 INFO L430 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:42,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:42,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1127629952, now seen corresponding path program 395 times [2021-06-05 04:32:42,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:42,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433739287] [2021-06-05 04:32:42,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:42,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:43,266 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:43,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:43,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433739287] [2021-06-05 04:32:43,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433739287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:43,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541376177] [2021-06-05 04:32:43,266 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:43,296 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:32:43,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:43,297 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 04:32:43,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:43,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:43,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:43,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:43,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:43,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:43,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 04:32:43,883 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:43,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:43,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:43,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:43,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:43,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:43,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-06-05 04:32:43,895 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:43,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:43,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:43,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:43,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:43,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:43,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 42 [2021-06-05 04:32:43,906 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:43,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:43,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:43,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:43,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:43,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-06-05 04:32:43,912 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:43,929 INFO L628 ElimStorePlain]: treesize reduction 83, result has 15.3 percent of original size [2021-06-05 04:32:43,929 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:32:43,930 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:32:43,930 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:217, output treesize:11 [2021-06-05 04:32:43,965 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:43,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541376177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:43,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:43,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 04:32:43,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447512268] [2021-06-05 04:32:43,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:32:43,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:43,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:32:43,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:32:43,965 INFO L87 Difference]: Start difference. First operand 1664 states and 4900 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:45,239 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 71 [2021-06-05 04:32:45,399 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 70 [2021-06-05 04:32:45,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:45,702 INFO L93 Difference]: Finished difference Result 1734 states and 5045 transitions. [2021-06-05 04:32:45,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:32:45,703 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:32:45,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:45,705 INFO L225 Difference]: With dead ends: 1734 [2021-06-05 04:32:45,705 INFO L226 Difference]: Without dead ends: 1726 [2021-06-05 04:32:45,705 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 2391.4ms TimeCoverageRelationStatistics Valid=145, Invalid=1261, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 04:32:45,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1726 states. [2021-06-05 04:32:45,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1726 to 1667. [2021-06-05 04:32:45,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1667 states, 1666 states have (on average 2.946578631452581) internal successors, (4909), 1666 states have internal predecessors, (4909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:45,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1667 states to 1667 states and 4909 transitions. [2021-06-05 04:32:45,721 INFO L78 Accepts]: Start accepts. Automaton has 1667 states and 4909 transitions. Word has length 18 [2021-06-05 04:32:45,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:45,721 INFO L482 AbstractCegarLoop]: Abstraction has 1667 states and 4909 transitions. [2021-06-05 04:32:45,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:45,721 INFO L276 IsEmpty]: Start isEmpty. Operand 1667 states and 4909 transitions. [2021-06-05 04:32:45,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:32:45,723 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:45,723 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:45,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 400 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3493 [2021-06-05 04:32:45,923 INFO L430 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:45,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:45,923 INFO L82 PathProgramCache]: Analyzing trace with hash -54544572, now seen corresponding path program 396 times [2021-06-05 04:32:45,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:45,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488514330] [2021-06-05 04:32:45,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:45,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:46,573 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:46,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:46,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488514330] [2021-06-05 04:32:46,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488514330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:46,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215067283] [2021-06-05 04:32:46,574 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:46,606 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:32:46,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:46,607 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 04:32:46,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:47,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:47,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:47,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:47,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:47,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:47,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 04:32:47,177 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:47,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:47,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:47,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:47,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:47,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:47,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-06-05 04:32:47,188 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:47,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:47,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:47,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:47,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:47,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:47,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 42 [2021-06-05 04:32:47,200 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:47,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:47,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:47,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:47,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:47,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-06-05 04:32:47,206 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:47,223 INFO L628 ElimStorePlain]: treesize reduction 83, result has 15.3 percent of original size [2021-06-05 04:32:47,223 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:32:47,224 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:32:47,224 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:217, output treesize:11 [2021-06-05 04:32:47,260 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:47,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215067283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:47,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:47,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 04:32:47,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937695198] [2021-06-05 04:32:47,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:32:47,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:47,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:32:47,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:32:47,261 INFO L87 Difference]: Start difference. First operand 1667 states and 4909 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:48,415 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2021-06-05 04:32:48,709 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2021-06-05 04:32:48,924 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 71 [2021-06-05 04:32:49,273 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2021-06-05 04:32:49,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:49,288 INFO L93 Difference]: Finished difference Result 1730 states and 5034 transitions. [2021-06-05 04:32:49,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:32:49,289 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:32:49,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:49,291 INFO L225 Difference]: With dead ends: 1730 [2021-06-05 04:32:49,291 INFO L226 Difference]: Without dead ends: 1722 [2021-06-05 04:32:49,291 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 2612.6ms TimeCoverageRelationStatistics Valid=144, Invalid=1262, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 04:32:49,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1722 states. [2021-06-05 04:32:49,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1722 to 1665. [2021-06-05 04:32:49,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1665 states, 1664 states have (on average 2.9459134615384617) internal successors, (4902), 1664 states have internal predecessors, (4902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:49,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1665 states to 1665 states and 4902 transitions. [2021-06-05 04:32:49,307 INFO L78 Accepts]: Start accepts. Automaton has 1665 states and 4902 transitions. Word has length 18 [2021-06-05 04:32:49,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:49,307 INFO L482 AbstractCegarLoop]: Abstraction has 1665 states and 4902 transitions. [2021-06-05 04:32:49,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:49,307 INFO L276 IsEmpty]: Start isEmpty. Operand 1665 states and 4902 transitions. [2021-06-05 04:32:49,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:32:49,309 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:49,309 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:49,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3522,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:49,509 INFO L430 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:49,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:49,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1148636160, now seen corresponding path program 397 times [2021-06-05 04:32:49,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:49,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145589293] [2021-06-05 04:32:49,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:49,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:49,704 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:49,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:49,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145589293] [2021-06-05 04:32:49,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145589293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:49,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154228961] [2021-06-05 04:32:49,704 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:49,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:49,733 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 04:32:49,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:50,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:50,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:50,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:50,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:50,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:50,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-06-05 04:32:50,234 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:50,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:50,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:50,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:50,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:50,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:50,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 36 [2021-06-05 04:32:50,245 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:50,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:50,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:50,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:50,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 04:32:50,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-06-05 04:32:50,251 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:50,263 INFO L628 ElimStorePlain]: treesize reduction 72, result has 13.3 percent of original size [2021-06-05 04:32:50,263 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:32:50,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:32:50,264 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:170, output treesize:11 [2021-06-05 04:32:50,273 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:50,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154228961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:50,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:50,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 04:32:50,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500871999] [2021-06-05 04:32:50,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:32:50,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:50,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:32:50,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:32:50,274 INFO L87 Difference]: Start difference. First operand 1665 states and 4902 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:51,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:51,125 INFO L93 Difference]: Finished difference Result 1814 states and 5191 transitions. [2021-06-05 04:32:51,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:32:51,125 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:32:51,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:51,127 INFO L225 Difference]: With dead ends: 1814 [2021-06-05 04:32:51,127 INFO L226 Difference]: Without dead ends: 1811 [2021-06-05 04:32:51,128 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1010.2ms TimeCoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:32:51,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1811 states. [2021-06-05 04:32:51,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1811 to 1630. [2021-06-05 04:32:51,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1630 states, 1629 states have (on average 2.9441375076734193) internal successors, (4796), 1629 states have internal predecessors, (4796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:51,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1630 states to 1630 states and 4796 transitions. [2021-06-05 04:32:51,143 INFO L78 Accepts]: Start accepts. Automaton has 1630 states and 4796 transitions. Word has length 18 [2021-06-05 04:32:51,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:51,143 INFO L482 AbstractCegarLoop]: Abstraction has 1630 states and 4796 transitions. [2021-06-05 04:32:51,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:51,143 INFO L276 IsEmpty]: Start isEmpty. Operand 1630 states and 4796 transitions. [2021-06-05 04:32:51,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:32:51,145 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:51,145 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:51,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3553,402 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:51,345 INFO L430 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:51,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:51,345 INFO L82 PathProgramCache]: Analyzing trace with hash -670707060, now seen corresponding path program 398 times [2021-06-05 04:32:51,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:51,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305364817] [2021-06-05 04:32:51,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:51,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:51,461 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:51,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:51,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305364817] [2021-06-05 04:32:51,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305364817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:51,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692655162] [2021-06-05 04:32:51,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:51,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:32:51,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:51,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:32:51,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:51,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:32:51,626 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:51,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:32:51,629 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:51,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:32:51,632 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:51,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:32:51,635 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:51,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:51,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:32:51,638 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:51,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:32:51,641 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:51,666 INFO L628 ElimStorePlain]: treesize reduction 34, result has 37.0 percent of original size [2021-06-05 04:32:51,666 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:32:51,667 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:32:51,667 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:107, output treesize:20 [2021-06-05 04:32:51,696 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:51,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692655162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:51,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:51,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 04:32:51,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768823684] [2021-06-05 04:32:51,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:32:51,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:51,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:32:51,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:32:51,697 INFO L87 Difference]: Start difference. First operand 1630 states and 4796 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:52,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:52,114 INFO L93 Difference]: Finished difference Result 2344 states and 6637 transitions. [2021-06-05 04:32:52,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:32:52,114 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:32:52,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:52,116 INFO L225 Difference]: With dead ends: 2344 [2021-06-05 04:32:52,117 INFO L226 Difference]: Without dead ends: 2331 [2021-06-05 04:32:52,117 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 460.7ms TimeCoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:32:52,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2331 states. [2021-06-05 04:32:52,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2331 to 1627. [2021-06-05 04:32:52,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1627 states, 1626 states have (on average 2.945879458794588) internal successors, (4790), 1626 states have internal predecessors, (4790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:52,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1627 states to 1627 states and 4790 transitions. [2021-06-05 04:32:52,135 INFO L78 Accepts]: Start accepts. Automaton has 1627 states and 4790 transitions. Word has length 19 [2021-06-05 04:32:52,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:52,135 INFO L482 AbstractCegarLoop]: Abstraction has 1627 states and 4790 transitions. [2021-06-05 04:32:52,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:52,135 INFO L276 IsEmpty]: Start isEmpty. Operand 1627 states and 4790 transitions. [2021-06-05 04:32:52,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:32:52,136 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:52,136 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:52,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3585,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:52,337 INFO L430 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:52,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:52,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1117071366, now seen corresponding path program 399 times [2021-06-05 04:32:52,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:52,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405342222] [2021-06-05 04:32:52,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:52,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:52,447 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:52,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:52,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405342222] [2021-06-05 04:32:52,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405342222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:52,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905757697] [2021-06-05 04:32:52,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:52,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:32:52,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:52,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:32:52,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:52,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:52,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:32:52,635 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:52,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:32:52,637 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:52,652 INFO L628 ElimStorePlain]: treesize reduction 27, result has 30.8 percent of original size [2021-06-05 04:32:52,652 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:32:52,653 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:32:52,653 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:12 [2021-06-05 04:32:52,674 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:52,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905757697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:52,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:52,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 04:32:52,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94631194] [2021-06-05 04:32:52,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:32:52,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:52,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:32:52,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:32:52,675 INFO L87 Difference]: Start difference. First operand 1627 states and 4790 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:52,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:52,913 INFO L93 Difference]: Finished difference Result 2346 states and 6648 transitions. [2021-06-05 04:32:52,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:32:52,913 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:32:52,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:52,915 INFO L225 Difference]: With dead ends: 2346 [2021-06-05 04:32:52,915 INFO L226 Difference]: Without dead ends: 2346 [2021-06-05 04:32:52,915 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 248.3ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:32:52,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2346 states. [2021-06-05 04:32:52,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2346 to 1628. [2021-06-05 04:32:52,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1628 states, 1627 states have (on average 2.945912722802704) internal successors, (4793), 1627 states have internal predecessors, (4793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:52,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1628 states to 1628 states and 4793 transitions. [2021-06-05 04:32:52,933 INFO L78 Accepts]: Start accepts. Automaton has 1628 states and 4793 transitions. Word has length 19 [2021-06-05 04:32:52,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:52,933 INFO L482 AbstractCegarLoop]: Abstraction has 1628 states and 4793 transitions. [2021-06-05 04:32:52,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:52,933 INFO L276 IsEmpty]: Start isEmpty. Operand 1628 states and 4793 transitions. [2021-06-05 04:32:52,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:32:52,935 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:52,935 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:53,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3591,404 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:53,135 INFO L430 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:53,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:53,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1608725978, now seen corresponding path program 400 times [2021-06-05 04:32:53,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:53,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569974018] [2021-06-05 04:32:53,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:53,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:53,263 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:53,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:53,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569974018] [2021-06-05 04:32:53,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569974018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:53,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341640068] [2021-06-05 04:32:53,263 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:53,291 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:32:53,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:53,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:32:53,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:53,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:53,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:53,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:32:53,440 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:53,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:53,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:53,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:32:53,443 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:53,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:53,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:53,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:32:53,447 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:53,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:53,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:32:53,449 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:53,484 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:32:53,484 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:32:53,485 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:32:53,485 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:32:53,543 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:53,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341640068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:53,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:53,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 04:32:53,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684543070] [2021-06-05 04:32:53,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:32:53,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:53,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:32:53,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:32:53,544 INFO L87 Difference]: Start difference. First operand 1628 states and 4793 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:53,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:53,963 INFO L93 Difference]: Finished difference Result 2429 states and 6790 transitions. [2021-06-05 04:32:53,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:32:53,963 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:32:53,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:53,966 INFO L225 Difference]: With dead ends: 2429 [2021-06-05 04:32:53,966 INFO L226 Difference]: Without dead ends: 2429 [2021-06-05 04:32:53,966 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 385.1ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:32:53,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2429 states. [2021-06-05 04:32:54,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2429 to 1643. [2021-06-05 04:32:54,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1643 states, 1642 states have (on average 2.949451887941535) internal successors, (4843), 1642 states have internal predecessors, (4843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:54,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1643 states to 1643 states and 4843 transitions. [2021-06-05 04:32:54,003 INFO L78 Accepts]: Start accepts. Automaton has 1643 states and 4843 transitions. Word has length 19 [2021-06-05 04:32:54,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:54,003 INFO L482 AbstractCegarLoop]: Abstraction has 1643 states and 4843 transitions. [2021-06-05 04:32:54,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:54,003 INFO L276 IsEmpty]: Start isEmpty. Operand 1643 states and 4843 transitions. [2021-06-05 04:32:54,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:32:54,005 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:54,005 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:54,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 405 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3593 [2021-06-05 04:32:54,205 INFO L430 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:54,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:54,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1884625090, now seen corresponding path program 401 times [2021-06-05 04:32:54,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:54,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458819212] [2021-06-05 04:32:54,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:54,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:54,333 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:54,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:54,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458819212] [2021-06-05 04:32:54,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458819212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:54,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728319279] [2021-06-05 04:32:54,334 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:54,364 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:32:54,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:54,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:32:54,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:54,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:54,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:54,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:32:54,513 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:54,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:54,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:54,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:32:54,517 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:54,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:54,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:54,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:32:54,520 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:54,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:54,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:32:54,523 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:54,557 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:32:54,557 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:32:54,558 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:32:54,558 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:32:54,635 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:54,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728319279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:54,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:54,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 04:32:54,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729492883] [2021-06-05 04:32:54,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:32:54,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:54,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:32:54,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:32:54,636 INFO L87 Difference]: Start difference. First operand 1643 states and 4843 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:55,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:55,965 INFO L93 Difference]: Finished difference Result 2455 states and 6834 transitions. [2021-06-05 04:32:55,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 04:32:55,965 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:32:55,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:55,968 INFO L225 Difference]: With dead ends: 2455 [2021-06-05 04:32:55,968 INFO L226 Difference]: Without dead ends: 2444 [2021-06-05 04:32:55,968 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 1109.0ms TimeCoverageRelationStatistics Valid=233, Invalid=1929, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 04:32:55,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2444 states. [2021-06-05 04:32:55,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2444 to 1649. [2021-06-05 04:32:55,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1649 states, 1648 states have (on average 2.949635922330097) internal successors, (4861), 1648 states have internal predecessors, (4861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:55,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 4861 transitions. [2021-06-05 04:32:55,987 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 4861 transitions. Word has length 19 [2021-06-05 04:32:55,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:55,987 INFO L482 AbstractCegarLoop]: Abstraction has 1649 states and 4861 transitions. [2021-06-05 04:32:55,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:55,988 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 4861 transitions. [2021-06-05 04:32:55,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:32:55,989 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:55,989 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:56,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3597,406 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:56,190 INFO L430 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:56,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:56,190 INFO L82 PathProgramCache]: Analyzing trace with hash -166281384, now seen corresponding path program 402 times [2021-06-05 04:32:56,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:56,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647143889] [2021-06-05 04:32:56,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:56,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:56,333 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:56,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:56,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647143889] [2021-06-05 04:32:56,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647143889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:56,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072883377] [2021-06-05 04:32:56,333 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:56,364 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:32:56,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:56,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:32:56,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:56,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:56,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:56,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:32:56,514 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:56,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:56,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:56,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:32:56,518 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:56,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:56,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:56,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:32:56,522 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:56,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:56,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:32:56,525 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:56,560 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:32:56,560 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:32:56,561 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:32:56,561 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:32:56,618 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:56,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072883377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:56,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:56,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 04:32:56,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099181123] [2021-06-05 04:32:56,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:32:56,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:56,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:32:56,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:32:56,618 INFO L87 Difference]: Start difference. First operand 1649 states and 4861 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:57,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:57,450 INFO L93 Difference]: Finished difference Result 2425 states and 6791 transitions. [2021-06-05 04:32:57,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 04:32:57,450 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:32:57,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:57,453 INFO L225 Difference]: With dead ends: 2425 [2021-06-05 04:32:57,453 INFO L226 Difference]: Without dead ends: 2425 [2021-06-05 04:32:57,453 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 719.2ms TimeCoverageRelationStatistics Valid=151, Invalid=1109, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 04:32:57,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2425 states. [2021-06-05 04:32:57,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2425 to 1644. [2021-06-05 04:32:57,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1644 states, 1643 states have (on average 2.945830797321972) internal successors, (4840), 1643 states have internal predecessors, (4840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:57,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1644 states to 1644 states and 4840 transitions. [2021-06-05 04:32:57,473 INFO L78 Accepts]: Start accepts. Automaton has 1644 states and 4840 transitions. Word has length 19 [2021-06-05 04:32:57,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:57,473 INFO L482 AbstractCegarLoop]: Abstraction has 1644 states and 4840 transitions. [2021-06-05 04:32:57,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:57,473 INFO L276 IsEmpty]: Start isEmpty. Operand 1644 states and 4840 transitions. [2021-06-05 04:32:57,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:32:57,474 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:57,475 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:57,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3602 [2021-06-05 04:32:57,675 INFO L430 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:57,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:57,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1876894692, now seen corresponding path program 403 times [2021-06-05 04:32:57,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:57,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107490507] [2021-06-05 04:32:57,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:57,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:57,805 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:57,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:57,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107490507] [2021-06-05 04:32:57,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107490507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:57,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576882700] [2021-06-05 04:32:57,805 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:57,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:57,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:32:57,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:58,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:58,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:58,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:32:58,038 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:58,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:58,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:32:58,041 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:58,064 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:32:58,065 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:32:58,065 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:32:58,065 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:32:58,089 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:58,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576882700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:58,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:58,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 04:32:58,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200721550] [2021-06-05 04:32:58,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:32:58,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:58,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:32:58,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:32:58,090 INFO L87 Difference]: Start difference. First operand 1644 states and 4840 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:58,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:32:58,922 INFO L93 Difference]: Finished difference Result 2501 states and 6947 transitions. [2021-06-05 04:32:58,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 04:32:58,923 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:32:58,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:32:58,926 INFO L225 Difference]: With dead ends: 2501 [2021-06-05 04:32:58,926 INFO L226 Difference]: Without dead ends: 2501 [2021-06-05 04:32:58,926 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 738.0ms TimeCoverageRelationStatistics Valid=192, Invalid=1530, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 04:32:58,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2501 states. [2021-06-05 04:32:58,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2501 to 1656. [2021-06-05 04:32:58,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1656 states, 1655 states have (on average 2.950453172205438) internal successors, (4883), 1655 states have internal predecessors, (4883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:58,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 4883 transitions. [2021-06-05 04:32:58,945 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 4883 transitions. Word has length 19 [2021-06-05 04:32:58,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:32:58,946 INFO L482 AbstractCegarLoop]: Abstraction has 1656 states and 4883 transitions. [2021-06-05 04:32:58,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:32:58,946 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 4883 transitions. [2021-06-05 04:32:58,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:32:58,947 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:32:58,947 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:32:59,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3606,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:59,148 INFO L430 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:32:59,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:32:59,148 INFO L82 PathProgramCache]: Analyzing trace with hash 928667608, now seen corresponding path program 404 times [2021-06-05 04:32:59,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:32:59,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551086976] [2021-06-05 04:32:59,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:32:59,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:32:59,263 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:59,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:32:59,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551086976] [2021-06-05 04:32:59,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551086976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:59,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295507664] [2021-06-05 04:32:59,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:32:59,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:32:59,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:32:59,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:32:59,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:32:59,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:59,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:59,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:32:59,483 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:59,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:32:59,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:32:59,487 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:32:59,510 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:32:59,510 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:32:59,511 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:32:59,511 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:32:59,535 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:32:59,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295507664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:32:59,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:32:59,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 04:32:59,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540311171] [2021-06-05 04:32:59,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:32:59,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:32:59,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:32:59,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:32:59,536 INFO L87 Difference]: Start difference. First operand 1656 states and 4883 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:01,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:01,037 INFO L93 Difference]: Finished difference Result 2631 states and 7221 transitions. [2021-06-05 04:33:01,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 04:33:01,038 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:33:01,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:01,040 INFO L225 Difference]: With dead ends: 2631 [2021-06-05 04:33:01,040 INFO L226 Difference]: Without dead ends: 2631 [2021-06-05 04:33:01,040 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 1322.7ms TimeCoverageRelationStatistics Valid=400, Invalid=3382, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 04:33:01,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2631 states. [2021-06-05 04:33:01,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2631 to 1677. [2021-06-05 04:33:01,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1677 states, 1676 states have (on average 2.95763723150358) internal successors, (4957), 1676 states have internal predecessors, (4957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:01,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1677 states to 1677 states and 4957 transitions. [2021-06-05 04:33:01,058 INFO L78 Accepts]: Start accepts. Automaton has 1677 states and 4957 transitions. Word has length 19 [2021-06-05 04:33:01,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:01,058 INFO L482 AbstractCegarLoop]: Abstraction has 1677 states and 4957 transitions. [2021-06-05 04:33:01,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:01,058 INFO L276 IsEmpty]: Start isEmpty. Operand 1677 states and 4957 transitions. [2021-06-05 04:33:01,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:33:01,060 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:01,060 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:01,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 409 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3609 [2021-06-05 04:33:01,260 INFO L430 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:01,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:01,261 INFO L82 PathProgramCache]: Analyzing trace with hash 2001752988, now seen corresponding path program 405 times [2021-06-05 04:33:01,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:01,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070395638] [2021-06-05 04:33:01,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:01,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:01,372 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:01,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:01,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070395638] [2021-06-05 04:33:01,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070395638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:01,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489343153] [2021-06-05 04:33:01,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:01,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:33:01,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:01,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:33:01,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:01,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:01,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:01,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:33:01,579 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:01,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:01,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:33:01,583 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:01,606 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:33:01,606 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:33:01,606 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:33:01,606 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:33:01,630 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:01,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489343153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:01,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:01,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 04:33:01,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846946499] [2021-06-05 04:33:01,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:33:01,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:01,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:33:01,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:33:01,631 INFO L87 Difference]: Start difference. First operand 1677 states and 4957 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:02,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:02,520 INFO L93 Difference]: Finished difference Result 2498 states and 7046 transitions. [2021-06-05 04:33:02,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 04:33:02,520 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:33:02,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:02,523 INFO L225 Difference]: With dead ends: 2498 [2021-06-05 04:33:02,523 INFO L226 Difference]: Without dead ends: 2498 [2021-06-05 04:33:02,523 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 754.2ms TimeCoverageRelationStatistics Valid=188, Invalid=1218, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 04:33:02,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2498 states. [2021-06-05 04:33:02,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2498 to 1679. [2021-06-05 04:33:02,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1679 states, 1678 states have (on average 2.957687723480334) internal successors, (4963), 1678 states have internal predecessors, (4963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:02,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1679 states to 1679 states and 4963 transitions. [2021-06-05 04:33:02,541 INFO L78 Accepts]: Start accepts. Automaton has 1679 states and 4963 transitions. Word has length 19 [2021-06-05 04:33:02,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:02,541 INFO L482 AbstractCegarLoop]: Abstraction has 1679 states and 4963 transitions. [2021-06-05 04:33:02,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:02,541 INFO L276 IsEmpty]: Start isEmpty. Operand 1679 states and 4963 transitions. [2021-06-05 04:33:02,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:33:02,543 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:02,543 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:02,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3612,410 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:02,743 INFO L430 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:02,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:02,744 INFO L82 PathProgramCache]: Analyzing trace with hash 907661400, now seen corresponding path program 406 times [2021-06-05 04:33:02,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:02,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746283873] [2021-06-05 04:33:02,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:02,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:02,883 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:02,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:02,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746283873] [2021-06-05 04:33:02,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746283873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:02,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318054075] [2021-06-05 04:33:02,884 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:02,912 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:33:02,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:02,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:33:02,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:03,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:03,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:03,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:33:03,080 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:03,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:03,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:33:03,083 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:03,107 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:33:03,107 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:33:03,107 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:33:03,107 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:33:03,131 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:03,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318054075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:03,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:03,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 04:33:03,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092120893] [2021-06-05 04:33:03,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:33:03,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:03,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:33:03,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:33:03,132 INFO L87 Difference]: Start difference. First operand 1679 states and 4963 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:03,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:03,365 INFO L93 Difference]: Finished difference Result 2398 states and 6821 transitions. [2021-06-05 04:33:03,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:33:03,365 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:33:03,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:03,367 INFO L225 Difference]: With dead ends: 2398 [2021-06-05 04:33:03,367 INFO L226 Difference]: Without dead ends: 2398 [2021-06-05 04:33:03,367 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 255.9ms TimeCoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:33:03,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2398 states. [2021-06-05 04:33:03,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2398 to 1679. [2021-06-05 04:33:03,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1679 states, 1678 states have (on average 2.957687723480334) internal successors, (4963), 1678 states have internal predecessors, (4963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:03,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1679 states to 1679 states and 4963 transitions. [2021-06-05 04:33:03,385 INFO L78 Accepts]: Start accepts. Automaton has 1679 states and 4963 transitions. Word has length 19 [2021-06-05 04:33:03,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:03,385 INFO L482 AbstractCegarLoop]: Abstraction has 1679 states and 4963 transitions. [2021-06-05 04:33:03,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:03,385 INFO L276 IsEmpty]: Start isEmpty. Operand 1679 states and 4963 transitions. [2021-06-05 04:33:03,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:33:03,387 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:03,387 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:03,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3615,411 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:03,587 INFO L430 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:03,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:03,587 INFO L82 PathProgramCache]: Analyzing trace with hash -2048945378, now seen corresponding path program 407 times [2021-06-05 04:33:03,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:03,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021371214] [2021-06-05 04:33:03,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:03,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:03,689 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:03,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:03,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021371214] [2021-06-05 04:33:03,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021371214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:03,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215976848] [2021-06-05 04:33:03,689 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:03,720 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:33:03,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:03,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:33:03,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:03,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:03,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:03,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:33:03,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:03,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:03,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:33:03,853 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:03,871 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-06-05 04:33:03,871 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:33:03,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:33:03,872 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-06-05 04:33:03,897 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:03,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215976848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:03,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:03,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 04:33:03,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852506247] [2021-06-05 04:33:03,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:33:03,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:03,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:33:03,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:33:03,898 INFO L87 Difference]: Start difference. First operand 1679 states and 4963 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:04,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:04,472 INFO L93 Difference]: Finished difference Result 2275 states and 6399 transitions. [2021-06-05 04:33:04,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 04:33:04,472 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:33:04,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:04,474 INFO L225 Difference]: With dead ends: 2275 [2021-06-05 04:33:04,475 INFO L226 Difference]: Without dead ends: 2275 [2021-06-05 04:33:04,475 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 378.9ms TimeCoverageRelationStatistics Valid=110, Invalid=1080, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:33:04,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2275 states. [2021-06-05 04:33:04,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2275 to 1869. [2021-06-05 04:33:04,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1869 states, 1868 states have (on average 2.975374732334047) internal successors, (5558), 1868 states have internal predecessors, (5558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:04,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1869 states to 1869 states and 5558 transitions. [2021-06-05 04:33:04,495 INFO L78 Accepts]: Start accepts. Automaton has 1869 states and 5558 transitions. Word has length 19 [2021-06-05 04:33:04,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:04,495 INFO L482 AbstractCegarLoop]: Abstraction has 1869 states and 5558 transitions. [2021-06-05 04:33:04,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:04,495 INFO L276 IsEmpty]: Start isEmpty. Operand 1869 states and 5558 transitions. [2021-06-05 04:33:04,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:33:04,497 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:04,497 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:04,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3618 [2021-06-05 04:33:04,697 INFO L430 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:04,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:04,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1326321210, now seen corresponding path program 408 times [2021-06-05 04:33:04,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:04,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132393642] [2021-06-05 04:33:04,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:04,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:04,816 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:04,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:04,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132393642] [2021-06-05 04:33:04,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132393642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:04,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054708539] [2021-06-05 04:33:04,816 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:04,847 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:33:04,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:04,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:33:04,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:04,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:04,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:04,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:33:04,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:04,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:04,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:04,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:33:04,985 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:04,987 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:33:04,987 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:04,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:33:04,990 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:04,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:33:04,993 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:04,995 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:33:04,995 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:05,024 INFO L628 ElimStorePlain]: treesize reduction 21, result has 58.0 percent of original size [2021-06-05 04:33:05,025 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:33:05,025 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:33:05,025 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-06-05 04:33:05,060 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:05,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054708539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:05,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:05,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 04:33:05,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906460639] [2021-06-05 04:33:05,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:33:05,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:05,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:33:05,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:33:05,061 INFO L87 Difference]: Start difference. First operand 1869 states and 5558 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:05,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:05,714 INFO L93 Difference]: Finished difference Result 2176 states and 6183 transitions. [2021-06-05 04:33:05,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 04:33:05,715 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:33:05,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:05,717 INFO L225 Difference]: With dead ends: 2176 [2021-06-05 04:33:05,718 INFO L226 Difference]: Without dead ends: 2172 [2021-06-05 04:33:05,718 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 544.4ms TimeCoverageRelationStatistics Valid=143, Invalid=1339, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 04:33:05,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-06-05 04:33:05,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 1869. [2021-06-05 04:33:05,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1869 states, 1868 states have (on average 2.96948608137045) internal successors, (5547), 1868 states have internal predecessors, (5547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:05,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1869 states to 1869 states and 5547 transitions. [2021-06-05 04:33:05,737 INFO L78 Accepts]: Start accepts. Automaton has 1869 states and 5547 transitions. Word has length 19 [2021-06-05 04:33:05,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:05,737 INFO L482 AbstractCegarLoop]: Abstraction has 1869 states and 5547 transitions. [2021-06-05 04:33:05,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:05,737 INFO L276 IsEmpty]: Start isEmpty. Operand 1869 states and 5547 transitions. [2021-06-05 04:33:05,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:33:05,739 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:05,739 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:05,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3620,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:05,940 INFO L430 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:05,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:05,940 INFO L82 PathProgramCache]: Analyzing trace with hash -2041214980, now seen corresponding path program 409 times [2021-06-05 04:33:05,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:05,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484703312] [2021-06-05 04:33:05,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:05,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:06,048 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:06,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:06,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484703312] [2021-06-05 04:33:06,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484703312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:06,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109320826] [2021-06-05 04:33:06,048 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:06,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:06,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:33:06,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:06,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:06,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:06,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:33:06,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:06,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:06,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:06,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:33:06,199 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:06,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:06,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:06,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:33:06,203 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:06,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:06,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:33:06,206 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:06,241 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:33:06,241 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:33:06,241 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:33:06,241 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:33:06,299 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:06,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109320826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:06,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:06,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 04:33:06,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974852708] [2021-06-05 04:33:06,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:33:06,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:06,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:33:06,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:33:06,300 INFO L87 Difference]: Start difference. First operand 1869 states and 5547 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:07,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:07,099 INFO L93 Difference]: Finished difference Result 2281 states and 6397 transitions. [2021-06-05 04:33:07,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 04:33:07,100 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:33:07,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:07,102 INFO L225 Difference]: With dead ends: 2281 [2021-06-05 04:33:07,102 INFO L226 Difference]: Without dead ends: 2280 [2021-06-05 04:33:07,102 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 507.6ms TimeCoverageRelationStatistics Valid=137, Invalid=1269, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 04:33:07,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2280 states. [2021-06-05 04:33:07,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2280 to 1877. [2021-06-05 04:33:07,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1877 states, 1876 states have (on average 2.9738805970149254) internal successors, (5579), 1876 states have internal predecessors, (5579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:07,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1877 states to 1877 states and 5579 transitions. [2021-06-05 04:33:07,122 INFO L78 Accepts]: Start accepts. Automaton has 1877 states and 5579 transitions. Word has length 19 [2021-06-05 04:33:07,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:07,122 INFO L482 AbstractCegarLoop]: Abstraction has 1877 states and 5579 transitions. [2021-06-05 04:33:07,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:07,122 INFO L276 IsEmpty]: Start isEmpty. Operand 1877 states and 5579 transitions. [2021-06-05 04:33:07,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:33:07,124 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:07,124 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:07,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3625 [2021-06-05 04:33:07,325 INFO L430 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:07,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:07,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1239598752, now seen corresponding path program 410 times [2021-06-05 04:33:07,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:07,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980167967] [2021-06-05 04:33:07,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:07,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:07,432 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:07,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:07,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980167967] [2021-06-05 04:33:07,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980167967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:07,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229447315] [2021-06-05 04:33:07,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:07,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:33:07,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:07,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:33:07,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:07,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:07,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:07,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:33:07,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:07,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:07,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:07,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:33:07,586 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:07,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:07,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:07,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:33:07,590 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:07,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:07,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:33:07,593 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:07,628 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:33:07,628 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:33:07,628 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:33:07,628 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:33:07,706 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:07,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229447315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:07,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:07,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 04:33:07,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640977459] [2021-06-05 04:33:07,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:33:07,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:07,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:33:07,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:33:07,707 INFO L87 Difference]: Start difference. First operand 1877 states and 5579 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:08,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:08,789 INFO L93 Difference]: Finished difference Result 2324 states and 6523 transitions. [2021-06-05 04:33:08,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 04:33:08,790 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:33:08,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:08,792 INFO L225 Difference]: With dead ends: 2324 [2021-06-05 04:33:08,792 INFO L226 Difference]: Without dead ends: 2320 [2021-06-05 04:33:08,792 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 854.6ms TimeCoverageRelationStatistics Valid=240, Invalid=2210, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 04:33:08,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2320 states. [2021-06-05 04:33:08,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2320 to 1900. [2021-06-05 04:33:08,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1900 states, 1899 states have (on average 2.9768299104791995) internal successors, (5653), 1899 states have internal predecessors, (5653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:08,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1900 states to 1900 states and 5653 transitions. [2021-06-05 04:33:08,812 INFO L78 Accepts]: Start accepts. Automaton has 1900 states and 5653 transitions. Word has length 19 [2021-06-05 04:33:08,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:08,812 INFO L482 AbstractCegarLoop]: Abstraction has 1900 states and 5653 transitions. [2021-06-05 04:33:08,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:08,812 INFO L276 IsEmpty]: Start isEmpty. Operand 1900 states and 5653 transitions. [2021-06-05 04:33:08,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:33:08,814 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:08,814 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:09,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 415 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3629 [2021-06-05 04:33:09,014 INFO L430 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:09,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:09,015 INFO L82 PathProgramCache]: Analyzing trace with hash 478744954, now seen corresponding path program 411 times [2021-06-05 04:33:09,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:09,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952570545] [2021-06-05 04:33:09,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:09,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:09,124 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:09,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:09,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952570545] [2021-06-05 04:33:09,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952570545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:09,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348836022] [2021-06-05 04:33:09,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:09,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:33:09,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:09,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:33:09,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:09,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:09,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:09,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:33:09,264 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:09,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:09,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:09,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:33:09,268 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:09,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:09,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:09,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:33:09,271 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:09,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:09,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:33:09,274 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:09,309 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:33:09,309 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:33:09,309 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:33:09,309 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:33:09,364 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:09,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348836022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:09,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:09,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 04:33:09,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645183408] [2021-06-05 04:33:09,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:33:09,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:09,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:33:09,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:33:09,365 INFO L87 Difference]: Start difference. First operand 1900 states and 5653 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:10,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:10,220 INFO L93 Difference]: Finished difference Result 2307 states and 6474 transitions. [2021-06-05 04:33:10,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 04:33:10,220 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:33:10,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:10,222 INFO L225 Difference]: With dead ends: 2307 [2021-06-05 04:33:10,222 INFO L226 Difference]: Without dead ends: 2307 [2021-06-05 04:33:10,223 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 718.6ms TimeCoverageRelationStatistics Valid=208, Invalid=1598, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 04:33:10,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2307 states. [2021-06-05 04:33:10,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2307 to 1863. [2021-06-05 04:33:10,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1863 states, 1862 states have (on average 2.9667024704618687) internal successors, (5524), 1862 states have internal predecessors, (5524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:10,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1863 states to 1863 states and 5524 transitions. [2021-06-05 04:33:10,241 INFO L78 Accepts]: Start accepts. Automaton has 1863 states and 5524 transitions. Word has length 19 [2021-06-05 04:33:10,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:10,241 INFO L482 AbstractCegarLoop]: Abstraction has 1863 states and 5524 transitions. [2021-06-05 04:33:10,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:10,241 INFO L276 IsEmpty]: Start isEmpty. Operand 1863 states and 5524 transitions. [2021-06-05 04:33:10,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:33:10,243 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:10,243 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:10,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3634,416 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:10,443 INFO L430 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:10,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:10,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1923098790, now seen corresponding path program 412 times [2021-06-05 04:33:10,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:10,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491087852] [2021-06-05 04:33:10,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:10,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:10,554 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:10,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:10,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491087852] [2021-06-05 04:33:10,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491087852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:10,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447809155] [2021-06-05 04:33:10,555 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:10,583 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:33:10,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:10,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:33:10,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:10,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:10,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:10,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:33:10,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:10,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:10,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:10,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:33:10,693 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:10,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:10,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:10,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:33:10,696 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:10,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:10,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:33:10,699 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:10,734 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:33:10,734 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:33:10,735 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:33:10,735 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:33:10,803 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:10,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447809155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:10,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:10,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 04:33:10,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191938475] [2021-06-05 04:33:10,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:33:10,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:10,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:33:10,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:33:10,804 INFO L87 Difference]: Start difference. First operand 1863 states and 5524 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:11,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:11,945 INFO L93 Difference]: Finished difference Result 2314 states and 6477 transitions. [2021-06-05 04:33:11,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 04:33:11,946 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:33:11,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:11,948 INFO L225 Difference]: With dead ends: 2314 [2021-06-05 04:33:11,948 INFO L226 Difference]: Without dead ends: 2309 [2021-06-05 04:33:11,948 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 753.4ms TimeCoverageRelationStatistics Valid=242, Invalid=2620, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 04:33:11,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2309 states. [2021-06-05 04:33:11,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2309 to 1904. [2021-06-05 04:33:11,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1904 states, 1903 states have (on average 2.974776668418287) internal successors, (5661), 1903 states have internal predecessors, (5661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:11,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1904 states to 1904 states and 5661 transitions. [2021-06-05 04:33:11,967 INFO L78 Accepts]: Start accepts. Automaton has 1904 states and 5661 transitions. Word has length 19 [2021-06-05 04:33:11,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:11,968 INFO L482 AbstractCegarLoop]: Abstraction has 1904 states and 5661 transitions. [2021-06-05 04:33:11,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:11,968 INFO L276 IsEmpty]: Start isEmpty. Operand 1904 states and 5661 transitions. [2021-06-05 04:33:11,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:33:11,969 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:11,969 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:12,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 417 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3638 [2021-06-05 04:33:12,170 INFO L430 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:12,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:12,170 INFO L82 PathProgramCache]: Analyzing trace with hash -194051456, now seen corresponding path program 413 times [2021-06-05 04:33:12,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:12,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208436244] [2021-06-05 04:33:12,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:12,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:12,275 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:12,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:12,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208436244] [2021-06-05 04:33:12,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208436244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:12,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597208744] [2021-06-05 04:33:12,275 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:12,304 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:33:12,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:12,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:33:12,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:12,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:33:12,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:12,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:33:12,462 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:12,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:12,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:12,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:33:12,466 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:12,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:33:12,470 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:12,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:33:12,473 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:12,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:12,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:33:12,476 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:12,507 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-05 04:33:12,507 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:33:12,508 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:33:12,508 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-05 04:33:12,538 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:12,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597208744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:12,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:12,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 04:33:12,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089268343] [2021-06-05 04:33:12,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:33:12,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:12,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:33:12,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:33:12,539 INFO L87 Difference]: Start difference. First operand 1904 states and 5661 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:13,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:13,280 INFO L93 Difference]: Finished difference Result 2210 states and 6281 transitions. [2021-06-05 04:33:13,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 04:33:13,281 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:33:13,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:13,283 INFO L225 Difference]: With dead ends: 2210 [2021-06-05 04:33:13,283 INFO L226 Difference]: Without dead ends: 2202 [2021-06-05 04:33:13,283 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 540.4ms TimeCoverageRelationStatistics Valid=158, Invalid=1564, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 04:33:13,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2202 states. [2021-06-05 04:33:13,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2202 to 1908. [2021-06-05 04:33:13,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1908 states, 1907 states have (on average 2.966439433665443) internal successors, (5657), 1907 states have internal predecessors, (5657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:13,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1908 states to 1908 states and 5657 transitions. [2021-06-05 04:33:13,302 INFO L78 Accepts]: Start accepts. Automaton has 1908 states and 5657 transitions. Word has length 19 [2021-06-05 04:33:13,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:13,302 INFO L482 AbstractCegarLoop]: Abstraction has 1908 states and 5657 transitions. [2021-06-05 04:33:13,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:13,302 INFO L276 IsEmpty]: Start isEmpty. Operand 1908 states and 5657 transitions. [2021-06-05 04:33:13,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:33:13,304 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:13,304 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:13,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3644,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:13,505 INFO L430 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:13,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:13,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1573693946, now seen corresponding path program 414 times [2021-06-05 04:33:13,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:13,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178757498] [2021-06-05 04:33:13,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:13,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:13,610 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:13,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:13,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178757498] [2021-06-05 04:33:13,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178757498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:13,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412200803] [2021-06-05 04:33:13,611 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:13,641 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:33:13,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:13,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:33:13,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:13,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:13,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:13,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:33:13,775 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:13,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:13,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:33:13,779 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:13,801 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:33:13,802 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:33:13,802 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:33:13,802 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:33:13,825 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:13,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412200803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:13,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:13,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 04:33:13,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285050511] [2021-06-05 04:33:13,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:33:13,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:13,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:33:13,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:33:13,825 INFO L87 Difference]: Start difference. First operand 1908 states and 5657 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:14,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:14,660 INFO L93 Difference]: Finished difference Result 2517 states and 6946 transitions. [2021-06-05 04:33:14,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 04:33:14,660 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:33:14,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:14,662 INFO L225 Difference]: With dead ends: 2517 [2021-06-05 04:33:14,663 INFO L226 Difference]: Without dead ends: 2517 [2021-06-05 04:33:14,663 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 521.0ms TimeCoverageRelationStatistics Valid=184, Invalid=1796, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 04:33:14,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2517 states. [2021-06-05 04:33:14,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2517 to 1947. [2021-06-05 04:33:14,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1947 states, 1946 states have (on average 2.9676258992805757) internal successors, (5775), 1946 states have internal predecessors, (5775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:14,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1947 states to 1947 states and 5775 transitions. [2021-06-05 04:33:14,683 INFO L78 Accepts]: Start accepts. Automaton has 1947 states and 5775 transitions. Word has length 19 [2021-06-05 04:33:14,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:14,683 INFO L482 AbstractCegarLoop]: Abstraction has 1947 states and 5775 transitions. [2021-06-05 04:33:14,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:14,683 INFO L276 IsEmpty]: Start isEmpty. Operand 1947 states and 5775 transitions. [2021-06-05 04:33:14,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:33:14,686 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:14,686 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:14,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3651,419 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:14,886 INFO L430 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:14,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:14,886 INFO L82 PathProgramCache]: Analyzing trace with hash -850013410, now seen corresponding path program 415 times [2021-06-05 04:33:14,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:14,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308655684] [2021-06-05 04:33:14,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:14,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:14,998 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:14,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:14,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308655684] [2021-06-05 04:33:14,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308655684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:14,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038563989] [2021-06-05 04:33:14,998 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:15,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:15,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:33:15,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:15,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:15,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:15,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:33:15,143 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:15,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:15,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:15,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:33:15,147 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:15,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:15,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:15,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:33:15,150 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:15,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:15,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:33:15,153 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:15,187 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:33:15,188 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:33:15,188 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:33:15,188 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:33:15,257 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:15,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038563989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:15,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:15,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 04:33:15,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399206797] [2021-06-05 04:33:15,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:33:15,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:15,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:33:15,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:33:15,257 INFO L87 Difference]: Start difference. First operand 1947 states and 5775 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:16,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:16,006 INFO L93 Difference]: Finished difference Result 2360 states and 6719 transitions. [2021-06-05 04:33:16,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 04:33:16,006 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:33:16,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:16,008 INFO L225 Difference]: With dead ends: 2360 [2021-06-05 04:33:16,008 INFO L226 Difference]: Without dead ends: 2356 [2021-06-05 04:33:16,009 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 536.9ms TimeCoverageRelationStatistics Valid=146, Invalid=1414, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 04:33:16,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2356 states. [2021-06-05 04:33:16,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2356 to 2033. [2021-06-05 04:33:16,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2033 states, 2032 states have (on average 2.979330708661417) internal successors, (6054), 2032 states have internal predecessors, (6054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:16,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2033 states to 2033 states and 6054 transitions. [2021-06-05 04:33:16,029 INFO L78 Accepts]: Start accepts. Automaton has 2033 states and 6054 transitions. Word has length 19 [2021-06-05 04:33:16,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:16,029 INFO L482 AbstractCegarLoop]: Abstraction has 2033 states and 6054 transitions. [2021-06-05 04:33:16,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:16,029 INFO L276 IsEmpty]: Start isEmpty. Operand 2033 states and 6054 transitions. [2021-06-05 04:33:16,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:33:16,031 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:16,031 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:16,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3654,420 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:16,231 INFO L430 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:16,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:16,232 INFO L82 PathProgramCache]: Analyzing trace with hash 879033924, now seen corresponding path program 416 times [2021-06-05 04:33:16,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:16,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672717756] [2021-06-05 04:33:16,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:16,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:16,341 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:16,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:16,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672717756] [2021-06-05 04:33:16,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672717756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:16,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662598370] [2021-06-05 04:33:16,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:16,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:33:16,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:16,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:33:16,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:16,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:33:16,539 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:16,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:33:16,542 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:16,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:16,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:16,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:33:16,546 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:16,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:33:16,549 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:16,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:33:16,552 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:16,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:16,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:33:16,556 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:16,587 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-05 04:33:16,587 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:33:16,588 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:33:16,588 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-05 04:33:16,617 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:16,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662598370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:16,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:16,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 04:33:16,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634932919] [2021-06-05 04:33:16,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:33:16,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:16,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:33:16,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:33:16,618 INFO L87 Difference]: Start difference. First operand 2033 states and 6054 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:17,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:17,291 INFO L93 Difference]: Finished difference Result 2349 states and 6703 transitions. [2021-06-05 04:33:17,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 04:33:17,291 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:33:17,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:17,294 INFO L225 Difference]: With dead ends: 2349 [2021-06-05 04:33:17,294 INFO L226 Difference]: Without dead ends: 2341 [2021-06-05 04:33:17,294 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 533.4ms TimeCoverageRelationStatistics Valid=149, Invalid=1333, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 04:33:17,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2341 states. [2021-06-05 04:33:17,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2341 to 2045. [2021-06-05 04:33:17,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2045 states, 2044 states have (on average 2.9779843444227008) internal successors, (6087), 2044 states have internal predecessors, (6087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:17,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2045 states to 2045 states and 6087 transitions. [2021-06-05 04:33:17,314 INFO L78 Accepts]: Start accepts. Automaton has 2045 states and 6087 transitions. Word has length 19 [2021-06-05 04:33:17,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:17,314 INFO L482 AbstractCegarLoop]: Abstraction has 2045 states and 6087 transitions. [2021-06-05 04:33:17,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:17,314 INFO L276 IsEmpty]: Start isEmpty. Operand 2045 states and 6087 transitions. [2021-06-05 04:33:17,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:33:17,316 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:17,316 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:17,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 421 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3660 [2021-06-05 04:33:17,516 INFO L430 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:17,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:17,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1355073570, now seen corresponding path program 417 times [2021-06-05 04:33:17,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:17,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005890619] [2021-06-05 04:33:17,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:17,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:17,617 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:17,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:17,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005890619] [2021-06-05 04:33:17,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005890619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:17,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485607087] [2021-06-05 04:33:17,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:17,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:33:17,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:17,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:33:17,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:17,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:33:17,818 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:17,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:33:17,821 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:17,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:17,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:17,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:33:17,825 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:17,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:33:17,828 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:17,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:33:17,831 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:17,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:17,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:33:17,835 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:17,866 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-05 04:33:17,866 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:33:17,867 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:33:17,867 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-05 04:33:17,897 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:17,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485607087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:17,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:17,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 04:33:17,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792031368] [2021-06-05 04:33:17,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:33:17,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:17,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:33:17,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:33:17,897 INFO L87 Difference]: Start difference. First operand 2045 states and 6087 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:18,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:18,580 INFO L93 Difference]: Finished difference Result 2336 states and 6674 transitions. [2021-06-05 04:33:18,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 04:33:18,581 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:33:18,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:18,583 INFO L225 Difference]: With dead ends: 2336 [2021-06-05 04:33:18,583 INFO L226 Difference]: Without dead ends: 2324 [2021-06-05 04:33:18,584 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 532.3ms TimeCoverageRelationStatistics Valid=146, Invalid=1336, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 04:33:18,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2324 states. [2021-06-05 04:33:18,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2324 to 2053. [2021-06-05 04:33:18,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2053 states, 2052 states have (on average 2.9683235867446394) internal successors, (6091), 2052 states have internal predecessors, (6091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:18,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2053 states to 2053 states and 6091 transitions. [2021-06-05 04:33:18,604 INFO L78 Accepts]: Start accepts. Automaton has 2053 states and 6091 transitions. Word has length 19 [2021-06-05 04:33:18,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:18,604 INFO L482 AbstractCegarLoop]: Abstraction has 2053 states and 6091 transitions. [2021-06-05 04:33:18,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:18,604 INFO L276 IsEmpty]: Start isEmpty. Operand 2053 states and 6091 transitions. [2021-06-05 04:33:18,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:33:18,606 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:18,606 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:18,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3667,422 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:18,806 INFO L430 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:18,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:18,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1157374330, now seen corresponding path program 418 times [2021-06-05 04:33:18,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:18,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303724478] [2021-06-05 04:33:18,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:18,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:18,907 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:18,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:18,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303724478] [2021-06-05 04:33:18,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303724478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:18,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240605518] [2021-06-05 04:33:18,908 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:18,936 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:33:18,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:18,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:33:18,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:19,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:19,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:19,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:33:19,080 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:19,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:19,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:33:19,084 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:19,107 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:33:19,107 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:33:19,108 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:33:19,108 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:33:19,131 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:19,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240605518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:19,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:19,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 04:33:19,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225296657] [2021-06-05 04:33:19,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:33:19,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:19,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:33:19,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:33:19,131 INFO L87 Difference]: Start difference. First operand 2053 states and 6091 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:20,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:20,214 INFO L93 Difference]: Finished difference Result 2605 states and 7193 transitions. [2021-06-05 04:33:20,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 04:33:20,214 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:33:20,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:20,217 INFO L225 Difference]: With dead ends: 2605 [2021-06-05 04:33:20,217 INFO L226 Difference]: Without dead ends: 2601 [2021-06-05 04:33:20,217 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 644.0ms TimeCoverageRelationStatistics Valid=225, Invalid=2127, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 04:33:20,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2601 states. [2021-06-05 04:33:20,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2601 to 2058. [2021-06-05 04:33:20,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2058 states, 2057 states have (on average 2.9679144385026737) internal successors, (6105), 2057 states have internal predecessors, (6105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:20,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2058 states to 2058 states and 6105 transitions. [2021-06-05 04:33:20,238 INFO L78 Accepts]: Start accepts. Automaton has 2058 states and 6105 transitions. Word has length 19 [2021-06-05 04:33:20,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:20,238 INFO L482 AbstractCegarLoop]: Abstraction has 2058 states and 6105 transitions. [2021-06-05 04:33:20,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:20,238 INFO L276 IsEmpty]: Start isEmpty. Operand 2058 states and 6105 transitions. [2021-06-05 04:33:20,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:33:20,240 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:20,240 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:20,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3674,423 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:20,440 INFO L430 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:20,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:20,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1944104998, now seen corresponding path program 419 times [2021-06-05 04:33:20,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:20,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573924165] [2021-06-05 04:33:20,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:20,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:20,560 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:20,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:20,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573924165] [2021-06-05 04:33:20,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573924165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:20,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198854676] [2021-06-05 04:33:20,561 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:20,590 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:33:20,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:20,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:33:20,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:20,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:20,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:20,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:33:20,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:20,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:20,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:20,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:33:20,722 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:20,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:20,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:20,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:33:20,726 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:20,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:20,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:33:20,729 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:20,775 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:33:20,775 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:33:20,776 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:33:20,776 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:33:20,844 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:20,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198854676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:20,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:20,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 04:33:20,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640654206] [2021-06-05 04:33:20,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:33:20,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:20,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:33:20,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:33:20,845 INFO L87 Difference]: Start difference. First operand 2058 states and 6105 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:21,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:21,575 INFO L93 Difference]: Finished difference Result 2431 states and 6944 transitions. [2021-06-05 04:33:21,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 04:33:21,575 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:33:21,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:21,578 INFO L225 Difference]: With dead ends: 2431 [2021-06-05 04:33:21,578 INFO L226 Difference]: Without dead ends: 2427 [2021-06-05 04:33:21,578 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 551.7ms TimeCoverageRelationStatistics Valid=139, Invalid=1193, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 04:33:21,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2427 states. [2021-06-05 04:33:21,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2427 to 2116. [2021-06-05 04:33:21,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2116 states, 2115 states have (on average 2.9749408983451535) internal successors, (6292), 2115 states have internal predecessors, (6292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:21,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2116 states to 2116 states and 6292 transitions. [2021-06-05 04:33:21,599 INFO L78 Accepts]: Start accepts. Automaton has 2116 states and 6292 transitions. Word has length 19 [2021-06-05 04:33:21,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:21,599 INFO L482 AbstractCegarLoop]: Abstraction has 2116 states and 6292 transitions. [2021-06-05 04:33:21,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:21,599 INFO L276 IsEmpty]: Start isEmpty. Operand 2116 states and 6292 transitions. [2021-06-05 04:33:21,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:33:21,601 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:21,601 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:21,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3677,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:21,802 INFO L430 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:21,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:21,802 INFO L82 PathProgramCache]: Analyzing trace with hash -215057664, now seen corresponding path program 420 times [2021-06-05 04:33:21,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:21,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772379322] [2021-06-05 04:33:21,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:21,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:21,913 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:21,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:21,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772379322] [2021-06-05 04:33:21,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772379322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:21,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266233371] [2021-06-05 04:33:21,913 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:21,942 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:33:21,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:21,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:33:21,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:22,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:33:22,126 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:22,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:33:22,129 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:22,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:22,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:22,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:33:22,133 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:22,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:33:22,146 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:22,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:33:22,151 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:22,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:22,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:33:22,155 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:22,192 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-05 04:33:22,193 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:33:22,194 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:33:22,194 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-05 04:33:22,223 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:22,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266233371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:22,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:22,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 04:33:22,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048181699] [2021-06-05 04:33:22,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:33:22,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:22,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:33:22,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:33:22,224 INFO L87 Difference]: Start difference. First operand 2116 states and 6292 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:22,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:22,770 INFO L93 Difference]: Finished difference Result 2391 states and 6848 transitions. [2021-06-05 04:33:22,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 04:33:22,770 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:33:22,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:22,773 INFO L225 Difference]: With dead ends: 2391 [2021-06-05 04:33:22,773 INFO L226 Difference]: Without dead ends: 2383 [2021-06-05 04:33:22,773 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 495.7ms TimeCoverageRelationStatistics Valid=118, Invalid=1004, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 04:33:22,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2383 states. [2021-06-05 04:33:22,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2383 to 2116. [2021-06-05 04:33:22,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2116 states, 2115 states have (on average 2.9735224586288416) internal successors, (6289), 2115 states have internal predecessors, (6289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:22,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2116 states to 2116 states and 6289 transitions. [2021-06-05 04:33:22,794 INFO L78 Accepts]: Start accepts. Automaton has 2116 states and 6289 transitions. Word has length 19 [2021-06-05 04:33:22,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:22,794 INFO L482 AbstractCegarLoop]: Abstraction has 2116 states and 6289 transitions. [2021-06-05 04:33:22,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:22,794 INFO L276 IsEmpty]: Start isEmpty. Operand 2116 states and 6289 transitions. [2021-06-05 04:33:22,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:33:22,796 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:22,796 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:22,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 425 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3683 [2021-06-05 04:33:22,997 INFO L430 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:22,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:22,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1845802138, now seen corresponding path program 421 times [2021-06-05 04:33:22,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:22,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600369195] [2021-06-05 04:33:22,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:23,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:23,106 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:23,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:23,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600369195] [2021-06-05 04:33:23,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600369195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:23,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728732493] [2021-06-05 04:33:23,106 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:23,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:23,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:33:23,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:23,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:33:23,327 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:23,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:33:23,330 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:23,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:23,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:23,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:33:23,334 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:23,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:33:23,337 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:23,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:33:23,340 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:23,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:23,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:33:23,343 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:23,374 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-05 04:33:23,374 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:33:23,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:33:23,375 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-05 04:33:23,405 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:23,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728732493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:23,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:23,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 04:33:23,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018972846] [2021-06-05 04:33:23,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:33:23,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:23,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:33:23,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:33:23,406 INFO L87 Difference]: Start difference. First operand 2116 states and 6289 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:23,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:23,909 INFO L93 Difference]: Finished difference Result 2342 states and 6772 transitions. [2021-06-05 04:33:23,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:33:23,910 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:33:23,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:23,912 INFO L225 Difference]: With dead ends: 2342 [2021-06-05 04:33:23,912 INFO L226 Difference]: Without dead ends: 2330 [2021-06-05 04:33:23,912 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 465.7ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:33:23,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2330 states. [2021-06-05 04:33:23,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2330 to 2116. [2021-06-05 04:33:23,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2116 states, 2115 states have (on average 2.9706855791962177) internal successors, (6283), 2115 states have internal predecessors, (6283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:23,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2116 states to 2116 states and 6283 transitions. [2021-06-05 04:33:23,932 INFO L78 Accepts]: Start accepts. Automaton has 2116 states and 6283 transitions. Word has length 19 [2021-06-05 04:33:23,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:23,932 INFO L482 AbstractCegarLoop]: Abstraction has 2116 states and 6283 transitions. [2021-06-05 04:33:23,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:23,932 INFO L276 IsEmpty]: Start isEmpty. Operand 2116 states and 6283 transitions. [2021-06-05 04:33:23,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:33:23,934 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:23,934 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:24,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3690,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:24,135 INFO L430 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:24,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:24,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1307946560, now seen corresponding path program 422 times [2021-06-05 04:33:24,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:24,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802157880] [2021-06-05 04:33:24,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:24,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:24,239 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:24,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:24,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802157880] [2021-06-05 04:33:24,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802157880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:24,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024905411] [2021-06-05 04:33:24,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:24,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:33:24,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:24,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:33:24,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:24,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:33:24,454 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:24,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:33:24,457 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:24,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:24,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:24,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:33:24,461 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:24,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:33:24,464 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:24,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:33:24,467 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:24,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:24,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:33:24,471 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:24,502 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-05 04:33:24,502 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:33:24,503 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:33:24,503 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-05 04:33:24,534 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:24,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024905411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:24,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:24,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 04:33:24,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456937756] [2021-06-05 04:33:24,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:33:24,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:24,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:33:24,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:33:24,535 INFO L87 Difference]: Start difference. First operand 2116 states and 6283 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:25,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:25,063 INFO L93 Difference]: Finished difference Result 2338 states and 6760 transitions. [2021-06-05 04:33:25,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:33:25,064 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:33:25,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:25,066 INFO L225 Difference]: With dead ends: 2338 [2021-06-05 04:33:25,066 INFO L226 Difference]: Without dead ends: 2322 [2021-06-05 04:33:25,066 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 467.9ms TimeCoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:33:25,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2322 states. [2021-06-05 04:33:25,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2322 to 2118. [2021-06-05 04:33:25,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2118 states, 2117 states have (on average 2.966461974492206) internal successors, (6280), 2117 states have internal predecessors, (6280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:25,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2118 states to 2118 states and 6280 transitions. [2021-06-05 04:33:25,088 INFO L78 Accepts]: Start accepts. Automaton has 2118 states and 6280 transitions. Word has length 19 [2021-06-05 04:33:25,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:25,088 INFO L482 AbstractCegarLoop]: Abstraction has 2118 states and 6280 transitions. [2021-06-05 04:33:25,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:25,088 INFO L276 IsEmpty]: Start isEmpty. Operand 2118 states and 6280 transitions. [2021-06-05 04:33:25,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:33:25,090 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:25,090 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:25,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3697,427 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:25,290 INFO L430 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:25,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:25,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1136368122, now seen corresponding path program 423 times [2021-06-05 04:33:25,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:25,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660028458] [2021-06-05 04:33:25,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:25,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:25,395 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:25,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:25,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660028458] [2021-06-05 04:33:25,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660028458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:25,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052633524] [2021-06-05 04:33:25,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:25,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:33:25,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:25,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:33:25,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:25,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:25,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:25,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:33:25,578 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:25,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:25,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:33:25,581 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:25,605 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:33:25,605 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:33:25,606 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:33:25,606 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:33:25,629 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:25,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052633524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:25,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:25,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 04:33:25,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748854312] [2021-06-05 04:33:25,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:33:25,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:25,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:33:25,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:33:25,630 INFO L87 Difference]: Start difference. First operand 2118 states and 6280 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:25,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:25,997 INFO L93 Difference]: Finished difference Result 2384 states and 6857 transitions. [2021-06-05 04:33:25,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:33:25,998 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:33:25,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:26,000 INFO L225 Difference]: With dead ends: 2384 [2021-06-05 04:33:26,000 INFO L226 Difference]: Without dead ends: 2384 [2021-06-05 04:33:26,000 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 250.2ms TimeCoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:33:26,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2384 states. [2021-06-05 04:33:26,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2384 to 2112. [2021-06-05 04:33:26,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2112 states, 2111 states have (on average 2.968261487446708) internal successors, (6266), 2111 states have internal predecessors, (6266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:26,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2112 states to 2112 states and 6266 transitions. [2021-06-05 04:33:26,021 INFO L78 Accepts]: Start accepts. Automaton has 2112 states and 6266 transitions. Word has length 19 [2021-06-05 04:33:26,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:26,022 INFO L482 AbstractCegarLoop]: Abstraction has 2112 states and 6266 transitions. [2021-06-05 04:33:26,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:26,022 INFO L276 IsEmpty]: Start isEmpty. Operand 2112 states and 6266 transitions. [2021-06-05 04:33:26,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:33:26,024 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:26,024 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:26,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3704,428 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:26,224 INFO L430 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:26,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:26,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1186240252, now seen corresponding path program 424 times [2021-06-05 04:33:26,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:26,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319720591] [2021-06-05 04:33:26,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:26,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:26,348 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:26,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:26,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319720591] [2021-06-05 04:33:26,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319720591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:26,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576664131] [2021-06-05 04:33:26,349 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:26,377 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:33:26,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:26,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:33:26,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:26,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:26,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:26,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:33:26,517 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:26,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:26,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:26,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:33:26,520 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:26,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:26,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:26,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:33:26,524 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:26,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:26,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:33:26,527 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:26,562 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:33:26,562 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:33:26,562 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:33:26,563 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:33:26,620 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:26,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576664131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:26,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:26,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 04:33:26,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695429715] [2021-06-05 04:33:26,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:33:26,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:26,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:33:26,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:33:26,621 INFO L87 Difference]: Start difference. First operand 2112 states and 6266 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:26,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:26,928 INFO L93 Difference]: Finished difference Result 2407 states and 6882 transitions. [2021-06-05 04:33:26,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:33:26,928 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:33:26,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:26,930 INFO L225 Difference]: With dead ends: 2407 [2021-06-05 04:33:26,931 INFO L226 Difference]: Without dead ends: 2407 [2021-06-05 04:33:26,931 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 315.3ms TimeCoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:33:26,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2407 states. [2021-06-05 04:33:26,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2407 to 2123. [2021-06-05 04:33:26,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2123 states, 2122 states have (on average 2.9717247879359094) internal successors, (6306), 2122 states have internal predecessors, (6306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:26,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2123 states to 2123 states and 6306 transitions. [2021-06-05 04:33:26,952 INFO L78 Accepts]: Start accepts. Automaton has 2123 states and 6306 transitions. Word has length 19 [2021-06-05 04:33:26,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:26,953 INFO L482 AbstractCegarLoop]: Abstraction has 2123 states and 6306 transitions. [2021-06-05 04:33:26,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:26,953 INFO L276 IsEmpty]: Start isEmpty. Operand 2123 states and 6306 transitions. [2021-06-05 04:33:26,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:33:26,955 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:26,955 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:27,155 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 429 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3707 [2021-06-05 04:33:27,155 INFO L430 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:27,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:27,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1987856480, now seen corresponding path program 425 times [2021-06-05 04:33:27,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:27,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783128508] [2021-06-05 04:33:27,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:27,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:27,287 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:27,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:27,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783128508] [2021-06-05 04:33:27,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783128508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:27,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401719847] [2021-06-05 04:33:27,288 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:27,318 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:33:27,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:27,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:33:27,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:27,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:27,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:27,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:33:27,477 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:27,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:27,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:27,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:33:27,482 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:27,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:27,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:27,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:33:27,487 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:27,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:27,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:33:27,491 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:27,538 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:33:27,538 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:33:27,539 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:33:27,539 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:33:27,644 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:27,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401719847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:27,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:27,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 04:33:27,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694745829] [2021-06-05 04:33:27,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:33:27,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:27,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:33:27,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:33:27,645 INFO L87 Difference]: Start difference. First operand 2123 states and 6306 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:28,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:28,826 INFO L93 Difference]: Finished difference Result 2434 states and 6929 transitions. [2021-06-05 04:33:28,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 04:33:28,827 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:33:28,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:28,829 INFO L225 Difference]: With dead ends: 2434 [2021-06-05 04:33:28,829 INFO L226 Difference]: Without dead ends: 2422 [2021-06-05 04:33:28,829 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 959.6ms TimeCoverageRelationStatistics Valid=188, Invalid=1704, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 04:33:28,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2422 states. [2021-06-05 04:33:28,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2422 to 2130. [2021-06-05 04:33:28,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2130 states, 2129 states have (on average 2.971817754814467) internal successors, (6327), 2129 states have internal predecessors, (6327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:28,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2130 states to 2130 states and 6327 transitions. [2021-06-05 04:33:28,850 INFO L78 Accepts]: Start accepts. Automaton has 2130 states and 6327 transitions. Word has length 19 [2021-06-05 04:33:28,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:28,850 INFO L482 AbstractCegarLoop]: Abstraction has 2130 states and 6327 transitions. [2021-06-05 04:33:28,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:28,850 INFO L276 IsEmpty]: Start isEmpty. Operand 2130 states and 6327 transitions. [2021-06-05 04:33:28,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:33:28,852 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:28,852 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:29,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3711,430 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:29,053 INFO L430 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:29,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:29,053 INFO L82 PathProgramCache]: Analyzing trace with hash -588767110, now seen corresponding path program 426 times [2021-06-05 04:33:29,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:29,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251371638] [2021-06-05 04:33:29,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:29,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:29,179 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:29,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:29,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251371638] [2021-06-05 04:33:29,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251371638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:29,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109547239] [2021-06-05 04:33:29,180 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:29,210 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:33:29,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:29,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:33:29,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:29,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:29,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:29,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:33:29,349 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:29,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:29,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:29,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:33:29,353 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:29,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:29,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:29,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:33:29,357 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:29,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:29,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:33:29,360 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:29,394 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:33:29,394 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:33:29,395 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:33:29,395 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:33:29,450 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:29,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109547239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:29,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:29,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 04:33:29,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129953694] [2021-06-05 04:33:29,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:33:29,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:29,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:33:29,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:33:29,451 INFO L87 Difference]: Start difference. First operand 2130 states and 6327 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:30,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:30,234 INFO L93 Difference]: Finished difference Result 2403 states and 6885 transitions. [2021-06-05 04:33:30,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 04:33:30,234 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:33:30,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:30,237 INFO L225 Difference]: With dead ends: 2403 [2021-06-05 04:33:30,237 INFO L226 Difference]: Without dead ends: 2403 [2021-06-05 04:33:30,237 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 598.5ms TimeCoverageRelationStatistics Valid=135, Invalid=987, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 04:33:30,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2403 states. [2021-06-05 04:33:30,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2403 to 2116. [2021-06-05 04:33:30,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2116 states, 2115 states have (on average 2.9673758865248225) internal successors, (6276), 2115 states have internal predecessors, (6276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:30,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2116 states to 2116 states and 6276 transitions. [2021-06-05 04:33:30,259 INFO L78 Accepts]: Start accepts. Automaton has 2116 states and 6276 transitions. Word has length 19 [2021-06-05 04:33:30,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:30,259 INFO L482 AbstractCegarLoop]: Abstraction has 2116 states and 6276 transitions. [2021-06-05 04:33:30,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:30,259 INFO L276 IsEmpty]: Start isEmpty. Operand 2116 states and 6276 transitions. [2021-06-05 04:33:30,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:33:30,261 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:30,261 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:30,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 431 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3716 [2021-06-05 04:33:30,461 INFO L430 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:30,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:30,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1995586878, now seen corresponding path program 427 times [2021-06-05 04:33:30,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:30,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942507603] [2021-06-05 04:33:30,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:30,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:30,582 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:30,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:30,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942507603] [2021-06-05 04:33:30,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942507603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:30,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093446439] [2021-06-05 04:33:30,583 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:30,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:30,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:33:30,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:30,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:30,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:30,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:33:30,780 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:30,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:30,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:33:30,783 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:30,806 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:33:30,807 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:33:30,807 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:33:30,807 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:33:30,831 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:30,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093446439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:30,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:30,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 04:33:30,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152743706] [2021-06-05 04:33:30,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:33:30,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:30,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:33:30,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:33:30,832 INFO L87 Difference]: Start difference. First operand 2116 states and 6276 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:31,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:31,683 INFO L93 Difference]: Finished difference Result 2466 states and 7001 transitions. [2021-06-05 04:33:31,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 04:33:31,683 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:33:31,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:31,686 INFO L225 Difference]: With dead ends: 2466 [2021-06-05 04:33:31,686 INFO L226 Difference]: Without dead ends: 2466 [2021-06-05 04:33:31,686 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 725.8ms TimeCoverageRelationStatistics Valid=193, Invalid=1529, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 04:33:31,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2466 states. [2021-06-05 04:33:31,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2466 to 2117. [2021-06-05 04:33:31,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2117 states, 2116 states have (on average 2.967391304347826) internal successors, (6279), 2116 states have internal predecessors, (6279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:31,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2117 states to 2117 states and 6279 transitions. [2021-06-05 04:33:31,708 INFO L78 Accepts]: Start accepts. Automaton has 2117 states and 6279 transitions. Word has length 19 [2021-06-05 04:33:31,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:31,708 INFO L482 AbstractCegarLoop]: Abstraction has 2117 states and 6279 transitions. [2021-06-05 04:33:31,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:31,708 INFO L276 IsEmpty]: Start isEmpty. Operand 2117 states and 6279 transitions. [2021-06-05 04:33:31,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:33:31,710 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:31,710 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:31,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3720,432 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:31,910 INFO L430 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:31,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:31,911 INFO L82 PathProgramCache]: Analyzing trace with hash 506181882, now seen corresponding path program 428 times [2021-06-05 04:33:31,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:31,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818189439] [2021-06-05 04:33:31,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:31,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:32,020 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:32,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:32,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818189439] [2021-06-05 04:33:32,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818189439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:32,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881442950] [2021-06-05 04:33:32,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:32,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:33:32,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:32,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:33:32,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:32,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:32,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:32,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:33:32,216 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:32,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:32,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:33:32,219 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:32,243 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:33:32,243 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:33:32,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:33:32,244 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:33:32,267 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:32,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881442950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:32,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:32,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 04:33:32,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192311026] [2021-06-05 04:33:32,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:33:32,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:32,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:33:32,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:33:32,268 INFO L87 Difference]: Start difference. First operand 2117 states and 6279 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:33,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:33,740 INFO L93 Difference]: Finished difference Result 2572 states and 7203 transitions. [2021-06-05 04:33:33,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 04:33:33,740 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:33:33,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:33,743 INFO L225 Difference]: With dead ends: 2572 [2021-06-05 04:33:33,743 INFO L226 Difference]: Without dead ends: 2572 [2021-06-05 04:33:33,743 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1089 ImplicationChecksByTransitivity, 1299.1ms TimeCoverageRelationStatistics Valid=411, Invalid=3371, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 04:33:33,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2572 states. [2021-06-05 04:33:33,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2572 to 2113. [2021-06-05 04:33:33,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2113 states, 2112 states have (on average 2.968276515151515) internal successors, (6269), 2112 states have internal predecessors, (6269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:33,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2113 states to 2113 states and 6269 transitions. [2021-06-05 04:33:33,765 INFO L78 Accepts]: Start accepts. Automaton has 2113 states and 6269 transitions. Word has length 19 [2021-06-05 04:33:33,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:33,765 INFO L482 AbstractCegarLoop]: Abstraction has 2113 states and 6269 transitions. [2021-06-05 04:33:33,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:33,766 INFO L276 IsEmpty]: Start isEmpty. Operand 2113 states and 6269 transitions. [2021-06-05 04:33:33,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:33:33,779 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:33,779 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:33,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3723,433 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:33,979 INFO L430 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:33,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:33,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1579267262, now seen corresponding path program 429 times [2021-06-05 04:33:33,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:33,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591229794] [2021-06-05 04:33:33,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:33,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:34,088 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:34,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:34,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591229794] [2021-06-05 04:33:34,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591229794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:34,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757237403] [2021-06-05 04:33:34,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:34,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:33:34,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:34,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:33:34,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:34,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:34,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:34,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:33:34,279 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:34,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:34,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:33:34,282 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:34,306 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:33:34,306 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:33:34,307 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:33:34,307 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:33:34,330 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:34,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757237403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:34,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:34,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 04:33:34,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901092463] [2021-06-05 04:33:34,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:33:34,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:34,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:33:34,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:33:34,331 INFO L87 Difference]: Start difference. First operand 2113 states and 6269 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:35,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:35,278 INFO L93 Difference]: Finished difference Result 2426 states and 6972 transitions. [2021-06-05 04:33:35,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 04:33:35,278 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:33:35,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:35,280 INFO L225 Difference]: With dead ends: 2426 [2021-06-05 04:33:35,280 INFO L226 Difference]: Without dead ends: 2426 [2021-06-05 04:33:35,280 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 725.1ms TimeCoverageRelationStatistics Valid=191, Invalid=1215, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 04:33:35,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2426 states. [2021-06-05 04:33:35,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2426 to 2115. [2021-06-05 04:33:35,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2115 states, 2114 states have (on average 2.968306527909177) internal successors, (6275), 2114 states have internal predecessors, (6275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:35,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2115 states to 2115 states and 6275 transitions. [2021-06-05 04:33:35,300 INFO L78 Accepts]: Start accepts. Automaton has 2115 states and 6275 transitions. Word has length 19 [2021-06-05 04:33:35,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:35,300 INFO L482 AbstractCegarLoop]: Abstraction has 2115 states and 6275 transitions. [2021-06-05 04:33:35,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:35,301 INFO L276 IsEmpty]: Start isEmpty. Operand 2115 states and 6275 transitions. [2021-06-05 04:33:35,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:33:35,302 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:35,302 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:35,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3726,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:35,503 INFO L430 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:35,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:35,503 INFO L82 PathProgramCache]: Analyzing trace with hash 485175674, now seen corresponding path program 430 times [2021-06-05 04:33:35,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:35,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166305142] [2021-06-05 04:33:35,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:35,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:35,613 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:35,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:35,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166305142] [2021-06-05 04:33:35,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166305142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:35,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476158375] [2021-06-05 04:33:35,613 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:35,642 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:33:35,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:35,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:33:35,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:35,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:35,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:35,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:33:35,805 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:35,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:35,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:33:35,808 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:35,832 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:33:35,832 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:33:35,833 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:33:35,833 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:33:35,857 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:35,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476158375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:35,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:35,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 04:33:35,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418258928] [2021-06-05 04:33:35,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:33:35,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:35,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:33:35,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:33:35,858 INFO L87 Difference]: Start difference. First operand 2115 states and 6275 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:36,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:36,131 INFO L93 Difference]: Finished difference Result 2351 states and 6795 transitions. [2021-06-05 04:33:36,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:33:36,132 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:33:36,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:36,134 INFO L225 Difference]: With dead ends: 2351 [2021-06-05 04:33:36,134 INFO L226 Difference]: Without dead ends: 2351 [2021-06-05 04:33:36,134 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 232.5ms TimeCoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:33:36,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2351 states. [2021-06-05 04:33:36,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2351 to 2117. [2021-06-05 04:33:36,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2117 states, 2116 states have (on average 2.9683364839319473) internal successors, (6281), 2116 states have internal predecessors, (6281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:36,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2117 states to 2117 states and 6281 transitions. [2021-06-05 04:33:36,157 INFO L78 Accepts]: Start accepts. Automaton has 2117 states and 6281 transitions. Word has length 19 [2021-06-05 04:33:36,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:36,157 INFO L482 AbstractCegarLoop]: Abstraction has 2117 states and 6281 transitions. [2021-06-05 04:33:36,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:36,157 INFO L276 IsEmpty]: Start isEmpty. Operand 2117 states and 6281 transitions. [2021-06-05 04:33:36,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:33:36,159 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:36,159 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:36,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 435 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3729 [2021-06-05 04:33:36,360 INFO L430 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:36,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:36,360 INFO L82 PathProgramCache]: Analyzing trace with hash 527359578, now seen corresponding path program 431 times [2021-06-05 04:33:36,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:36,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621928854] [2021-06-05 04:33:36,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:36,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:36,482 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:36,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:36,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621928854] [2021-06-05 04:33:36,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621928854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:36,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593724951] [2021-06-05 04:33:36,483 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:36,515 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:33:36,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:36,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:33:36,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:36,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:36,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:36,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:33:36,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:36,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:36,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:33:36,681 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:36,700 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-06-05 04:33:36,700 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:33:36,700 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:33:36,701 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-06-05 04:33:36,726 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:36,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593724951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:36,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:36,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 04:33:36,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087539167] [2021-06-05 04:33:36,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:33:36,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:36,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:33:36,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:33:36,727 INFO L87 Difference]: Start difference. First operand 2117 states and 6281 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:37,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:37,272 INFO L93 Difference]: Finished difference Result 2538 states and 7280 transitions. [2021-06-05 04:33:37,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 04:33:37,272 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:33:37,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:37,275 INFO L225 Difference]: With dead ends: 2538 [2021-06-05 04:33:37,275 INFO L226 Difference]: Without dead ends: 2538 [2021-06-05 04:33:37,275 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 373.9ms TimeCoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:33:37,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2538 states. [2021-06-05 04:33:37,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2538 to 2253. [2021-06-05 04:33:37,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2253 states, 2252 states have (on average 2.9871225577264653) internal successors, (6727), 2252 states have internal predecessors, (6727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:37,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2253 states to 2253 states and 6727 transitions. [2021-06-05 04:33:37,298 INFO L78 Accepts]: Start accepts. Automaton has 2253 states and 6727 transitions. Word has length 19 [2021-06-05 04:33:37,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:37,298 INFO L482 AbstractCegarLoop]: Abstraction has 2253 states and 6727 transitions. [2021-06-05 04:33:37,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:37,298 INFO L276 IsEmpty]: Start isEmpty. Operand 2253 states and 6727 transitions. [2021-06-05 04:33:37,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:33:37,300 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:37,300 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:37,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3732,436 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:37,501 INFO L430 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:37,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:37,501 INFO L82 PathProgramCache]: Analyzing trace with hash 2081408702, now seen corresponding path program 432 times [2021-06-05 04:33:37,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:37,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207453575] [2021-06-05 04:33:37,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:37,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:37,605 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:37,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:37,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207453575] [2021-06-05 04:33:37,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207453575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:37,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567816923] [2021-06-05 04:33:37,606 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:37,636 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:33:37,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:37,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:33:37,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:37,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:37,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:37,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:33:37,790 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:37,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:37,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:37,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:33:37,793 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:37,795 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:33:37,796 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:37,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:33:37,799 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:37,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:33:37,802 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:37,803 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:33:37,804 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:37,833 INFO L628 ElimStorePlain]: treesize reduction 21, result has 58.0 percent of original size [2021-06-05 04:33:37,833 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:33:37,834 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:33:37,834 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-06-05 04:33:37,869 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:37,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567816923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:37,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:37,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 04:33:37,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321435829] [2021-06-05 04:33:37,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:33:37,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:37,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:33:37,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:33:37,870 INFO L87 Difference]: Start difference. First operand 2253 states and 6727 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:38,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:38,524 INFO L93 Difference]: Finished difference Result 2409 states and 6994 transitions. [2021-06-05 04:33:38,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 04:33:38,525 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:33:38,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:38,527 INFO L225 Difference]: With dead ends: 2409 [2021-06-05 04:33:38,527 INFO L226 Difference]: Without dead ends: 2403 [2021-06-05 04:33:38,527 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 548.3ms TimeCoverageRelationStatistics Valid=145, Invalid=1415, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 04:33:38,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2403 states. [2021-06-05 04:33:38,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2403 to 2255. [2021-06-05 04:33:38,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2255 states, 2254 states have (on average 2.9835847382431235) internal successors, (6725), 2254 states have internal predecessors, (6725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:38,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2255 states to 2255 states and 6725 transitions. [2021-06-05 04:33:38,550 INFO L78 Accepts]: Start accepts. Automaton has 2255 states and 6725 transitions. Word has length 19 [2021-06-05 04:33:38,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:38,550 INFO L482 AbstractCegarLoop]: Abstraction has 2255 states and 6725 transitions. [2021-06-05 04:33:38,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:38,550 INFO L276 IsEmpty]: Start isEmpty. Operand 2255 states and 6725 transitions. [2021-06-05 04:33:38,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:33:38,552 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:38,552 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:38,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3734,437 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:38,753 INFO L430 AbstractCegarLoop]: === Iteration 447 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:38,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:38,753 INFO L82 PathProgramCache]: Analyzing trace with hash 767001916, now seen corresponding path program 433 times [2021-06-05 04:33:38,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:38,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700296673] [2021-06-05 04:33:38,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:38,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:38,861 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:38,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:38,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700296673] [2021-06-05 04:33:38,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700296673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:38,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10452489] [2021-06-05 04:33:38,861 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:38,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:38,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:33:38,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:39,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:39,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:39,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:33:39,048 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:39,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:39,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:33:39,051 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:39,069 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-06-05 04:33:39,069 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:33:39,070 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:33:39,070 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-06-05 04:33:39,095 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:39,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10452489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:39,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:39,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 04:33:39,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310871898] [2021-06-05 04:33:39,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:33:39,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:39,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:33:39,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:33:39,096 INFO L87 Difference]: Start difference. First operand 2255 states and 6725 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:40,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:40,189 INFO L93 Difference]: Finished difference Result 2634 states and 7517 transitions. [2021-06-05 04:33:40,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 04:33:40,189 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:33:40,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:40,192 INFO L225 Difference]: With dead ends: 2634 [2021-06-05 04:33:40,192 INFO L226 Difference]: Without dead ends: 2632 [2021-06-05 04:33:40,192 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 878.8ms TimeCoverageRelationStatistics Valid=253, Invalid=2399, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 04:33:40,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2632 states. [2021-06-05 04:33:40,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2632 to 2294. [2021-06-05 04:33:40,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2294 states, 2293 states have (on average 2.988661142607937) internal successors, (6853), 2293 states have internal predecessors, (6853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:40,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2294 states to 2294 states and 6853 transitions. [2021-06-05 04:33:40,216 INFO L78 Accepts]: Start accepts. Automaton has 2294 states and 6853 transitions. Word has length 19 [2021-06-05 04:33:40,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:40,216 INFO L482 AbstractCegarLoop]: Abstraction has 2294 states and 6853 transitions. [2021-06-05 04:33:40,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:40,216 INFO L276 IsEmpty]: Start isEmpty. Operand 2294 states and 6853 transitions. [2021-06-05 04:33:40,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:33:40,218 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:40,218 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:40,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 438 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3739 [2021-06-05 04:33:40,418 INFO L430 AbstractCegarLoop]: === Iteration 448 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:40,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:40,419 INFO L82 PathProgramCache]: Analyzing trace with hash -152698792, now seen corresponding path program 434 times [2021-06-05 04:33:40,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:40,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100864851] [2021-06-05 04:33:40,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:40,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:40,525 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:40,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:40,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100864851] [2021-06-05 04:33:40,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100864851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:40,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461845955] [2021-06-05 04:33:40,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:40,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:33:40,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:40,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:33:40,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:40,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:40,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:40,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:33:40,726 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:40,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:40,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:40,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:33:40,730 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:40,732 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:33:40,732 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:40,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:33:40,735 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:40,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:33:40,738 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:40,740 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:33:40,740 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:40,769 INFO L628 ElimStorePlain]: treesize reduction 21, result has 58.0 percent of original size [2021-06-05 04:33:40,770 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:33:40,770 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:33:40,770 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-06-05 04:33:40,805 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:40,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461845955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:40,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:40,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 04:33:40,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850668756] [2021-06-05 04:33:40,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:33:40,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:40,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:33:40,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:33:40,806 INFO L87 Difference]: Start difference. First operand 2294 states and 6853 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:41,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:41,708 INFO L93 Difference]: Finished difference Result 2456 states and 7146 transitions. [2021-06-05 04:33:41,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 04:33:41,708 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:33:41,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:41,711 INFO L225 Difference]: With dead ends: 2456 [2021-06-05 04:33:41,711 INFO L226 Difference]: Without dead ends: 2450 [2021-06-05 04:33:41,711 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 777.9ms TimeCoverageRelationStatistics Valid=195, Invalid=1785, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 04:33:41,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2450 states. [2021-06-05 04:33:41,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2450 to 2301. [2021-06-05 04:33:41,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2301 states, 2300 states have (on average 2.9808695652173913) internal successors, (6856), 2300 states have internal predecessors, (6856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:41,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2301 states to 2301 states and 6856 transitions. [2021-06-05 04:33:41,747 INFO L78 Accepts]: Start accepts. Automaton has 2301 states and 6856 transitions. Word has length 19 [2021-06-05 04:33:41,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:41,747 INFO L482 AbstractCegarLoop]: Abstraction has 2301 states and 6856 transitions. [2021-06-05 04:33:41,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:41,747 INFO L276 IsEmpty]: Start isEmpty. Operand 2301 states and 6856 transitions. [2021-06-05 04:33:41,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:33:41,750 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:41,750 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:41,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3741,439 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:41,965 INFO L430 AbstractCegarLoop]: === Iteration 449 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:41,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:41,965 INFO L82 PathProgramCache]: Analyzing trace with hash 774732314, now seen corresponding path program 435 times [2021-06-05 04:33:41,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:41,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50191225] [2021-06-05 04:33:41,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:41,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:42,073 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:42,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:42,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50191225] [2021-06-05 04:33:42,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50191225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:42,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817734250] [2021-06-05 04:33:42,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:42,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:33:42,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:42,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:33:42,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:42,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:42,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:42,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:33:42,237 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:42,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:42,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:42,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:33:42,241 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:42,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:42,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:42,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:33:42,244 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:42,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:42,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:33:42,247 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:42,282 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:33:42,282 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:33:42,282 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:33:42,283 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:33:42,340 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:42,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817734250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:42,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:42,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 04:33:42,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398267377] [2021-06-05 04:33:42,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:33:42,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:42,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:33:42,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:33:42,341 INFO L87 Difference]: Start difference. First operand 2301 states and 6856 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:43,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:43,389 INFO L93 Difference]: Finished difference Result 2657 states and 7535 transitions. [2021-06-05 04:33:43,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 04:33:43,389 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:33:43,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:43,392 INFO L225 Difference]: With dead ends: 2657 [2021-06-05 04:33:43,392 INFO L226 Difference]: Without dead ends: 2655 [2021-06-05 04:33:43,392 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 848.4ms TimeCoverageRelationStatistics Valid=238, Invalid=2018, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 04:33:43,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2655 states. [2021-06-05 04:33:43,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2655 to 2288. [2021-06-05 04:33:43,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2288 states, 2287 states have (on average 2.979011805859204) internal successors, (6813), 2287 states have internal predecessors, (6813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:43,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2288 states to 2288 states and 6813 transitions. [2021-06-05 04:33:43,415 INFO L78 Accepts]: Start accepts. Automaton has 2288 states and 6813 transitions. Word has length 19 [2021-06-05 04:33:43,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:43,416 INFO L482 AbstractCegarLoop]: Abstraction has 2288 states and 6813 transitions. [2021-06-05 04:33:43,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:43,416 INFO L276 IsEmpty]: Start isEmpty. Operand 2288 states and 6813 transitions. [2021-06-05 04:33:43,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:33:43,418 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:43,418 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:43,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3746,440 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:43,618 INFO L430 AbstractCegarLoop]: === Iteration 450 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:43,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:43,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1576348542, now seen corresponding path program 436 times [2021-06-05 04:33:43,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:43,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565739796] [2021-06-05 04:33:43,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:43,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:43,730 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:43,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:43,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565739796] [2021-06-05 04:33:43,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565739796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:43,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881660672] [2021-06-05 04:33:43,730 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:43,759 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:33:43,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:43,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:33:43,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:43,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:43,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:43,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:33:43,893 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:43,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:43,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:43,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:33:43,896 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:43,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:43,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:43,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:33:43,900 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:43,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:43,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:33:43,903 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:43,937 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:33:43,938 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:33:43,938 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:33:43,938 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:33:44,016 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:44,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881660672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:44,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:44,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 04:33:44,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722792896] [2021-06-05 04:33:44,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:33:44,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:44,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:33:44,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:33:44,017 INFO L87 Difference]: Start difference. First operand 2288 states and 6813 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:45,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:45,231 INFO L93 Difference]: Finished difference Result 2603 states and 7447 transitions. [2021-06-05 04:33:45,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 04:33:45,232 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:33:45,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:45,234 INFO L225 Difference]: With dead ends: 2603 [2021-06-05 04:33:45,234 INFO L226 Difference]: Without dead ends: 2598 [2021-06-05 04:33:45,234 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 1036.2ms TimeCoverageRelationStatistics Valid=287, Invalid=2575, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 04:33:45,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2598 states. [2021-06-05 04:33:45,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2598 to 2308. [2021-06-05 04:33:45,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2308 states, 2307 states have (on average 2.979627221499783) internal successors, (6874), 2307 states have internal predecessors, (6874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:45,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2308 states to 2308 states and 6874 transitions. [2021-06-05 04:33:45,257 INFO L78 Accepts]: Start accepts. Automaton has 2308 states and 6874 transitions. Word has length 19 [2021-06-05 04:33:45,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:45,257 INFO L482 AbstractCegarLoop]: Abstraction has 2308 states and 6874 transitions. [2021-06-05 04:33:45,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:45,257 INFO L276 IsEmpty]: Start isEmpty. Operand 2308 states and 6874 transitions. [2021-06-05 04:33:45,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:33:45,260 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:45,260 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:45,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3750,441 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:45,460 INFO L430 AbstractCegarLoop]: === Iteration 451 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:45,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:45,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1000275048, now seen corresponding path program 437 times [2021-06-05 04:33:45,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:45,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240156097] [2021-06-05 04:33:45,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:45,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:45,573 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:45,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:45,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240156097] [2021-06-05 04:33:45,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240156097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:45,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549104119] [2021-06-05 04:33:45,574 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:45,604 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:33:45,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:45,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:33:45,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:45,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:45,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:45,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:33:45,737 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:45,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:45,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:45,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:33:45,740 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:45,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:45,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:45,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:33:45,744 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:45,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:45,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:33:45,747 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:45,793 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:33:45,793 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:33:45,794 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:33:45,794 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:33:45,849 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:45,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549104119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:45,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:45,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 04:33:45,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096679946] [2021-06-05 04:33:45,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:33:45,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:45,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:33:45,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:33:45,850 INFO L87 Difference]: Start difference. First operand 2308 states and 6874 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:46,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:46,859 INFO L93 Difference]: Finished difference Result 2589 states and 7396 transitions. [2021-06-05 04:33:46,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 04:33:46,859 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:33:46,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:46,862 INFO L225 Difference]: With dead ends: 2589 [2021-06-05 04:33:46,862 INFO L226 Difference]: Without dead ends: 2589 [2021-06-05 04:33:46,862 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 835.6ms TimeCoverageRelationStatistics Valid=244, Invalid=1826, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 04:33:46,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2589 states. [2021-06-05 04:33:46,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2589 to 2217. [2021-06-05 04:33:46,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2217 states, 2216 states have (on average 2.9657039711191335) internal successors, (6572), 2216 states have internal predecessors, (6572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:46,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2217 states to 2217 states and 6572 transitions. [2021-06-05 04:33:46,884 INFO L78 Accepts]: Start accepts. Automaton has 2217 states and 6572 transitions. Word has length 19 [2021-06-05 04:33:46,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:46,884 INFO L482 AbstractCegarLoop]: Abstraction has 2217 states and 6572 transitions. [2021-06-05 04:33:46,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:46,884 INFO L276 IsEmpty]: Start isEmpty. Operand 2217 states and 6572 transitions. [2021-06-05 04:33:46,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:33:46,886 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:46,886 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:47,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3755,442 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:47,087 INFO L430 AbstractCegarLoop]: === Iteration 452 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:47,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:47,087 INFO L82 PathProgramCache]: Analyzing trace with hash -839628416, now seen corresponding path program 438 times [2021-06-05 04:33:47,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:47,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509876602] [2021-06-05 04:33:47,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:47,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:47,191 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:33:47,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:47,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509876602] [2021-06-05 04:33:47,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509876602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:47,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147477017] [2021-06-05 04:33:47,191 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:47,222 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:33:47,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:47,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:33:47,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:47,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:47,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:47,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:33:47,340 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:47,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:47,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:47,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:33:47,344 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:47,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:47,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:47,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:33:47,347 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:47,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:47,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:33:47,350 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:47,385 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:33:47,385 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:33:47,386 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:33:47,386 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:33:47,456 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:47,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147477017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:47,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:47,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-05 04:33:47,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581325718] [2021-06-05 04:33:47,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:33:47,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:47,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:33:47,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:33:47,456 INFO L87 Difference]: Start difference. First operand 2217 states and 6572 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:48,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:48,475 INFO L93 Difference]: Finished difference Result 2408 states and 6911 transitions. [2021-06-05 04:33:48,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 04:33:48,476 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:33:48,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:48,478 INFO L225 Difference]: With dead ends: 2408 [2021-06-05 04:33:48,478 INFO L226 Difference]: Without dead ends: 2404 [2021-06-05 04:33:48,478 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 870.7ms TimeCoverageRelationStatistics Valid=250, Invalid=2402, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 04:33:48,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2404 states. [2021-06-05 04:33:48,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2404 to 2218. [2021-06-05 04:33:48,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2218 states, 2217 states have (on average 2.962110960757781) internal successors, (6567), 2217 states have internal predecessors, (6567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:48,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2218 states to 2218 states and 6567 transitions. [2021-06-05 04:33:48,499 INFO L78 Accepts]: Start accepts. Automaton has 2218 states and 6567 transitions. Word has length 19 [2021-06-05 04:33:48,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:48,499 INFO L482 AbstractCegarLoop]: Abstraction has 2218 states and 6567 transitions. [2021-06-05 04:33:48,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:48,499 INFO L276 IsEmpty]: Start isEmpty. Operand 2218 states and 6567 transitions. [2021-06-05 04:33:48,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:33:48,501 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:48,501 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:48,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 443 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3759 [2021-06-05 04:33:48,702 INFO L430 AbstractCegarLoop]: === Iteration 453 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:48,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:48,702 INFO L82 PathProgramCache]: Analyzing trace with hash 358412698, now seen corresponding path program 439 times [2021-06-05 04:33:48,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:48,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049681335] [2021-06-05 04:33:48,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:48,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:48,826 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:48,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:48,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049681335] [2021-06-05 04:33:48,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049681335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:48,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445273585] [2021-06-05 04:33:48,827 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:48,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:48,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:33:48,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:49,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:49,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:49,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:33:49,019 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:49,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:49,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:49,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:33:49,023 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:49,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:49,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:49,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:33:49,027 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:49,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:49,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:33:49,031 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:49,071 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:33:49,072 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:33:49,072 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:33:49,073 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:33:49,138 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:49,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445273585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:49,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:49,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-05 04:33:49,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489930993] [2021-06-05 04:33:49,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:33:49,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:49,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:33:49,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:33:49,139 INFO L87 Difference]: Start difference. First operand 2218 states and 6567 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:50,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:50,041 INFO L93 Difference]: Finished difference Result 2492 states and 7096 transitions. [2021-06-05 04:33:50,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 04:33:50,041 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:33:50,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:50,044 INFO L225 Difference]: With dead ends: 2492 [2021-06-05 04:33:50,044 INFO L226 Difference]: Without dead ends: 2488 [2021-06-05 04:33:50,044 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 709.7ms TimeCoverageRelationStatistics Valid=160, Invalid=1246, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 04:33:50,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2488 states. [2021-06-05 04:33:50,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2488 to 2223. [2021-06-05 04:33:50,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2223 states, 2222 states have (on average 2.963996399639964) internal successors, (6586), 2222 states have internal predecessors, (6586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:50,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2223 states to 2223 states and 6586 transitions. [2021-06-05 04:33:50,075 INFO L78 Accepts]: Start accepts. Automaton has 2223 states and 6586 transitions. Word has length 19 [2021-06-05 04:33:50,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:50,075 INFO L482 AbstractCegarLoop]: Abstraction has 2223 states and 6586 transitions. [2021-06-05 04:33:50,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:50,076 INFO L276 IsEmpty]: Start isEmpty. Operand 2223 states and 6586 transitions. [2021-06-05 04:33:50,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:33:50,078 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:50,078 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:50,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3765,444 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:50,299 INFO L430 AbstractCegarLoop]: === Iteration 454 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:50,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:50,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1160028926, now seen corresponding path program 440 times [2021-06-05 04:33:50,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:50,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195038967] [2021-06-05 04:33:50,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:50,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:50,428 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:50,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:50,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195038967] [2021-06-05 04:33:50,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195038967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:50,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875773618] [2021-06-05 04:33:50,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:50,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:33:50,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:50,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:33:50,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:50,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:50,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:50,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:33:50,624 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:50,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:50,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:50,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:33:50,628 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:50,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:50,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:50,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:33:50,632 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:50,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:50,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:33:50,636 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:50,676 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:33:50,677 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:33:50,677 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:33:50,677 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:33:50,768 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:50,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875773618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:50,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:50,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-05 04:33:50,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213900863] [2021-06-05 04:33:50,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:33:50,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:50,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:33:50,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:33:50,768 INFO L87 Difference]: Start difference. First operand 2223 states and 6586 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:51,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:51,913 INFO L93 Difference]: Finished difference Result 2547 states and 7260 transitions. [2021-06-05 04:33:51,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 04:33:51,913 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:33:51,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:51,916 INFO L225 Difference]: With dead ends: 2547 [2021-06-05 04:33:51,916 INFO L226 Difference]: Without dead ends: 2541 [2021-06-05 04:33:51,916 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 924.1ms TimeCoverageRelationStatistics Valid=232, Invalid=2024, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 04:33:51,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2541 states. [2021-06-05 04:33:51,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2541 to 2244. [2021-06-05 04:33:51,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2244 states, 2243 states have (on average 2.965670976370932) internal successors, (6652), 2243 states have internal predecessors, (6652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:51,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2244 states to 2244 states and 6652 transitions. [2021-06-05 04:33:51,940 INFO L78 Accepts]: Start accepts. Automaton has 2244 states and 6652 transitions. Word has length 19 [2021-06-05 04:33:51,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:51,940 INFO L482 AbstractCegarLoop]: Abstraction has 2244 states and 6652 transitions. [2021-06-05 04:33:51,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:51,940 INFO L276 IsEmpty]: Start isEmpty. Operand 2244 states and 6652 transitions. [2021-06-05 04:33:51,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:33:51,942 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:51,942 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:52,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 445 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3769 [2021-06-05 04:33:52,142 INFO L430 AbstractCegarLoop]: === Iteration 455 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:52,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:52,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1416594664, now seen corresponding path program 441 times [2021-06-05 04:33:52,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:52,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149659046] [2021-06-05 04:33:52,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:52,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:52,264 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:52,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:52,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149659046] [2021-06-05 04:33:52,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149659046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:52,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230139294] [2021-06-05 04:33:52,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:52,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:33:52,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:52,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:33:52,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:52,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:52,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:52,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:33:52,457 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:52,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:52,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:52,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:33:52,461 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:52,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:52,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:52,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:33:52,465 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:52,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:52,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:33:52,468 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:52,509 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:33:52,509 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:33:52,510 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:33:52,510 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:33:52,572 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:52,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230139294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:52,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:52,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-05 04:33:52,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352143416] [2021-06-05 04:33:52,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:33:52,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:52,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:33:52,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:33:52,573 INFO L87 Difference]: Start difference. First operand 2244 states and 6652 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:53,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:53,311 INFO L93 Difference]: Finished difference Result 2539 states and 7222 transitions. [2021-06-05 04:33:53,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 04:33:53,311 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:33:53,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:53,314 INFO L225 Difference]: With dead ends: 2539 [2021-06-05 04:33:53,314 INFO L226 Difference]: Without dead ends: 2537 [2021-06-05 04:33:53,314 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 532.8ms TimeCoverageRelationStatistics Valid=138, Invalid=1052, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:33:53,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2537 states. [2021-06-05 04:33:53,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2537 to 2220. [2021-06-05 04:33:53,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2220 states, 2219 states have (on average 2.953582694907616) internal successors, (6554), 2219 states have internal predecessors, (6554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:53,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2220 states to 2220 states and 6554 transitions. [2021-06-05 04:33:53,336 INFO L78 Accepts]: Start accepts. Automaton has 2220 states and 6554 transitions. Word has length 19 [2021-06-05 04:33:53,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:53,336 INFO L482 AbstractCegarLoop]: Abstraction has 2220 states and 6554 transitions. [2021-06-05 04:33:53,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:53,336 INFO L276 IsEmpty]: Start isEmpty. Operand 2220 states and 6554 transitions. [2021-06-05 04:33:53,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:33:53,338 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:53,338 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:53,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3774,446 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:53,539 INFO L430 AbstractCegarLoop]: === Iteration 456 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:53,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:53,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1167759324, now seen corresponding path program 442 times [2021-06-05 04:33:53,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:53,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25728745] [2021-06-05 04:33:53,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:53,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:53,654 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:53,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:53,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25728745] [2021-06-05 04:33:53,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25728745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:53,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126571297] [2021-06-05 04:33:53,655 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:53,692 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:33:53,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:53,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:33:53,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:53,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:53,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:53,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:33:53,889 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:53,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:53,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:33:53,892 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:53,920 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:33:53,920 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:33:53,921 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:33:53,921 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:33:53,947 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:53,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126571297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:53,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:53,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-05 04:33:53,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142949419] [2021-06-05 04:33:53,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:33:53,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:53,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:33:53,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:33:53,949 INFO L87 Difference]: Start difference. First operand 2220 states and 6554 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:54,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:54,585 INFO L93 Difference]: Finished difference Result 2563 states and 7274 transitions. [2021-06-05 04:33:54,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 04:33:54,586 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:33:54,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:54,589 INFO L225 Difference]: With dead ends: 2563 [2021-06-05 04:33:54,589 INFO L226 Difference]: Without dead ends: 2563 [2021-06-05 04:33:54,590 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 499.5ms TimeCoverageRelationStatistics Valid=127, Invalid=1063, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:33:54,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2563 states. [2021-06-05 04:33:54,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2563 to 2223. [2021-06-05 04:33:54,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2223 states, 2222 states have (on average 2.9531953195319534) internal successors, (6562), 2222 states have internal predecessors, (6562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:54,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2223 states to 2223 states and 6562 transitions. [2021-06-05 04:33:54,621 INFO L78 Accepts]: Start accepts. Automaton has 2223 states and 6562 transitions. Word has length 19 [2021-06-05 04:33:54,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:54,621 INFO L482 AbstractCegarLoop]: Abstraction has 2223 states and 6562 transitions. [2021-06-05 04:33:54,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:54,621 INFO L276 IsEmpty]: Start isEmpty. Operand 2223 states and 6562 transitions. [2021-06-05 04:33:54,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:33:54,624 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:54,624 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:54,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 447 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3778 [2021-06-05 04:33:54,845 INFO L430 AbstractCegarLoop]: === Iteration 457 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:54,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:54,846 INFO L82 PathProgramCache]: Analyzing trace with hash 337406490, now seen corresponding path program 443 times [2021-06-05 04:33:54,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:54,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654031897] [2021-06-05 04:33:54,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:54,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:54,972 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:54,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:54,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654031897] [2021-06-05 04:33:54,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654031897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:54,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261079532] [2021-06-05 04:33:54,972 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:55,010 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:33:55,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:55,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:33:55,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:55,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:55,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:55,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:33:55,179 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:55,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:55,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:55,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:33:55,183 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:55,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:55,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:55,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:33:55,188 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:55,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:55,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:33:55,191 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:55,232 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:33:55,232 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:33:55,233 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:33:55,233 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:33:55,297 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:55,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261079532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:55,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:55,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-05 04:33:55,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182560996] [2021-06-05 04:33:55,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:33:55,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:55,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:33:55,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:33:55,298 INFO L87 Difference]: Start difference. First operand 2223 states and 6562 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:55,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:55,976 INFO L93 Difference]: Finished difference Result 2401 states and 6892 transitions. [2021-06-05 04:33:55,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:33:55,976 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:33:55,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:55,979 INFO L225 Difference]: With dead ends: 2401 [2021-06-05 04:33:55,979 INFO L226 Difference]: Without dead ends: 2399 [2021-06-05 04:33:55,979 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 615.1ms TimeCoverageRelationStatistics Valid=129, Invalid=993, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 04:33:55,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2399 states. [2021-06-05 04:33:56,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2399 to 2211. [2021-06-05 04:33:56,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2211 states, 2210 states have (on average 2.951131221719457) internal successors, (6522), 2210 states have internal predecessors, (6522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:56,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2211 states to 2211 states and 6522 transitions. [2021-06-05 04:33:56,028 INFO L78 Accepts]: Start accepts. Automaton has 2211 states and 6522 transitions. Word has length 19 [2021-06-05 04:33:56,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:56,028 INFO L482 AbstractCegarLoop]: Abstraction has 2211 states and 6522 transitions. [2021-06-05 04:33:56,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:56,028 INFO L276 IsEmpty]: Start isEmpty. Operand 2211 states and 6522 transitions. [2021-06-05 04:33:56,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:33:56,031 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:56,031 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:56,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 448 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3781 [2021-06-05 04:33:56,252 INFO L430 AbstractCegarLoop]: === Iteration 458 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:56,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:56,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1944927676, now seen corresponding path program 444 times [2021-06-05 04:33:56,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:56,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885079068] [2021-06-05 04:33:56,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:56,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:56,378 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:56,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:56,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885079068] [2021-06-05 04:33:56,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885079068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:56,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688994204] [2021-06-05 04:33:56,378 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:56,416 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:33:56,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:56,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:33:56,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:56,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:56,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:56,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:33:56,585 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:56,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:56,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:56,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:33:56,589 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:56,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:56,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:56,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:33:56,593 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:56,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:56,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:33:56,597 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:56,637 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:33:56,638 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:33:56,638 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:33:56,638 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:33:56,718 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:56,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688994204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:56,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:56,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-05 04:33:56,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091229608] [2021-06-05 04:33:56,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:33:56,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:56,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:33:56,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:33:56,719 INFO L87 Difference]: Start difference. First operand 2211 states and 6522 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:57,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:57,785 INFO L93 Difference]: Finished difference Result 2380 states and 6825 transitions. [2021-06-05 04:33:57,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 04:33:57,785 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:33:57,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:57,788 INFO L225 Difference]: With dead ends: 2380 [2021-06-05 04:33:57,788 INFO L226 Difference]: Without dead ends: 2376 [2021-06-05 04:33:57,788 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 845.4ms TimeCoverageRelationStatistics Valid=192, Invalid=1700, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 04:33:57,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2376 states. [2021-06-05 04:33:57,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2376 to 2207. [2021-06-05 04:33:57,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2207 states, 2206 states have (on average 2.9505893019038987) internal successors, (6509), 2206 states have internal predecessors, (6509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:57,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2207 states to 2207 states and 6509 transitions. [2021-06-05 04:33:57,817 INFO L78 Accepts]: Start accepts. Automaton has 2207 states and 6509 transitions. Word has length 19 [2021-06-05 04:33:57,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:57,817 INFO L482 AbstractCegarLoop]: Abstraction has 2207 states and 6509 transitions. [2021-06-05 04:33:57,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:57,817 INFO L276 IsEmpty]: Start isEmpty. Operand 2207 states and 6509 transitions. [2021-06-05 04:33:57,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:33:57,820 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:57,820 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:58,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3785,449 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:58,041 INFO L430 AbstractCegarLoop]: === Iteration 459 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:58,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:58,041 INFO L82 PathProgramCache]: Analyzing trace with hash -620992286, now seen corresponding path program 445 times [2021-06-05 04:33:58,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:58,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812054120] [2021-06-05 04:33:58,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:58,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:58,155 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:58,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:58,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812054120] [2021-06-05 04:33:58,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812054120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:58,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107804558] [2021-06-05 04:33:58,156 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:58,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:58,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:33:58,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:58,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:33:58,377 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:58,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:33:58,382 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:58,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:58,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:58,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:33:58,386 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:58,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:33:58,390 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:58,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:33:58,394 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:58,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:58,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:33:58,398 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:58,436 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-05 04:33:58,436 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:33:58,438 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:33:58,438 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-05 04:33:58,476 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:58,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107804558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:58,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:58,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-05 04:33:58,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536210998] [2021-06-05 04:33:58,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:33:58,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:58,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:33:58,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:33:58,477 INFO L87 Difference]: Start difference. First operand 2207 states and 6509 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:59,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:33:59,258 INFO L93 Difference]: Finished difference Result 2338 states and 6745 transitions. [2021-06-05 04:33:59,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 04:33:59,258 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:33:59,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:33:59,261 INFO L225 Difference]: With dead ends: 2338 [2021-06-05 04:33:59,261 INFO L226 Difference]: Without dead ends: 2330 [2021-06-05 04:33:59,261 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 654.4ms TimeCoverageRelationStatistics Valid=157, Invalid=1325, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 04:33:59,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2330 states. [2021-06-05 04:33:59,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2330 to 2205. [2021-06-05 04:33:59,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2205 states, 2204 states have (on average 2.9478221415607986) internal successors, (6497), 2204 states have internal predecessors, (6497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:59,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2205 states to 2205 states and 6497 transitions. [2021-06-05 04:33:59,287 INFO L78 Accepts]: Start accepts. Automaton has 2205 states and 6497 transitions. Word has length 19 [2021-06-05 04:33:59,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:33:59,287 INFO L482 AbstractCegarLoop]: Abstraction has 2205 states and 6497 transitions. [2021-06-05 04:33:59,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:33:59,287 INFO L276 IsEmpty]: Start isEmpty. Operand 2205 states and 6497 transitions. [2021-06-05 04:33:59,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:33:59,289 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:33:59,289 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:33:59,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3791,450 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:59,490 INFO L430 AbstractCegarLoop]: === Iteration 460 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:33:59,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:33:59,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1146753116, now seen corresponding path program 446 times [2021-06-05 04:33:59,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:33:59,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858594196] [2021-06-05 04:33:59,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:33:59,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:33:59,596 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:59,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:33:59,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858594196] [2021-06-05 04:33:59,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858594196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:59,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735069312] [2021-06-05 04:33:59,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:33:59,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:33:59,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:33:59,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:33:59,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:33:59,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:59,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:59,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:33:59,783 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:59,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:33:59,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:33:59,786 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:33:59,810 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:33:59,810 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:33:59,810 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:33:59,811 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:33:59,832 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:33:59,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735069312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:33:59,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:33:59,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-05 04:33:59,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429395657] [2021-06-05 04:33:59,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:33:59,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:33:59,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:33:59,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:33:59,833 INFO L87 Difference]: Start difference. First operand 2205 states and 6497 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:00,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:00,524 INFO L93 Difference]: Finished difference Result 2482 states and 7063 transitions. [2021-06-05 04:34:00,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 04:34:00,525 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:34:00,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:00,527 INFO L225 Difference]: With dead ends: 2482 [2021-06-05 04:34:00,527 INFO L226 Difference]: Without dead ends: 2478 [2021-06-05 04:34:00,527 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 612.6ms TimeCoverageRelationStatistics Valid=182, Invalid=1378, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 04:34:00,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2478 states. [2021-06-05 04:34:00,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2478 to 2199. [2021-06-05 04:34:00,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2199 states, 2198 states have (on average 2.9426751592356686) internal successors, (6468), 2198 states have internal predecessors, (6468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:00,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2199 states to 2199 states and 6468 transitions. [2021-06-05 04:34:00,550 INFO L78 Accepts]: Start accepts. Automaton has 2199 states and 6468 transitions. Word has length 19 [2021-06-05 04:34:00,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:00,550 INFO L482 AbstractCegarLoop]: Abstraction has 2199 states and 6468 transitions. [2021-06-05 04:34:00,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:00,550 INFO L276 IsEmpty]: Start isEmpty. Operand 2199 states and 6468 transitions. [2021-06-05 04:34:00,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:34:00,552 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:00,552 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:00,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3798,451 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:00,752 INFO L430 AbstractCegarLoop]: === Iteration 461 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:00,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:00,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1439867516, now seen corresponding path program 447 times [2021-06-05 04:34:00,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:00,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238172990] [2021-06-05 04:34:00,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:00,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:00,857 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:00,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:00,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238172990] [2021-06-05 04:34:00,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238172990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:00,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530563122] [2021-06-05 04:34:00,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:00,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:34:00,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:00,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:34:00,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:01,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:34:01,069 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:01,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:34:01,072 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:01,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:01,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:01,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:34:01,076 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:01,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:34:01,079 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:01,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:34:01,082 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:01,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:01,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:34:01,085 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:01,117 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-05 04:34:01,118 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:34:01,118 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:34:01,119 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-05 04:34:01,148 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:01,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530563122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:01,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:01,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-05 04:34:01,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792349411] [2021-06-05 04:34:01,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:34:01,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:01,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:34:01,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:34:01,149 INFO L87 Difference]: Start difference. First operand 2199 states and 6468 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:01,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:01,860 INFO L93 Difference]: Finished difference Result 2299 states and 6645 transitions. [2021-06-05 04:34:01,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 04:34:01,860 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:34:01,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:01,863 INFO L225 Difference]: With dead ends: 2299 [2021-06-05 04:34:01,863 INFO L226 Difference]: Without dead ends: 2287 [2021-06-05 04:34:01,863 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 579.4ms TimeCoverageRelationStatistics Valid=139, Invalid=1193, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 04:34:01,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2287 states. [2021-06-05 04:34:01,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2287 to 2199. [2021-06-05 04:34:01,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2199 states, 2198 states have (on average 2.9381255686988172) internal successors, (6458), 2198 states have internal predecessors, (6458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:01,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2199 states to 2199 states and 6458 transitions. [2021-06-05 04:34:01,884 INFO L78 Accepts]: Start accepts. Automaton has 2199 states and 6458 transitions. Word has length 19 [2021-06-05 04:34:01,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:01,884 INFO L482 AbstractCegarLoop]: Abstraction has 2199 states and 6458 transitions. [2021-06-05 04:34:01,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:01,884 INFO L276 IsEmpty]: Start isEmpty. Operand 2199 states and 6458 transitions. [2021-06-05 04:34:01,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:34:01,886 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:01,886 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:02,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 452 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3801 [2021-06-05 04:34:02,086 INFO L430 AbstractCegarLoop]: === Iteration 462 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:02,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:02,087 INFO L82 PathProgramCache]: Analyzing trace with hash -342651880, now seen corresponding path program 448 times [2021-06-05 04:34:02,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:02,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558204682] [2021-06-05 04:34:02,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:02,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:02,176 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:02,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:02,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558204682] [2021-06-05 04:34:02,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558204682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:02,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892176103] [2021-06-05 04:34:02,176 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:02,206 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:34:02,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:02,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:34:02,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:02,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:02,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:02,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:34:02,374 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:02,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:02,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:34:02,377 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:02,401 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:34:02,401 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:34:02,401 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:34:02,402 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:34:02,424 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:02,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892176103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:02,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:02,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-05 04:34:02,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334822417] [2021-06-05 04:34:02,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:34:02,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:02,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:34:02,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:34:02,425 INFO L87 Difference]: Start difference. First operand 2199 states and 6458 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:02,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:02,771 INFO L93 Difference]: Finished difference Result 2465 states and 7055 transitions. [2021-06-05 04:34:02,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:34:02,772 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:34:02,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:02,774 INFO L225 Difference]: With dead ends: 2465 [2021-06-05 04:34:02,774 INFO L226 Difference]: Without dead ends: 2465 [2021-06-05 04:34:02,774 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 269.4ms TimeCoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:34:02,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2465 states. [2021-06-05 04:34:02,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2465 to 2205. [2021-06-05 04:34:02,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2205 states, 2204 states have (on average 2.939201451905626) internal successors, (6478), 2204 states have internal predecessors, (6478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:02,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2205 states to 2205 states and 6478 transitions. [2021-06-05 04:34:02,796 INFO L78 Accepts]: Start accepts. Automaton has 2205 states and 6478 transitions. Word has length 19 [2021-06-05 04:34:02,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:02,796 INFO L482 AbstractCegarLoop]: Abstraction has 2205 states and 6478 transitions. [2021-06-05 04:34:02,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:02,796 INFO L276 IsEmpty]: Start isEmpty. Operand 2205 states and 6478 transitions. [2021-06-05 04:34:02,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:34:02,798 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:02,798 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:02,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 453 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3808 [2021-06-05 04:34:02,999 INFO L430 AbstractCegarLoop]: === Iteration 463 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:02,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:02,999 INFO L82 PathProgramCache]: Analyzing trace with hash -313785958, now seen corresponding path program 449 times [2021-06-05 04:34:02,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:02,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682677958] [2021-06-05 04:34:02,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:03,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:03,106 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:03,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:03,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682677958] [2021-06-05 04:34:03,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682677958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:03,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880838281] [2021-06-05 04:34:03,106 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:03,137 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:34:03,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:03,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:34:03,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:03,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:03,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:03,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:34:03,274 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:03,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:03,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:03,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:34:03,278 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:03,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:03,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:03,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:34:03,281 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:03,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:03,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:34:03,284 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:03,319 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:34:03,319 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:34:03,320 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:34:03,320 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:34:03,378 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:03,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880838281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:03,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:03,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-05 04:34:03,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784574146] [2021-06-05 04:34:03,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:34:03,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:03,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:34:03,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:34:03,379 INFO L87 Difference]: Start difference. First operand 2205 states and 6478 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:03,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:03,833 INFO L93 Difference]: Finished difference Result 2452 states and 7010 transitions. [2021-06-05 04:34:03,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:34:03,834 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:34:03,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:03,836 INFO L225 Difference]: With dead ends: 2452 [2021-06-05 04:34:03,836 INFO L226 Difference]: Without dead ends: 2451 [2021-06-05 04:34:03,836 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 398.1ms TimeCoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:34:03,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2451 states. [2021-06-05 04:34:03,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2451 to 2222. [2021-06-05 04:34:03,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2222 states, 2221 states have (on average 2.9477712742008104) internal successors, (6547), 2221 states have internal predecessors, (6547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:03,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2222 states to 2222 states and 6547 transitions. [2021-06-05 04:34:03,867 INFO L78 Accepts]: Start accepts. Automaton has 2222 states and 6547 transitions. Word has length 19 [2021-06-05 04:34:03,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:03,867 INFO L482 AbstractCegarLoop]: Abstraction has 2222 states and 6547 transitions. [2021-06-05 04:34:03,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:03,867 INFO L276 IsEmpty]: Start isEmpty. Operand 2222 states and 6547 transitions. [2021-06-05 04:34:03,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:34:03,869 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:03,869 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:04,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 454 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3811 [2021-06-05 04:34:04,069 INFO L430 AbstractCegarLoop]: === Iteration 464 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:04,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:04,070 INFO L82 PathProgramCache]: Analyzing trace with hash 487830270, now seen corresponding path program 450 times [2021-06-05 04:34:04,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:04,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078340366] [2021-06-05 04:34:04,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:04,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:04,175 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:04,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:04,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078340366] [2021-06-05 04:34:04,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078340366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:04,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716021499] [2021-06-05 04:34:04,175 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:04,205 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:34:04,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:04,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:34:04,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:04,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:04,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:04,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:34:04,341 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:04,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:04,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:04,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:34:04,345 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:04,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:04,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:04,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:34:04,348 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:04,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:04,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:34:04,351 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:04,386 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:34:04,386 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:34:04,386 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:34:04,386 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:34:04,460 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:04,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716021499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:04,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:04,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-05 04:34:04,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482900028] [2021-06-05 04:34:04,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:34:04,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:04,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:34:04,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:34:04,461 INFO L87 Difference]: Start difference. First operand 2222 states and 6547 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:05,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:05,312 INFO L93 Difference]: Finished difference Result 2473 states and 7056 transitions. [2021-06-05 04:34:05,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 04:34:05,312 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:34:05,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:05,315 INFO L225 Difference]: With dead ends: 2473 [2021-06-05 04:34:05,315 INFO L226 Difference]: Without dead ends: 2463 [2021-06-05 04:34:05,315 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 800.5ms TimeCoverageRelationStatistics Valid=185, Invalid=1537, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 04:34:05,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2463 states. [2021-06-05 04:34:05,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2463 to 2231. [2021-06-05 04:34:05,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2231 states, 2230 states have (on average 2.947085201793722) internal successors, (6572), 2230 states have internal predecessors, (6572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:05,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2231 states to 2231 states and 6572 transitions. [2021-06-05 04:34:05,353 INFO L78 Accepts]: Start accepts. Automaton has 2231 states and 6572 transitions. Word has length 19 [2021-06-05 04:34:05,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:05,353 INFO L482 AbstractCegarLoop]: Abstraction has 2231 states and 6572 transitions. [2021-06-05 04:34:05,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:05,353 INFO L276 IsEmpty]: Start isEmpty. Operand 2231 states and 6572 transitions. [2021-06-05 04:34:05,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:34:05,355 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:05,355 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:05,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 455 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3815 [2021-06-05 04:34:05,555 INFO L430 AbstractCegarLoop]: === Iteration 465 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:05,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:05,556 INFO L82 PathProgramCache]: Analyzing trace with hash -2088793320, now seen corresponding path program 451 times [2021-06-05 04:34:05,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:05,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565260881] [2021-06-05 04:34:05,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:05,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:05,663 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:05,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:05,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565260881] [2021-06-05 04:34:05,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565260881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:05,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285292308] [2021-06-05 04:34:05,664 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:05,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:05,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:34:05,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:05,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:05,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:05,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:34:05,830 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:05,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:05,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:05,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:34:05,834 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:05,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:05,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:05,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:34:05,837 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:05,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:05,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:34:05,840 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:05,875 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:34:05,875 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:34:05,876 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:34:05,876 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:34:05,928 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:05,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285292308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:05,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:05,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-05 04:34:05,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050337048] [2021-06-05 04:34:05,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:34:05,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:05,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:34:05,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:34:05,929 INFO L87 Difference]: Start difference. First operand 2231 states and 6572 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:06,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:06,581 INFO L93 Difference]: Finished difference Result 2450 states and 7009 transitions. [2021-06-05 04:34:06,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 04:34:06,581 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:34:06,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:06,583 INFO L225 Difference]: With dead ends: 2450 [2021-06-05 04:34:06,583 INFO L226 Difference]: Without dead ends: 2450 [2021-06-05 04:34:06,584 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 575.4ms TimeCoverageRelationStatistics Valid=150, Invalid=1040, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:34:06,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2450 states. [2021-06-05 04:34:06,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2450 to 2209. [2021-06-05 04:34:06,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2209 states, 2208 states have (on average 2.9384057971014492) internal successors, (6488), 2208 states have internal predecessors, (6488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:06,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2209 states to 2209 states and 6488 transitions. [2021-06-05 04:34:06,605 INFO L78 Accepts]: Start accepts. Automaton has 2209 states and 6488 transitions. Word has length 19 [2021-06-05 04:34:06,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:06,605 INFO L482 AbstractCegarLoop]: Abstraction has 2209 states and 6488 transitions. [2021-06-05 04:34:06,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:06,606 INFO L276 IsEmpty]: Start isEmpty. Operand 2209 states and 6488 transitions. [2021-06-05 04:34:06,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:34:06,607 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:06,608 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:06,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3820,456 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:06,808 INFO L430 AbstractCegarLoop]: === Iteration 466 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:06,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:06,808 INFO L82 PathProgramCache]: Analyzing trace with hash 495560668, now seen corresponding path program 452 times [2021-06-05 04:34:06,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:06,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662676916] [2021-06-05 04:34:06,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:06,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:06,909 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:06,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:06,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662676916] [2021-06-05 04:34:06,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662676916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:06,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493429166] [2021-06-05 04:34:06,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:06,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:34:06,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:06,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:34:06,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:07,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:07,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:07,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:34:07,132 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:07,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:07,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:34:07,136 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:07,160 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:34:07,161 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:34:07,161 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:34:07,161 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:34:07,183 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:07,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493429166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:07,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:07,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-05 04:34:07,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522125529] [2021-06-05 04:34:07,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:34:07,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:07,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:34:07,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:34:07,184 INFO L87 Difference]: Start difference. First operand 2209 states and 6488 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:08,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:08,037 INFO L93 Difference]: Finished difference Result 2513 states and 7080 transitions. [2021-06-05 04:34:08,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 04:34:08,038 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:34:08,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:08,040 INFO L225 Difference]: With dead ends: 2513 [2021-06-05 04:34:08,040 INFO L226 Difference]: Without dead ends: 2507 [2021-06-05 04:34:08,041 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 693.1ms TimeCoverageRelationStatistics Valid=201, Invalid=1605, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 04:34:08,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2507 states. [2021-06-05 04:34:08,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2507 to 2188. [2021-06-05 04:34:08,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2188 states, 2187 states have (on average 2.9350708733424784) internal successors, (6419), 2187 states have internal predecessors, (6419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:08,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2188 states to 2188 states and 6419 transitions. [2021-06-05 04:34:08,063 INFO L78 Accepts]: Start accepts. Automaton has 2188 states and 6419 transitions. Word has length 19 [2021-06-05 04:34:08,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:08,063 INFO L482 AbstractCegarLoop]: Abstraction has 2188 states and 6419 transitions. [2021-06-05 04:34:08,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:08,063 INFO L276 IsEmpty]: Start isEmpty. Operand 2188 states and 6419 transitions. [2021-06-05 04:34:08,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:34:08,065 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:08,065 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:08,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 457 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3824 [2021-06-05 04:34:08,265 INFO L430 AbstractCegarLoop]: === Iteration 467 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:08,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:08,265 INFO L82 PathProgramCache]: Analyzing trace with hash -993844328, now seen corresponding path program 453 times [2021-06-05 04:34:08,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:08,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074065450] [2021-06-05 04:34:08,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:08,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:08,361 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:08,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:08,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074065450] [2021-06-05 04:34:08,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074065450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:08,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410547663] [2021-06-05 04:34:08,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:08,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:34:08,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:08,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:34:08,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:08,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:08,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:08,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:34:08,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:08,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:08,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:34:08,572 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:08,596 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:34:08,597 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:34:08,597 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:34:08,597 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:34:08,620 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:08,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410547663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:08,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:08,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-05 04:34:08,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640953909] [2021-06-05 04:34:08,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:34:08,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:08,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:34:08,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:34:08,621 INFO L87 Difference]: Start difference. First operand 2188 states and 6419 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:09,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:09,819 INFO L93 Difference]: Finished difference Result 2513 states and 7095 transitions. [2021-06-05 04:34:09,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 04:34:09,819 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:34:09,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:09,822 INFO L225 Difference]: With dead ends: 2513 [2021-06-05 04:34:09,822 INFO L226 Difference]: Without dead ends: 2513 [2021-06-05 04:34:09,822 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 948.5ms TimeCoverageRelationStatistics Valid=292, Invalid=2258, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 04:34:09,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2513 states. [2021-06-05 04:34:09,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2513 to 2207. [2021-06-05 04:34:09,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2207 states, 2206 states have (on average 2.9324569356301) internal successors, (6469), 2206 states have internal predecessors, (6469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:09,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2207 states to 2207 states and 6469 transitions. [2021-06-05 04:34:09,843 INFO L78 Accepts]: Start accepts. Automaton has 2207 states and 6469 transitions. Word has length 19 [2021-06-05 04:34:09,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:09,843 INFO L482 AbstractCegarLoop]: Abstraction has 2207 states and 6469 transitions. [2021-06-05 04:34:09,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:09,843 INFO L276 IsEmpty]: Start isEmpty. Operand 2207 states and 6469 transitions. [2021-06-05 04:34:09,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:34:09,845 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:09,845 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:10,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 458 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3827 [2021-06-05 04:34:10,046 INFO L430 AbstractCegarLoop]: === Iteration 468 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:10,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:10,046 INFO L82 PathProgramCache]: Analyzing trace with hash 79241052, now seen corresponding path program 454 times [2021-06-05 04:34:10,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:10,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206982399] [2021-06-05 04:34:10,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:10,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:10,140 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:10,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:10,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206982399] [2021-06-05 04:34:10,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206982399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:10,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033159792] [2021-06-05 04:34:10,140 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:10,169 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:34:10,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:10,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:34:10,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:10,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:10,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:10,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:34:10,343 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:10,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:10,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:34:10,346 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:10,369 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:34:10,369 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:34:10,370 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:34:10,370 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:34:10,393 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:10,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033159792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:10,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:10,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-05 04:34:10,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670820104] [2021-06-05 04:34:10,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:34:10,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:10,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:34:10,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:34:10,394 INFO L87 Difference]: Start difference. First operand 2207 states and 6469 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:10,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:10,691 INFO L93 Difference]: Finished difference Result 2348 states and 6752 transitions. [2021-06-05 04:34:10,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:34:10,691 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:34:10,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:10,693 INFO L225 Difference]: With dead ends: 2348 [2021-06-05 04:34:10,693 INFO L226 Difference]: Without dead ends: 2348 [2021-06-05 04:34:10,693 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 229.3ms TimeCoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:34:10,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2348 states. [2021-06-05 04:34:10,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2348 to 2194. [2021-06-05 04:34:10,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2194 states, 2193 states have (on average 2.93296853625171) internal successors, (6432), 2193 states have internal predecessors, (6432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:10,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2194 states to 2194 states and 6432 transitions. [2021-06-05 04:34:10,714 INFO L78 Accepts]: Start accepts. Automaton has 2194 states and 6432 transitions. Word has length 19 [2021-06-05 04:34:10,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:10,715 INFO L482 AbstractCegarLoop]: Abstraction has 2194 states and 6432 transitions. [2021-06-05 04:34:10,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:10,715 INFO L276 IsEmpty]: Start isEmpty. Operand 2194 states and 6432 transitions. [2021-06-05 04:34:10,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:34:10,717 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:10,717 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:10,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3830,459 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:10,917 INFO L430 AbstractCegarLoop]: === Iteration 469 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:10,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:10,917 INFO L82 PathProgramCache]: Analyzing trace with hash 974084634, now seen corresponding path program 455 times [2021-06-05 04:34:10,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:10,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200073699] [2021-06-05 04:34:10,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:10,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:11,038 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:11,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:11,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200073699] [2021-06-05 04:34:11,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200073699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:11,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636444093] [2021-06-05 04:34:11,039 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:11,069 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:34:11,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:11,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:34:11,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:11,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:11,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:11,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:34:11,220 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:11,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:11,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:11,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:34:11,224 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:11,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:11,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:11,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:34:11,227 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:11,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:11,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:34:11,230 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:11,264 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:34:11,264 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:34:11,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:34:11,264 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:34:11,320 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:11,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636444093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:11,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:11,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 04:34:11,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51145802] [2021-06-05 04:34:11,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:34:11,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:11,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:34:11,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:34:11,320 INFO L87 Difference]: Start difference. First operand 2194 states and 6432 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:11,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:11,626 INFO L93 Difference]: Finished difference Result 2389 states and 6806 transitions. [2021-06-05 04:34:11,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:34:11,626 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:34:11,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:11,629 INFO L225 Difference]: With dead ends: 2389 [2021-06-05 04:34:11,629 INFO L226 Difference]: Without dead ends: 2389 [2021-06-05 04:34:11,629 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 341.9ms TimeCoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:34:11,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2389 states. [2021-06-05 04:34:11,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2389 to 2215. [2021-06-05 04:34:11,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2215 states, 2214 states have (on average 2.93676603432701) internal successors, (6502), 2214 states have internal predecessors, (6502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:11,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2215 states to 2215 states and 6502 transitions. [2021-06-05 04:34:11,660 INFO L78 Accepts]: Start accepts. Automaton has 2215 states and 6502 transitions. Word has length 19 [2021-06-05 04:34:11,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:11,660 INFO L482 AbstractCegarLoop]: Abstraction has 2215 states and 6502 transitions. [2021-06-05 04:34:11,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:11,660 INFO L276 IsEmpty]: Start isEmpty. Operand 2215 states and 6502 transitions. [2021-06-05 04:34:11,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:34:11,662 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:11,662 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:11,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3833,460 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:11,863 INFO L430 AbstractCegarLoop]: === Iteration 470 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:11,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:11,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1775700862, now seen corresponding path program 456 times [2021-06-05 04:34:11,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:11,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512882747] [2021-06-05 04:34:11,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:11,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:11,983 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:11,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:11,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512882747] [2021-06-05 04:34:11,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512882747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:11,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110214566] [2021-06-05 04:34:11,983 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:12,013 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:34:12,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:12,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:34:12,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:12,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:12,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:12,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:34:12,164 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:12,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:12,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:12,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:34:12,167 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:12,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:12,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:12,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:34:12,171 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:12,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:12,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:34:12,174 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:12,208 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:34:12,208 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:34:12,209 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:34:12,209 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:34:12,284 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:12,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110214566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:12,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:12,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 04:34:12,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320201256] [2021-06-05 04:34:12,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:34:12,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:12,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:34:12,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:34:12,285 INFO L87 Difference]: Start difference. First operand 2215 states and 6502 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:13,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:13,402 INFO L93 Difference]: Finished difference Result 2423 states and 6873 transitions. [2021-06-05 04:34:13,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 04:34:13,402 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:34:13,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:13,404 INFO L225 Difference]: With dead ends: 2423 [2021-06-05 04:34:13,404 INFO L226 Difference]: Without dead ends: 2411 [2021-06-05 04:34:13,405 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 946.9ms TimeCoverageRelationStatistics Valid=200, Invalid=1780, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 04:34:13,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2411 states. [2021-06-05 04:34:13,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2411 to 2221. [2021-06-05 04:34:13,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2221 states, 2220 states have (on average 2.9364864864864866) internal successors, (6519), 2220 states have internal predecessors, (6519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:13,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2221 states to 2221 states and 6519 transitions. [2021-06-05 04:34:13,427 INFO L78 Accepts]: Start accepts. Automaton has 2221 states and 6519 transitions. Word has length 19 [2021-06-05 04:34:13,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:13,427 INFO L482 AbstractCegarLoop]: Abstraction has 2221 states and 6519 transitions. [2021-06-05 04:34:13,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:13,427 INFO L276 IsEmpty]: Start isEmpty. Operand 2221 states and 6519 transitions. [2021-06-05 04:34:13,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:34:13,429 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:13,429 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:13,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 461 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3837 [2021-06-05 04:34:13,629 INFO L430 AbstractCegarLoop]: === Iteration 471 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:13,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:13,630 INFO L82 PathProgramCache]: Analyzing trace with hash -800922728, now seen corresponding path program 457 times [2021-06-05 04:34:13,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:13,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149642024] [2021-06-05 04:34:13,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:13,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:13,752 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:13,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:13,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149642024] [2021-06-05 04:34:13,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149642024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:13,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921908324] [2021-06-05 04:34:13,752 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:13,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:13,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:34:13,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:13,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:13,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:13,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:34:13,932 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:13,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:13,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:13,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:34:13,936 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:13,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:13,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:13,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:34:13,939 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:13,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:13,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:34:13,942 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:13,976 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:34:13,977 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:34:13,977 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:34:13,977 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:34:14,032 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:14,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921908324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:14,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:14,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 04:34:14,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859711736] [2021-06-05 04:34:14,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:34:14,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:14,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:34:14,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:34:14,032 INFO L87 Difference]: Start difference. First operand 2221 states and 6519 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:14,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:14,626 INFO L93 Difference]: Finished difference Result 2391 states and 6825 transitions. [2021-06-05 04:34:14,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:34:14,626 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:34:14,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:14,629 INFO L225 Difference]: With dead ends: 2391 [2021-06-05 04:34:14,629 INFO L226 Difference]: Without dead ends: 2391 [2021-06-05 04:34:14,629 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 593.8ms TimeCoverageRelationStatistics Valid=138, Invalid=984, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 04:34:14,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2021-06-05 04:34:14,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 2207. [2021-06-05 04:34:14,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2207 states, 2206 states have (on average 2.931097008159565) internal successors, (6466), 2206 states have internal predecessors, (6466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:14,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2207 states to 2207 states and 6466 transitions. [2021-06-05 04:34:14,650 INFO L78 Accepts]: Start accepts. Automaton has 2207 states and 6466 transitions. Word has length 19 [2021-06-05 04:34:14,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:14,650 INFO L482 AbstractCegarLoop]: Abstraction has 2207 states and 6466 transitions. [2021-06-05 04:34:14,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:14,650 INFO L276 IsEmpty]: Start isEmpty. Operand 2207 states and 6466 transitions. [2021-06-05 04:34:14,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:34:14,665 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:14,665 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:14,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 462 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3842 [2021-06-05 04:34:14,865 INFO L430 AbstractCegarLoop]: === Iteration 472 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:14,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:14,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1783431260, now seen corresponding path program 458 times [2021-06-05 04:34:14,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:14,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063064594] [2021-06-05 04:34:14,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:14,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:14,981 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:14,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:14,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063064594] [2021-06-05 04:34:14,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063064594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:14,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710469283] [2021-06-05 04:34:14,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:15,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:34:15,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:15,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:34:15,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:15,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:15,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:15,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:34:15,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:15,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:15,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:34:15,196 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:15,219 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:34:15,219 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:34:15,220 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:34:15,220 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:34:15,243 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:15,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710469283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:15,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:15,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 04:34:15,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917460609] [2021-06-05 04:34:15,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:34:15,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:15,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:34:15,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:34:15,244 INFO L87 Difference]: Start difference. First operand 2207 states and 6466 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:16,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:16,213 INFO L93 Difference]: Finished difference Result 2494 states and 7014 transitions. [2021-06-05 04:34:16,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 04:34:16,214 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:34:16,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:16,216 INFO L225 Difference]: With dead ends: 2494 [2021-06-05 04:34:16,217 INFO L226 Difference]: Without dead ends: 2494 [2021-06-05 04:34:16,217 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 726.7ms TimeCoverageRelationStatistics Valid=209, Invalid=1683, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 04:34:16,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2494 states. [2021-06-05 04:34:16,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2494 to 2205. [2021-06-05 04:34:16,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2205 states, 2204 states have (on average 2.9310344827586206) internal successors, (6460), 2204 states have internal predecessors, (6460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:16,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2205 states to 2205 states and 6460 transitions. [2021-06-05 04:34:16,252 INFO L78 Accepts]: Start accepts. Automaton has 2205 states and 6460 transitions. Word has length 19 [2021-06-05 04:34:16,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:16,252 INFO L482 AbstractCegarLoop]: Abstraction has 2205 states and 6460 transitions. [2021-06-05 04:34:16,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:16,253 INFO L276 IsEmpty]: Start isEmpty. Operand 2205 states and 6460 transitions. [2021-06-05 04:34:16,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:34:16,255 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:16,255 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:16,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3846,463 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:16,455 INFO L430 AbstractCegarLoop]: === Iteration 473 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:16,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:16,455 INFO L82 PathProgramCache]: Analyzing trace with hash 294026264, now seen corresponding path program 459 times [2021-06-05 04:34:16,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:16,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838030681] [2021-06-05 04:34:16,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:16,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:16,565 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:16,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:16,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838030681] [2021-06-05 04:34:16,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838030681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:16,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471742618] [2021-06-05 04:34:16,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:16,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:34:16,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:16,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:34:16,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:16,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:16,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:16,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:34:16,774 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:16,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:16,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:34:16,777 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:16,801 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:34:16,801 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:34:16,802 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:34:16,802 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:34:16,825 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:16,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471742618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:16,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:16,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 04:34:16,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886502079] [2021-06-05 04:34:16,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:34:16,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:16,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:34:16,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:34:16,826 INFO L87 Difference]: Start difference. First operand 2205 states and 6460 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:18,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:18,394 INFO L93 Difference]: Finished difference Result 2625 states and 7276 transitions. [2021-06-05 04:34:18,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 04:34:18,394 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:34:18,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:18,397 INFO L225 Difference]: With dead ends: 2625 [2021-06-05 04:34:18,397 INFO L226 Difference]: Without dead ends: 2625 [2021-06-05 04:34:18,397 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1187 ImplicationChecksByTransitivity, 1290.5ms TimeCoverageRelationStatistics Valid=427, Invalid=3605, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 04:34:18,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2625 states. [2021-06-05 04:34:18,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2625 to 2206. [2021-06-05 04:34:18,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2206 states, 2205 states have (on average 2.931065759637188) internal successors, (6463), 2205 states have internal predecessors, (6463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:18,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2206 states to 2206 states and 6463 transitions. [2021-06-05 04:34:18,421 INFO L78 Accepts]: Start accepts. Automaton has 2206 states and 6463 transitions. Word has length 19 [2021-06-05 04:34:18,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:18,421 INFO L482 AbstractCegarLoop]: Abstraction has 2206 states and 6463 transitions. [2021-06-05 04:34:18,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:18,421 INFO L276 IsEmpty]: Start isEmpty. Operand 2206 states and 6463 transitions. [2021-06-05 04:34:18,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:34:18,423 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:18,423 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:18,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 464 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3849 [2021-06-05 04:34:18,624 INFO L430 AbstractCegarLoop]: === Iteration 474 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:18,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:18,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1367111644, now seen corresponding path program 460 times [2021-06-05 04:34:18,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:18,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255409805] [2021-06-05 04:34:18,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:18,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:18,733 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:18,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:18,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255409805] [2021-06-05 04:34:18,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255409805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:18,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250707777] [2021-06-05 04:34:18,733 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:18,776 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:34:18,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:18,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:34:18,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:18,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:18,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:18,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:34:18,957 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:18,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:18,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:34:18,960 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:18,983 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:34:18,984 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:34:18,984 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:34:18,984 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:34:19,008 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:19,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250707777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:19,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:19,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 04:34:19,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737753805] [2021-06-05 04:34:19,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:34:19,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:19,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:34:19,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:34:19,009 INFO L87 Difference]: Start difference. First operand 2206 states and 6463 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:21,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:21,620 INFO L93 Difference]: Finished difference Result 2591 states and 7250 transitions. [2021-06-05 04:34:21,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-06-05 04:34:21,620 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:34:21,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:21,623 INFO L225 Difference]: With dead ends: 2591 [2021-06-05 04:34:21,623 INFO L226 Difference]: Without dead ends: 2591 [2021-06-05 04:34:21,623 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2258 ImplicationChecksByTransitivity, 2107.3ms TimeCoverageRelationStatistics Valid=748, Invalid=6392, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 04:34:21,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2591 states. [2021-06-05 04:34:21,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2591 to 2208. [2021-06-05 04:34:21,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2208 states, 2207 states have (on average 2.931128228364295) internal successors, (6469), 2207 states have internal predecessors, (6469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:21,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2208 states to 2208 states and 6469 transitions. [2021-06-05 04:34:21,644 INFO L78 Accepts]: Start accepts. Automaton has 2208 states and 6469 transitions. Word has length 19 [2021-06-05 04:34:21,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:21,644 INFO L482 AbstractCegarLoop]: Abstraction has 2208 states and 6469 transitions. [2021-06-05 04:34:21,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:21,644 INFO L276 IsEmpty]: Start isEmpty. Operand 2208 states and 6469 transitions. [2021-06-05 04:34:21,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:34:21,646 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:21,646 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:21,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3852,465 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:21,846 INFO L430 AbstractCegarLoop]: === Iteration 475 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:21,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:21,846 INFO L82 PathProgramCache]: Analyzing trace with hash 273020056, now seen corresponding path program 461 times [2021-06-05 04:34:21,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:21,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093929573] [2021-06-05 04:34:21,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:21,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:21,955 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:21,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:21,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093929573] [2021-06-05 04:34:21,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093929573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:21,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390248094] [2021-06-05 04:34:21,956 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:21,986 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:34:21,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:21,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:34:21,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:22,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:22,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:22,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:34:22,162 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:22,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:22,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:34:22,165 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:22,189 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:34:22,189 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:34:22,189 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:34:22,189 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:34:22,214 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:22,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390248094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:22,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:22,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 04:34:22,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963639722] [2021-06-05 04:34:22,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:34:22,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:22,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:34:22,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:34:22,214 INFO L87 Difference]: Start difference. First operand 2208 states and 6469 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:22,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:22,534 INFO L93 Difference]: Finished difference Result 2306 states and 6668 transitions. [2021-06-05 04:34:22,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:34:22,535 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:34:22,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:22,537 INFO L225 Difference]: With dead ends: 2306 [2021-06-05 04:34:22,537 INFO L226 Difference]: Without dead ends: 2306 [2021-06-05 04:34:22,538 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 246.7ms TimeCoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:34:22,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2306 states. [2021-06-05 04:34:22,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2306 to 2208. [2021-06-05 04:34:22,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2208 states, 2207 states have (on average 2.931128228364295) internal successors, (6469), 2207 states have internal predecessors, (6469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:22,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2208 states to 2208 states and 6469 transitions. [2021-06-05 04:34:22,569 INFO L78 Accepts]: Start accepts. Automaton has 2208 states and 6469 transitions. Word has length 19 [2021-06-05 04:34:22,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:22,569 INFO L482 AbstractCegarLoop]: Abstraction has 2208 states and 6469 transitions. [2021-06-05 04:34:22,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:22,569 INFO L276 IsEmpty]: Start isEmpty. Operand 2208 states and 6469 transitions. [2021-06-05 04:34:22,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:34:22,571 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:22,571 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:22,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3855,466 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:22,772 INFO L430 AbstractCegarLoop]: === Iteration 476 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:22,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:22,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1211565410, now seen corresponding path program 462 times [2021-06-05 04:34:22,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:22,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317615727] [2021-06-05 04:34:22,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:22,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:22,877 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:22,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:22,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317615727] [2021-06-05 04:34:22,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317615727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:22,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482049947] [2021-06-05 04:34:22,877 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:22,906 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:34:22,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:22,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:34:22,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:23,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:23,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:23,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:34:23,075 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:23,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:23,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:34:23,078 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:23,096 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-06-05 04:34:23,096 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:34:23,097 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:34:23,097 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-06-05 04:34:23,123 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:23,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482049947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:23,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:23,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 04:34:23,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594654970] [2021-06-05 04:34:23,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:34:23,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:23,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:34:23,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:34:23,124 INFO L87 Difference]: Start difference. First operand 2208 states and 6469 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:23,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:23,508 INFO L93 Difference]: Finished difference Result 2441 states and 6959 transitions. [2021-06-05 04:34:23,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:34:23,509 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:34:23,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:23,511 INFO L225 Difference]: With dead ends: 2441 [2021-06-05 04:34:23,511 INFO L226 Difference]: Without dead ends: 2441 [2021-06-05 04:34:23,511 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 321.3ms TimeCoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:34:23,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2441 states. [2021-06-05 04:34:23,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2441 to 2268. [2021-06-05 04:34:23,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2268 states, 2267 states have (on average 2.941773268636965) internal successors, (6669), 2267 states have internal predecessors, (6669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:23,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2268 states to 2268 states and 6669 transitions. [2021-06-05 04:34:23,532 INFO L78 Accepts]: Start accepts. Automaton has 2268 states and 6669 transitions. Word has length 19 [2021-06-05 04:34:23,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:23,532 INFO L482 AbstractCegarLoop]: Abstraction has 2268 states and 6669 transitions. [2021-06-05 04:34:23,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:23,533 INFO L276 IsEmpty]: Start isEmpty. Operand 2268 states and 6669 transitions. [2021-06-05 04:34:23,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:34:23,535 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:23,535 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:23,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3858,467 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:23,735 INFO L430 AbstractCegarLoop]: === Iteration 477 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:23,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:23,735 INFO L82 PathProgramCache]: Analyzing trace with hash -280682822, now seen corresponding path program 463 times [2021-06-05 04:34:23,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:23,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146828442] [2021-06-05 04:34:23,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:23,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:23,842 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:23,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:23,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146828442] [2021-06-05 04:34:23,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146828442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:23,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349679102] [2021-06-05 04:34:23,842 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:23,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:23,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:34:23,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:24,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:24,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:24,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:34:24,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:24,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:24,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:24,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:34:24,049 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:24,050 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:34:24,051 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:24,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:34:24,054 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:24,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:34:24,057 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:24,058 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:34:24,059 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:24,088 INFO L628 ElimStorePlain]: treesize reduction 21, result has 58.0 percent of original size [2021-06-05 04:34:24,088 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:34:24,089 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:34:24,089 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-06-05 04:34:24,125 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:24,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349679102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:24,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:24,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 04:34:24,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788333193] [2021-06-05 04:34:24,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:34:24,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:24,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:34:24,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:34:24,126 INFO L87 Difference]: Start difference. First operand 2268 states and 6669 transitions. Second operand has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:24,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:24,819 INFO L93 Difference]: Finished difference Result 2383 states and 6831 transitions. [2021-06-05 04:34:24,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 04:34:24,820 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:34:24,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:24,822 INFO L225 Difference]: With dead ends: 2383 [2021-06-05 04:34:24,822 INFO L226 Difference]: Without dead ends: 2375 [2021-06-05 04:34:24,822 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 551.1ms TimeCoverageRelationStatistics Valid=143, Invalid=1417, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 04:34:24,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2375 states. [2021-06-05 04:34:24,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2375 to 2275. [2021-06-05 04:34:24,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2275 states, 2274 states have (on average 2.936675461741425) internal successors, (6678), 2274 states have internal predecessors, (6678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:24,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2275 states to 2275 states and 6678 transitions. [2021-06-05 04:34:24,844 INFO L78 Accepts]: Start accepts. Automaton has 2275 states and 6678 transitions. Word has length 19 [2021-06-05 04:34:24,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:24,844 INFO L482 AbstractCegarLoop]: Abstraction has 2275 states and 6678 transitions. [2021-06-05 04:34:24,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:24,844 INFO L276 IsEmpty]: Start isEmpty. Operand 2275 states and 6678 transitions. [2021-06-05 04:34:24,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:34:24,846 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:24,846 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:25,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3860,468 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:25,047 INFO L430 AbstractCegarLoop]: === Iteration 478 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:25,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:25,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1922379772, now seen corresponding path program 464 times [2021-06-05 04:34:25,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:25,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613936848] [2021-06-05 04:34:25,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:25,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:25,152 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:25,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:25,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613936848] [2021-06-05 04:34:25,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613936848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:25,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725632213] [2021-06-05 04:34:25,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:25,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:34:25,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:25,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:34:25,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:25,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:25,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:25,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:34:25,357 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:25,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:25,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:34:25,360 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:25,379 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-06-05 04:34:25,379 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:34:25,380 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:34:25,380 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-06-05 04:34:25,406 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:25,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725632213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:25,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:25,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 04:34:25,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239424684] [2021-06-05 04:34:25,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:34:25,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:25,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:34:25,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:34:25,407 INFO L87 Difference]: Start difference. First operand 2275 states and 6678 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:26,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:26,858 INFO L93 Difference]: Finished difference Result 2619 states and 7342 transitions. [2021-06-05 04:34:26,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 04:34:26,858 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:34:26,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:26,861 INFO L225 Difference]: With dead ends: 2619 [2021-06-05 04:34:26,861 INFO L226 Difference]: Without dead ends: 2616 [2021-06-05 04:34:26,861 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 1247.1ms TimeCoverageRelationStatistics Valid=364, Invalid=3296, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 04:34:26,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2616 states. [2021-06-05 04:34:26,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2616 to 2292. [2021-06-05 04:34:26,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2292 states, 2291 states have (on average 2.939764295067656) internal successors, (6735), 2291 states have internal predecessors, (6735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:26,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2292 states to 2292 states and 6735 transitions. [2021-06-05 04:34:26,884 INFO L78 Accepts]: Start accepts. Automaton has 2292 states and 6735 transitions. Word has length 19 [2021-06-05 04:34:26,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:26,884 INFO L482 AbstractCegarLoop]: Abstraction has 2292 states and 6735 transitions. [2021-06-05 04:34:26,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:26,885 INFO L276 IsEmpty]: Start isEmpty. Operand 2292 states and 6735 transitions. [2021-06-05 04:34:26,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:34:26,887 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:26,887 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:27,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3865,469 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:27,087 INFO L430 AbstractCegarLoop]: === Iteration 479 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:27,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:27,087 INFO L82 PathProgramCache]: Analyzing trace with hash -818538400, now seen corresponding path program 465 times [2021-06-05 04:34:27,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:27,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930642287] [2021-06-05 04:34:27,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:27,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:27,198 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:27,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:27,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930642287] [2021-06-05 04:34:27,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930642287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:27,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917416081] [2021-06-05 04:34:27,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:27,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:34:27,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:27,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:34:27,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:27,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:27,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:27,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:34:27,423 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:27,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:27,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:27,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:34:27,426 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:27,428 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:34:27,429 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:27,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:34:27,432 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:27,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:34:27,434 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:27,436 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:34:27,437 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:27,465 INFO L628 ElimStorePlain]: treesize reduction 21, result has 58.0 percent of original size [2021-06-05 04:34:27,466 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:34:27,466 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:34:27,466 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-06-05 04:34:27,502 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:27,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917416081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:27,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:27,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 04:34:27,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120848863] [2021-06-05 04:34:27,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:34:27,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:27,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:34:27,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:34:27,502 INFO L87 Difference]: Start difference. First operand 2292 states and 6735 transitions. Second operand has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:28,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:28,366 INFO L93 Difference]: Finished difference Result 2421 states and 6932 transitions. [2021-06-05 04:34:28,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 04:34:28,367 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:34:28,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:28,369 INFO L225 Difference]: With dead ends: 2421 [2021-06-05 04:34:28,369 INFO L226 Difference]: Without dead ends: 2415 [2021-06-05 04:34:28,369 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 796.8ms TimeCoverageRelationStatistics Valid=206, Invalid=1956, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 04:34:28,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2415 states. [2021-06-05 04:34:28,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2415 to 2298. [2021-06-05 04:34:28,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2298 states, 2297 states have (on average 2.936003482803657) internal successors, (6744), 2297 states have internal predecessors, (6744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:28,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2298 states to 2298 states and 6744 transitions. [2021-06-05 04:34:28,393 INFO L78 Accepts]: Start accepts. Automaton has 2298 states and 6744 transitions. Word has length 19 [2021-06-05 04:34:28,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:28,393 INFO L482 AbstractCegarLoop]: Abstraction has 2298 states and 6744 transitions. [2021-06-05 04:34:28,393 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:28,393 INFO L276 IsEmpty]: Start isEmpty. Operand 2298 states and 6744 transitions. [2021-06-05 04:34:28,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:34:28,395 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:28,395 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:28,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3867,470 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:28,595 INFO L430 AbstractCegarLoop]: === Iteration 480 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:28,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:28,595 INFO L82 PathProgramCache]: Analyzing trace with hash -2132945186, now seen corresponding path program 466 times [2021-06-05 04:34:28,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:28,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945261609] [2021-06-05 04:34:28,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:28,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:28,703 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:28,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:28,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945261609] [2021-06-05 04:34:28,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945261609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:28,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886905642] [2021-06-05 04:34:28,704 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:28,732 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:34:28,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:28,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:34:28,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:28,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:28,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:28,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:34:28,924 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:28,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:28,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:34:28,928 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:28,946 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-06-05 04:34:28,946 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:34:28,946 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:34:28,946 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-06-05 04:34:28,973 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:28,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886905642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:28,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:28,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 04:34:28,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965591676] [2021-06-05 04:34:28,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:34:28,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:28,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:34:28,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:34:28,973 INFO L87 Difference]: Start difference. First operand 2298 states and 6744 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:30,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:30,220 INFO L93 Difference]: Finished difference Result 2660 states and 7469 transitions. [2021-06-05 04:34:30,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 04:34:30,221 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:34:30,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:30,223 INFO L225 Difference]: With dead ends: 2660 [2021-06-05 04:34:30,223 INFO L226 Difference]: Without dead ends: 2657 [2021-06-05 04:34:30,224 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 1058.8ms TimeCoverageRelationStatistics Valid=305, Invalid=2775, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 04:34:30,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2657 states. [2021-06-05 04:34:30,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2657 to 2336. [2021-06-05 04:34:30,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2336 states, 2335 states have (on average 2.9413276231263383) internal successors, (6868), 2335 states have internal predecessors, (6868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:30,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2336 states to 2336 states and 6868 transitions. [2021-06-05 04:34:30,247 INFO L78 Accepts]: Start accepts. Automaton has 2336 states and 6868 transitions. Word has length 19 [2021-06-05 04:34:30,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:30,247 INFO L482 AbstractCegarLoop]: Abstraction has 2336 states and 6868 transitions. [2021-06-05 04:34:30,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:30,247 INFO L276 IsEmpty]: Start isEmpty. Operand 2336 states and 6868 transitions. [2021-06-05 04:34:30,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:34:30,249 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:30,249 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:30,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3872,471 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:30,450 INFO L430 AbstractCegarLoop]: === Iteration 481 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:30,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:30,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1242321402, now seen corresponding path program 467 times [2021-06-05 04:34:30,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:30,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671434193] [2021-06-05 04:34:30,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:30,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:30,573 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:30,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:30,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671434193] [2021-06-05 04:34:30,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671434193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:30,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216319416] [2021-06-05 04:34:30,574 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:30,603 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:34:30,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:30,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:34:30,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:30,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:30,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:30,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:34:30,789 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:30,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:30,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:30,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:34:30,793 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:30,795 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:34:30,795 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:30,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:34:30,798 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:30,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:34:30,801 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:30,803 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:34:30,803 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:30,832 INFO L628 ElimStorePlain]: treesize reduction 21, result has 58.0 percent of original size [2021-06-05 04:34:30,832 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:34:30,833 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:34:30,833 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-06-05 04:34:30,868 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:30,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216319416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:30,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:30,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 04:34:30,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031121106] [2021-06-05 04:34:30,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:34:30,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:30,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:34:30,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:34:30,869 INFO L87 Difference]: Start difference. First operand 2336 states and 6868 transitions. Second operand has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:31,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:31,826 INFO L93 Difference]: Finished difference Result 2433 states and 7025 transitions. [2021-06-05 04:34:31,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 04:34:31,826 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:34:31,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:31,829 INFO L225 Difference]: With dead ends: 2433 [2021-06-05 04:34:31,829 INFO L226 Difference]: Without dead ends: 2429 [2021-06-05 04:34:31,829 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 806.6ms TimeCoverageRelationStatistics Valid=195, Invalid=1697, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 04:34:31,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2429 states. [2021-06-05 04:34:31,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2429 to 2339. [2021-06-05 04:34:31,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2339 states, 2338 states have (on average 2.9345594525235246) internal successors, (6861), 2338 states have internal predecessors, (6861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:31,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2339 states to 2339 states and 6861 transitions. [2021-06-05 04:34:31,851 INFO L78 Accepts]: Start accepts. Automaton has 2339 states and 6861 transitions. Word has length 19 [2021-06-05 04:34:31,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:31,851 INFO L482 AbstractCegarLoop]: Abstraction has 2339 states and 6861 transitions. [2021-06-05 04:34:31,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:31,851 INFO L276 IsEmpty]: Start isEmpty. Operand 2339 states and 6861 transitions. [2021-06-05 04:34:31,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:34:31,853 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:31,853 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:32,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3874,472 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:32,053 INFO L430 AbstractCegarLoop]: === Iteration 482 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:32,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:32,054 INFO L82 PathProgramCache]: Analyzing trace with hash -2125214788, now seen corresponding path program 468 times [2021-06-05 04:34:32,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:32,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2359194] [2021-06-05 04:34:32,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:32,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:32,184 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:32,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:32,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2359194] [2021-06-05 04:34:32,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2359194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:32,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563152699] [2021-06-05 04:34:32,185 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:32,215 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:34:32,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:32,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:34:32,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:32,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:32,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:32,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:34:32,375 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:32,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:32,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:32,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:34:32,379 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:32,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:32,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:32,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:34:32,382 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:32,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:32,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:34:32,385 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:32,419 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:34:32,420 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:34:32,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:34:32,420 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:34:32,479 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:32,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563152699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:32,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:32,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 04:34:32,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087535876] [2021-06-05 04:34:32,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:34:32,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:32,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:34:32,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:34:32,480 INFO L87 Difference]: Start difference. First operand 2339 states and 6861 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:33,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:33,574 INFO L93 Difference]: Finished difference Result 2643 states and 7373 transitions. [2021-06-05 04:34:33,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 04:34:33,575 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:34:33,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:33,577 INFO L225 Difference]: With dead ends: 2643 [2021-06-05 04:34:33,577 INFO L226 Difference]: Without dead ends: 2641 [2021-06-05 04:34:33,577 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 862.7ms TimeCoverageRelationStatistics Valid=225, Invalid=1755, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 04:34:33,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2641 states. [2021-06-05 04:34:33,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2641 to 2285. [2021-06-05 04:34:33,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2285 states, 2284 states have (on average 2.9229422066549913) internal successors, (6676), 2284 states have internal predecessors, (6676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:33,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2285 states to 2285 states and 6676 transitions. [2021-06-05 04:34:33,600 INFO L78 Accepts]: Start accepts. Automaton has 2285 states and 6676 transitions. Word has length 19 [2021-06-05 04:34:33,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:33,600 INFO L482 AbstractCegarLoop]: Abstraction has 2285 states and 6676 transitions. [2021-06-05 04:34:33,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:33,601 INFO L276 IsEmpty]: Start isEmpty. Operand 2285 states and 6676 transitions. [2021-06-05 04:34:33,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:34:33,603 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:33,603 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:33,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3879,473 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:33,803 INFO L430 AbstractCegarLoop]: === Iteration 483 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:33,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:33,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1323598560, now seen corresponding path program 469 times [2021-06-05 04:34:33,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:33,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843087766] [2021-06-05 04:34:33,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:33,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:33,921 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:33,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:33,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843087766] [2021-06-05 04:34:33,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843087766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:33,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105778574] [2021-06-05 04:34:33,921 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:33,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:33,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:34:33,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:34,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:34,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:34,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:34:34,110 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:34,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:34,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:34,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:34:34,113 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:34,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:34,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:34,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:34:34,117 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:34,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:34,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:34:34,120 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:34,154 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:34:34,154 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:34:34,155 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:34:34,155 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:34:34,235 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:34,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105778574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:34,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:34,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 04:34:34,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211105166] [2021-06-05 04:34:34,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:34:34,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:34,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:34:34,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:34:34,236 INFO L87 Difference]: Start difference. First operand 2285 states and 6676 transitions. Second operand has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:35,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:35,329 INFO L93 Difference]: Finished difference Result 2491 states and 7057 transitions. [2021-06-05 04:34:35,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 04:34:35,329 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:34:35,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:35,331 INFO L225 Difference]: With dead ends: 2491 [2021-06-05 04:34:35,331 INFO L226 Difference]: Without dead ends: 2487 [2021-06-05 04:34:35,331 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 979.3ms TimeCoverageRelationStatistics Valid=250, Invalid=2102, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 04:34:35,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2487 states. [2021-06-05 04:34:35,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2487 to 2293. [2021-06-05 04:34:35,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2293 states, 2292 states have (on average 2.9210296684118675) internal successors, (6695), 2292 states have internal predecessors, (6695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:35,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2293 states to 2293 states and 6695 transitions. [2021-06-05 04:34:35,356 INFO L78 Accepts]: Start accepts. Automaton has 2293 states and 6695 transitions. Word has length 19 [2021-06-05 04:34:35,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:35,357 INFO L482 AbstractCegarLoop]: Abstraction has 2293 states and 6695 transitions. [2021-06-05 04:34:35,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:35,357 INFO L276 IsEmpty]: Start isEmpty. Operand 2293 states and 6695 transitions. [2021-06-05 04:34:35,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:34:35,359 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:35,359 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:35,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3883,474 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:35,559 INFO L430 AbstractCegarLoop]: === Iteration 484 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:35,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:35,559 INFO L82 PathProgramCache]: Analyzing trace with hash 394745146, now seen corresponding path program 470 times [2021-06-05 04:34:35,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:35,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134008243] [2021-06-05 04:34:35,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:35,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:35,681 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:35,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:35,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134008243] [2021-06-05 04:34:35,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134008243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:35,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350648310] [2021-06-05 04:34:35,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:35,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:34:35,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:35,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:34:35,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:35,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:35,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:35,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:34:35,872 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:35,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:35,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:35,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:34:35,875 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:35,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:35,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:35,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:34:35,879 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:35,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:35,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:34:35,882 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:35,916 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:34:35,916 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:34:35,917 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:34:35,917 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:34:35,974 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:35,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350648310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:35,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:35,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 04:34:35,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505144084] [2021-06-05 04:34:35,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:34:35,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:35,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:34:35,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:34:35,975 INFO L87 Difference]: Start difference. First operand 2293 states and 6695 transitions. Second operand has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:36,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:36,684 INFO L93 Difference]: Finished difference Result 2462 states and 7000 transitions. [2021-06-05 04:34:36,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 04:34:36,684 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:34:36,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:36,686 INFO L225 Difference]: With dead ends: 2462 [2021-06-05 04:34:36,686 INFO L226 Difference]: Without dead ends: 2462 [2021-06-05 04:34:36,686 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 707.6ms TimeCoverageRelationStatistics Valid=186, Invalid=1296, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 04:34:36,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2462 states. [2021-06-05 04:34:36,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2462 to 2226. [2021-06-05 04:34:36,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2226 states, 2225 states have (on average 2.9087640449438203) internal successors, (6472), 2225 states have internal predecessors, (6472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:36,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2226 states to 2226 states and 6472 transitions. [2021-06-05 04:34:36,708 INFO L78 Accepts]: Start accepts. Automaton has 2226 states and 6472 transitions. Word has length 19 [2021-06-05 04:34:36,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:36,708 INFO L482 AbstractCegarLoop]: Abstraction has 2226 states and 6472 transitions. [2021-06-05 04:34:36,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:36,709 INFO L276 IsEmpty]: Start isEmpty. Operand 2226 states and 6472 transitions. [2021-06-05 04:34:36,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:34:36,711 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:36,711 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:36,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3888,475 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:36,911 INFO L430 AbstractCegarLoop]: === Iteration 485 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:36,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:36,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1611785190, now seen corresponding path program 471 times [2021-06-05 04:34:36,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:36,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803239615] [2021-06-05 04:34:36,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:36,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:37,008 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:34:37,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:37,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803239615] [2021-06-05 04:34:37,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803239615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:37,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076403072] [2021-06-05 04:34:37,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:37,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:34:37,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:37,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:34:37,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:37,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:37,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:37,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:34:37,184 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:37,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:37,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:37,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:34:37,187 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:37,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:37,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:37,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:34:37,191 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:37,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:37,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:34:37,194 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:37,228 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:34:37,229 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:34:37,229 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:34:37,229 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:34:37,300 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:37,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076403072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:37,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:37,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-05 04:34:37,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625100870] [2021-06-05 04:34:37,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:34:37,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:37,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:34:37,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:34:37,301 INFO L87 Difference]: Start difference. First operand 2226 states and 6472 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:38,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:38,363 INFO L93 Difference]: Finished difference Result 2355 states and 6707 transitions. [2021-06-05 04:34:38,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 04:34:38,363 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:34:38,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:38,365 INFO L225 Difference]: With dead ends: 2355 [2021-06-05 04:34:38,365 INFO L226 Difference]: Without dead ends: 2351 [2021-06-05 04:34:38,365 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 881.6ms TimeCoverageRelationStatistics Valid=248, Invalid=2202, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 04:34:38,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2351 states. [2021-06-05 04:34:38,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2351 to 2231. [2021-06-05 04:34:38,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2231 states, 2230 states have (on average 2.907174887892377) internal successors, (6483), 2230 states have internal predecessors, (6483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:38,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2231 states to 2231 states and 6483 transitions. [2021-06-05 04:34:38,387 INFO L78 Accepts]: Start accepts. Automaton has 2231 states and 6483 transitions. Word has length 19 [2021-06-05 04:34:38,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:38,388 INFO L482 AbstractCegarLoop]: Abstraction has 2231 states and 6483 transitions. [2021-06-05 04:34:38,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:38,388 INFO L276 IsEmpty]: Start isEmpty. Operand 2231 states and 6483 transitions. [2021-06-05 04:34:38,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:34:38,390 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:38,390 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:38,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 476 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3892 [2021-06-05 04:34:38,590 INFO L430 AbstractCegarLoop]: === Iteration 486 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:38,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:38,591 INFO L82 PathProgramCache]: Analyzing trace with hash 659341304, now seen corresponding path program 472 times [2021-06-05 04:34:38,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:38,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123293334] [2021-06-05 04:34:38,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:38,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:38,684 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:38,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:38,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123293334] [2021-06-05 04:34:38,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123293334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:38,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786797701] [2021-06-05 04:34:38,684 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:38,713 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:34:38,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:38,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:34:38,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:38,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:38,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:38,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:34:38,844 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:38,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:38,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:38,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:34:38,847 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:38,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:38,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:38,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:34:38,851 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:38,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:38,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:34:38,854 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:38,889 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:34:38,889 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:34:38,890 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:34:38,890 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:34:38,946 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:38,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786797701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:38,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:38,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-06-05 04:34:38,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80704729] [2021-06-05 04:34:38,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:34:38,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:38,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:34:38,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:34:38,947 INFO L87 Difference]: Start difference. First operand 2231 states and 6483 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:39,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:39,621 INFO L93 Difference]: Finished difference Result 2378 states and 6711 transitions. [2021-06-05 04:34:39,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 04:34:39,622 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:34:39,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:39,624 INFO L225 Difference]: With dead ends: 2378 [2021-06-05 04:34:39,624 INFO L226 Difference]: Without dead ends: 2377 [2021-06-05 04:34:39,625 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 551.0ms TimeCoverageRelationStatistics Valid=163, Invalid=1097, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 04:34:39,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2377 states. [2021-06-05 04:34:39,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2377 to 2202. [2021-06-05 04:34:39,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2202 states, 2201 states have (on average 2.9000454338936845) internal successors, (6383), 2201 states have internal predecessors, (6383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:39,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2202 states to 2202 states and 6383 transitions. [2021-06-05 04:34:39,647 INFO L78 Accepts]: Start accepts. Automaton has 2202 states and 6383 transitions. Word has length 19 [2021-06-05 04:34:39,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:39,647 INFO L482 AbstractCegarLoop]: Abstraction has 2202 states and 6383 transitions. [2021-06-05 04:34:39,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:39,648 INFO L276 IsEmpty]: Start isEmpty. Operand 2202 states and 6383 transitions. [2021-06-05 04:34:39,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:34:39,650 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:39,650 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:39,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3898,477 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:39,850 INFO L430 AbstractCegarLoop]: === Iteration 487 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:39,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:39,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1460957532, now seen corresponding path program 473 times [2021-06-05 04:34:39,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:39,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245928289] [2021-06-05 04:34:39,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:39,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:39,952 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:39,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:39,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245928289] [2021-06-05 04:34:39,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245928289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:39,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294827161] [2021-06-05 04:34:39,953 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:39,983 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:34:39,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:39,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:34:39,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:40,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:40,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:40,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:34:40,114 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:40,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:40,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:40,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:34:40,117 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:40,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:40,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:40,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:34:40,121 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:40,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:40,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:34:40,124 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:40,159 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:34:40,159 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:34:40,160 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:34:40,160 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:34:40,235 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:40,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294827161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:40,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:40,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-06-05 04:34:40,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363320284] [2021-06-05 04:34:40,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:34:40,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:40,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:34:40,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:34:40,236 INFO L87 Difference]: Start difference. First operand 2202 states and 6383 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:40,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:40,836 INFO L93 Difference]: Finished difference Result 2334 states and 6632 transitions. [2021-06-05 04:34:40,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 04:34:40,836 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:34:40,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:40,839 INFO L225 Difference]: With dead ends: 2334 [2021-06-05 04:34:40,839 INFO L226 Difference]: Without dead ends: 2328 [2021-06-05 04:34:40,839 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 611.1ms TimeCoverageRelationStatistics Valid=160, Invalid=1172, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 04:34:40,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-06-05 04:34:40,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 2212. [2021-06-05 04:34:40,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2212 states, 2211 states have (on average 2.895974672094075) internal successors, (6403), 2211 states have internal predecessors, (6403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:40,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2212 states to 2212 states and 6403 transitions. [2021-06-05 04:34:40,860 INFO L78 Accepts]: Start accepts. Automaton has 2212 states and 6403 transitions. Word has length 19 [2021-06-05 04:34:40,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:40,860 INFO L482 AbstractCegarLoop]: Abstraction has 2212 states and 6403 transitions. [2021-06-05 04:34:40,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:40,860 INFO L276 IsEmpty]: Start isEmpty. Operand 2212 states and 6403 transitions. [2021-06-05 04:34:40,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:34:40,862 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:40,862 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:41,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 478 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3902 [2021-06-05 04:34:41,063 INFO L430 AbstractCegarLoop]: === Iteration 488 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:41,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:41,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1115666058, now seen corresponding path program 474 times [2021-06-05 04:34:41,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:41,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770508216] [2021-06-05 04:34:41,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:41,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:41,153 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:41,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:41,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770508216] [2021-06-05 04:34:41,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770508216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:41,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411331520] [2021-06-05 04:34:41,153 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:41,182 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:34:41,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:41,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:34:41,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:41,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:41,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:41,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:34:41,313 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:41,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:41,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:41,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:34:41,316 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:41,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:41,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:41,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:34:41,320 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:41,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:41,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:34:41,323 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:41,374 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:34:41,374 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:34:41,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:34:41,375 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:34:41,469 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:41,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411331520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:41,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:41,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-06-05 04:34:41,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386202252] [2021-06-05 04:34:41,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:34:41,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:41,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:34:41,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:34:41,470 INFO L87 Difference]: Start difference. First operand 2212 states and 6403 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:41,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:41,975 INFO L93 Difference]: Finished difference Result 2328 states and 6621 transitions. [2021-06-05 04:34:41,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:34:41,975 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:34:41,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:41,977 INFO L225 Difference]: With dead ends: 2328 [2021-06-05 04:34:41,977 INFO L226 Difference]: Without dead ends: 2328 [2021-06-05 04:34:41,978 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 478.5ms TimeCoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:34:41,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-06-05 04:34:41,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 2205. [2021-06-05 04:34:41,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2205 states, 2204 states have (on average 2.8924682395644283) internal successors, (6375), 2204 states have internal predecessors, (6375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:41,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2205 states to 2205 states and 6375 transitions. [2021-06-05 04:34:41,998 INFO L78 Accepts]: Start accepts. Automaton has 2205 states and 6375 transitions. Word has length 19 [2021-06-05 04:34:41,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:41,998 INFO L482 AbstractCegarLoop]: Abstraction has 2205 states and 6375 transitions. [2021-06-05 04:34:41,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:41,998 INFO L276 IsEmpty]: Start isEmpty. Operand 2205 states and 6375 transitions. [2021-06-05 04:34:42,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:34:42,000 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:42,000 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:42,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 479 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3907 [2021-06-05 04:34:42,201 INFO L430 AbstractCegarLoop]: === Iteration 489 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:42,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:42,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1468687930, now seen corresponding path program 475 times [2021-06-05 04:34:42,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:42,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703002255] [2021-06-05 04:34:42,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:42,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:42,285 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:42,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:42,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703002255] [2021-06-05 04:34:42,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703002255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:42,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553970566] [2021-06-05 04:34:42,286 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:42,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:42,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:34:42,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:42,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:42,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:42,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:34:42,471 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:42,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:42,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:34:42,475 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:42,498 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:34:42,498 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:34:42,499 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:34:42,499 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:34:42,521 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:42,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553970566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:42,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:42,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-06-05 04:34:42,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7441392] [2021-06-05 04:34:42,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:34:42,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:42,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:34:42,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:34:42,522 INFO L87 Difference]: Start difference. First operand 2205 states and 6375 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:42,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:42,800 INFO L93 Difference]: Finished difference Result 2355 states and 6704 transitions. [2021-06-05 04:34:42,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:34:42,800 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:34:42,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:42,802 INFO L225 Difference]: With dead ends: 2355 [2021-06-05 04:34:42,802 INFO L226 Difference]: Without dead ends: 2355 [2021-06-05 04:34:42,803 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 252.0ms TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:34:42,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2355 states. [2021-06-05 04:34:42,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2355 to 2183. [2021-06-05 04:34:42,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2183 states, 2182 states have (on average 2.8900091659028413) internal successors, (6306), 2182 states have internal predecessors, (6306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:42,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2183 states to 2183 states and 6306 transitions. [2021-06-05 04:34:42,824 INFO L78 Accepts]: Start accepts. Automaton has 2183 states and 6306 transitions. Word has length 19 [2021-06-05 04:34:42,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:42,824 INFO L482 AbstractCegarLoop]: Abstraction has 2183 states and 6306 transitions. [2021-06-05 04:34:42,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:42,824 INFO L276 IsEmpty]: Start isEmpty. Operand 2183 states and 6306 transitions. [2021-06-05 04:34:42,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:34:42,826 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:42,826 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:43,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 480 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3911 [2021-06-05 04:34:43,026 INFO L430 AbstractCegarLoop]: === Iteration 490 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:43,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:43,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1615670042, now seen corresponding path program 476 times [2021-06-05 04:34:43,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:43,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483957262] [2021-06-05 04:34:43,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:43,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:43,124 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:34:43,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:43,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483957262] [2021-06-05 04:34:43,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483957262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:43,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654004451] [2021-06-05 04:34:43,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:43,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:34:43,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:43,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:34:43,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:43,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:43,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:43,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:34:43,277 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:43,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:43,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:43,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:34:43,280 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:43,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:43,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:43,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:34:43,283 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:43,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:43,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:34:43,286 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:43,321 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:34:43,322 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:34:43,322 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:34:43,322 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:34:43,388 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:43,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654004451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:43,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:43,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2021-06-05 04:34:43,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882402683] [2021-06-05 04:34:43,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:34:43,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:43,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:34:43,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:34:43,389 INFO L87 Difference]: Start difference. First operand 2183 states and 6306 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:43,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:43,995 INFO L93 Difference]: Finished difference Result 2246 states and 6416 transitions. [2021-06-05 04:34:43,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 04:34:43,996 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:34:43,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:43,998 INFO L225 Difference]: With dead ends: 2246 [2021-06-05 04:34:43,998 INFO L226 Difference]: Without dead ends: 2242 [2021-06-05 04:34:43,998 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 532.7ms TimeCoverageRelationStatistics Valid=148, Invalid=1112, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 04:34:43,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2242 states. [2021-06-05 04:34:44,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2242 to 2181. [2021-06-05 04:34:44,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2181 states, 2180 states have (on average 2.889908256880734) internal successors, (6300), 2180 states have internal predecessors, (6300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:44,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2181 states to 2181 states and 6300 transitions. [2021-06-05 04:34:44,018 INFO L78 Accepts]: Start accepts. Automaton has 2181 states and 6300 transitions. Word has length 19 [2021-06-05 04:34:44,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:44,018 INFO L482 AbstractCegarLoop]: Abstraction has 2181 states and 6300 transitions. [2021-06-05 04:34:44,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:44,018 INFO L276 IsEmpty]: Start isEmpty. Operand 2181 states and 6300 transitions. [2021-06-05 04:34:44,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:34:44,020 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:44,020 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:44,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3914,481 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:44,220 INFO L430 AbstractCegarLoop]: === Iteration 491 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:44,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:44,221 INFO L82 PathProgramCache]: Analyzing trace with hash -950249920, now seen corresponding path program 477 times [2021-06-05 04:34:44,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:44,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305631400] [2021-06-05 04:34:44,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:44,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:44,295 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:34:44,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:44,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305631400] [2021-06-05 04:34:44,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305631400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:44,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142261348] [2021-06-05 04:34:44,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:44,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:34:44,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:44,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:34:44,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:44,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:34:44,504 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:44,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:34:44,508 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:44,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:44,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:44,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:34:44,512 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:44,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:34:44,515 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:44,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:34:44,518 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:44,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:44,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:34:44,522 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:44,553 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-05 04:34:44,553 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:34:44,554 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:34:44,554 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-05 04:34:44,582 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:44,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142261348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:44,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:44,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2021-06-05 04:34:44,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080620049] [2021-06-05 04:34:44,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:34:44,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:44,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:34:44,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:34:44,594 INFO L87 Difference]: Start difference. First operand 2181 states and 6300 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:44,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:44,986 INFO L93 Difference]: Finished difference Result 2210 states and 6353 transitions. [2021-06-05 04:34:44,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:34:44,986 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:34:44,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:44,989 INFO L225 Difference]: With dead ends: 2210 [2021-06-05 04:34:44,989 INFO L226 Difference]: Without dead ends: 2202 [2021-06-05 04:34:44,989 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 374.7ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:34:44,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2202 states. [2021-06-05 04:34:45,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2202 to 2179. [2021-06-05 04:34:45,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2179 states, 2178 states have (on average 2.8898071625344355) internal successors, (6294), 2178 states have internal predecessors, (6294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:45,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2179 states to 2179 states and 6294 transitions. [2021-06-05 04:34:45,012 INFO L78 Accepts]: Start accepts. Automaton has 2179 states and 6294 transitions. Word has length 19 [2021-06-05 04:34:45,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:45,013 INFO L482 AbstractCegarLoop]: Abstraction has 2179 states and 6294 transitions. [2021-06-05 04:34:45,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:45,013 INFO L276 IsEmpty]: Start isEmpty. Operand 2179 states and 6294 transitions. [2021-06-05 04:34:45,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:34:45,015 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:45,015 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:45,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3920,482 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:45,215 INFO L430 AbstractCegarLoop]: === Iteration 492 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:45,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:45,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1081234236, now seen corresponding path program 478 times [2021-06-05 04:34:45,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:45,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851250104] [2021-06-05 04:34:45,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:45,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:45,310 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:45,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:45,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851250104] [2021-06-05 04:34:45,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851250104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:45,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618147526] [2021-06-05 04:34:45,311 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:45,339 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:34:45,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:45,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:34:45,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:45,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:45,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:45,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:34:45,479 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:45,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:45,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:45,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:34:45,483 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:45,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:45,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:45,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:34:45,486 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:45,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:45,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:34:45,489 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:45,524 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:34:45,524 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:34:45,525 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:34:45,525 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:34:45,581 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:45,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618147526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:45,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:45,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-06-05 04:34:45,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55845169] [2021-06-05 04:34:45,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:34:45,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:45,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:34:45,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:34:45,582 INFO L87 Difference]: Start difference. First operand 2179 states and 6294 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:46,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:46,164 INFO L93 Difference]: Finished difference Result 2347 states and 6623 transitions. [2021-06-05 04:34:46,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:34:46,164 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:34:46,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:46,166 INFO L225 Difference]: With dead ends: 2347 [2021-06-05 04:34:46,166 INFO L226 Difference]: Without dead ends: 2344 [2021-06-05 04:34:46,167 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 456.3ms TimeCoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:34:46,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2344 states. [2021-06-05 04:34:46,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2344 to 2198. [2021-06-05 04:34:46,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2198 states, 2197 states have (on average 2.8939462903959945) internal successors, (6358), 2197 states have internal predecessors, (6358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:46,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2198 states to 2198 states and 6358 transitions. [2021-06-05 04:34:46,197 INFO L78 Accepts]: Start accepts. Automaton has 2198 states and 6358 transitions. Word has length 19 [2021-06-05 04:34:46,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:46,197 INFO L482 AbstractCegarLoop]: Abstraction has 2198 states and 6358 transitions. [2021-06-05 04:34:46,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:46,198 INFO L276 IsEmpty]: Start isEmpty. Operand 2198 states and 6358 transitions. [2021-06-05 04:34:46,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:34:46,199 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:46,200 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:46,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3927,483 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:46,400 INFO L430 AbstractCegarLoop]: === Iteration 493 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:46,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:46,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1882850464, now seen corresponding path program 479 times [2021-06-05 04:34:46,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:46,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583601934] [2021-06-05 04:34:46,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:46,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:46,492 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:46,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:46,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583601934] [2021-06-05 04:34:46,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583601934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:46,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291689672] [2021-06-05 04:34:46,492 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:46,522 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:34:46,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:46,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:34:46,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:46,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:46,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:46,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:34:46,660 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:46,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:46,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:46,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:34:46,663 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:46,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:46,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:46,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:34:46,667 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:46,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:46,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:34:46,670 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:46,705 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:34:46,705 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:34:46,706 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:34:46,706 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:34:46,781 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:46,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291689672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:46,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:46,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-06-05 04:34:46,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879702161] [2021-06-05 04:34:46,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:34:46,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:46,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:34:46,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:34:46,781 INFO L87 Difference]: Start difference. First operand 2198 states and 6358 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:47,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:47,400 INFO L93 Difference]: Finished difference Result 2282 states and 6504 transitions. [2021-06-05 04:34:47,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 04:34:47,400 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:34:47,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:47,403 INFO L225 Difference]: With dead ends: 2282 [2021-06-05 04:34:47,403 INFO L226 Difference]: Without dead ends: 2274 [2021-06-05 04:34:47,403 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 511.8ms TimeCoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:34:47,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2274 states. [2021-06-05 04:34:47,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2274 to 2208. [2021-06-05 04:34:47,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2208 states, 2207 states have (on average 2.8885364748527413) internal successors, (6375), 2207 states have internal predecessors, (6375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:47,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2208 states to 2208 states and 6375 transitions. [2021-06-05 04:34:47,425 INFO L78 Accepts]: Start accepts. Automaton has 2208 states and 6375 transitions. Word has length 19 [2021-06-05 04:34:47,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:47,425 INFO L482 AbstractCegarLoop]: Abstraction has 2208 states and 6375 transitions. [2021-06-05 04:34:47,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:47,425 INFO L276 IsEmpty]: Start isEmpty. Operand 2208 states and 6375 transitions. [2021-06-05 04:34:47,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:34:47,427 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:47,427 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:47,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3931,484 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:47,627 INFO L430 AbstractCegarLoop]: === Iteration 494 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:47,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:47,628 INFO L82 PathProgramCache]: Analyzing trace with hash -693773126, now seen corresponding path program 480 times [2021-06-05 04:34:47,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:47,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51911784] [2021-06-05 04:34:47,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:47,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:47,723 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:47,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:47,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51911784] [2021-06-05 04:34:47,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51911784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:47,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007516031] [2021-06-05 04:34:47,723 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:47,753 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:34:47,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:47,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:34:47,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:47,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:47,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:47,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:34:47,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:47,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:47,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:47,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:34:47,910 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:47,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:47,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:47,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:34:47,913 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:47,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:47,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:34:47,916 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:47,951 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:34:47,951 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:34:47,952 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:34:47,952 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:34:48,005 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:48,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007516031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:48,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:48,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-06-05 04:34:48,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666081432] [2021-06-05 04:34:48,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:34:48,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:48,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:34:48,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:34:48,006 INFO L87 Difference]: Start difference. First operand 2208 states and 6375 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:48,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:48,559 INFO L93 Difference]: Finished difference Result 2365 states and 6681 transitions. [2021-06-05 04:34:48,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:34:48,560 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:34:48,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:48,562 INFO L225 Difference]: With dead ends: 2365 [2021-06-05 04:34:48,562 INFO L226 Difference]: Without dead ends: 2365 [2021-06-05 04:34:48,562 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 519.7ms TimeCoverageRelationStatistics Valid=138, Invalid=918, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:34:48,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2365 states. [2021-06-05 04:34:48,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2365 to 2193. [2021-06-05 04:34:48,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2193 states, 2192 states have (on average 2.883211678832117) internal successors, (6320), 2192 states have internal predecessors, (6320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:48,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2193 states to 2193 states and 6320 transitions. [2021-06-05 04:34:48,584 INFO L78 Accepts]: Start accepts. Automaton has 2193 states and 6320 transitions. Word has length 19 [2021-06-05 04:34:48,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:48,584 INFO L482 AbstractCegarLoop]: Abstraction has 2193 states and 6320 transitions. [2021-06-05 04:34:48,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:48,584 INFO L276 IsEmpty]: Start isEmpty. Operand 2193 states and 6320 transitions. [2021-06-05 04:34:48,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:34:48,586 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:48,586 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:48,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3936,485 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:48,786 INFO L430 AbstractCegarLoop]: === Iteration 495 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:48,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:48,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1890580862, now seen corresponding path program 481 times [2021-06-05 04:34:48,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:48,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703211031] [2021-06-05 04:34:48,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:48,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:48,874 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:48,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:48,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703211031] [2021-06-05 04:34:48,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703211031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:48,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128770800] [2021-06-05 04:34:48,874 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:48,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:48,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:34:48,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:49,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:49,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:49,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:34:49,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:49,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:49,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:34:49,071 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:49,094 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:34:49,094 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:34:49,095 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:34:49,095 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:34:49,117 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:49,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128770800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:49,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:49,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-06-05 04:34:49,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100523957] [2021-06-05 04:34:49,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:34:49,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:49,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:34:49,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:34:49,117 INFO L87 Difference]: Start difference. First operand 2193 states and 6320 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:49,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:49,687 INFO L93 Difference]: Finished difference Result 2384 states and 6720 transitions. [2021-06-05 04:34:49,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 04:34:49,687 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:34:49,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:49,689 INFO L225 Difference]: With dead ends: 2384 [2021-06-05 04:34:49,689 INFO L226 Difference]: Without dead ends: 2384 [2021-06-05 04:34:49,690 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 513.4ms TimeCoverageRelationStatistics Valid=142, Invalid=1048, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:34:49,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2384 states. [2021-06-05 04:34:49,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2384 to 2185. [2021-06-05 04:34:49,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2185 states, 2184 states have (on average 2.880952380952381) internal successors, (6292), 2184 states have internal predecessors, (6292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:49,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2185 states to 2185 states and 6292 transitions. [2021-06-05 04:34:49,710 INFO L78 Accepts]: Start accepts. Automaton has 2185 states and 6292 transitions. Word has length 19 [2021-06-05 04:34:49,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:49,710 INFO L482 AbstractCegarLoop]: Abstraction has 2185 states and 6292 transitions. [2021-06-05 04:34:49,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:49,710 INFO L276 IsEmpty]: Start isEmpty. Operand 2185 states and 6292 transitions. [2021-06-05 04:34:49,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:34:49,712 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:49,712 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:49,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3940,486 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:49,913 INFO L430 AbstractCegarLoop]: === Iteration 496 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:49,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:49,913 INFO L82 PathProgramCache]: Analyzing trace with hash 401175866, now seen corresponding path program 482 times [2021-06-05 04:34:49,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:49,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177200923] [2021-06-05 04:34:49,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:49,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:49,993 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:49,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:49,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177200923] [2021-06-05 04:34:49,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177200923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:49,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788694470] [2021-06-05 04:34:49,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:50,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:34:50,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:50,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:34:50,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:50,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:50,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:50,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:34:50,186 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:50,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:50,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:34:50,189 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:50,212 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:34:50,213 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:34:50,213 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:34:50,213 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:34:50,236 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:50,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788694470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:50,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:50,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-06-05 04:34:50,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767722939] [2021-06-05 04:34:50,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:34:50,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:50,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:34:50,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:34:50,237 INFO L87 Difference]: Start difference. First operand 2185 states and 6292 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:50,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:50,538 INFO L93 Difference]: Finished difference Result 2349 states and 6659 transitions. [2021-06-05 04:34:50,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:34:50,538 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:34:50,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:50,540 INFO L225 Difference]: With dead ends: 2349 [2021-06-05 04:34:50,540 INFO L226 Difference]: Without dead ends: 2349 [2021-06-05 04:34:50,540 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 229.7ms TimeCoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:34:50,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2349 states. [2021-06-05 04:34:50,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2349 to 2173. [2021-06-05 04:34:50,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2173 states, 2172 states have (on average 2.882136279926335) internal successors, (6260), 2172 states have internal predecessors, (6260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:50,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2173 states to 2173 states and 6260 transitions. [2021-06-05 04:34:50,561 INFO L78 Accepts]: Start accepts. Automaton has 2173 states and 6260 transitions. Word has length 19 [2021-06-05 04:34:50,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:50,561 INFO L482 AbstractCegarLoop]: Abstraction has 2173 states and 6260 transitions. [2021-06-05 04:34:50,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:50,562 INFO L276 IsEmpty]: Start isEmpty. Operand 2173 states and 6260 transitions. [2021-06-05 04:34:50,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:34:50,563 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:50,563 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:50,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3943,487 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:50,764 INFO L430 AbstractCegarLoop]: === Iteration 497 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:50,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:50,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1275013240, now seen corresponding path program 483 times [2021-06-05 04:34:50,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:50,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939525220] [2021-06-05 04:34:50,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:50,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:50,880 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:50,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:50,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939525220] [2021-06-05 04:34:50,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939525220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:50,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571088] [2021-06-05 04:34:50,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:50,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:34:50,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:50,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:34:50,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:51,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:51,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:51,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:34:51,074 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:51,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:51,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:51,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:34:51,078 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:51,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:51,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:51,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:34:51,081 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:51,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:51,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:34:51,084 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:51,119 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:34:51,119 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:34:51,120 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:34:51,120 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:34:51,175 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:51,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:51,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:51,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-05 04:34:51,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171851709] [2021-06-05 04:34:51,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:34:51,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:51,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:34:51,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:34:51,176 INFO L87 Difference]: Start difference. First operand 2173 states and 6260 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:51,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:51,604 INFO L93 Difference]: Finished difference Result 2397 states and 6740 transitions. [2021-06-05 04:34:51,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:34:51,605 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:34:51,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:51,607 INFO L225 Difference]: With dead ends: 2397 [2021-06-05 04:34:51,607 INFO L226 Difference]: Without dead ends: 2396 [2021-06-05 04:34:51,607 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 433.9ms TimeCoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:34:51,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2396 states. [2021-06-05 04:34:51,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2396 to 2189. [2021-06-05 04:34:51,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2189 states, 2188 states have (on average 2.882998171846435) internal successors, (6308), 2188 states have internal predecessors, (6308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:51,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2189 states to 2189 states and 6308 transitions. [2021-06-05 04:34:51,628 INFO L78 Accepts]: Start accepts. Automaton has 2189 states and 6308 transitions. Word has length 19 [2021-06-05 04:34:51,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:51,628 INFO L482 AbstractCegarLoop]: Abstraction has 2189 states and 6308 transitions. [2021-06-05 04:34:51,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:51,628 INFO L276 IsEmpty]: Start isEmpty. Operand 2189 states and 6308 transitions. [2021-06-05 04:34:51,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:34:51,630 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:51,630 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:51,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 488 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3946 [2021-06-05 04:34:51,830 INFO L430 AbstractCegarLoop]: === Iteration 498 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:51,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:51,830 INFO L82 PathProgramCache]: Analyzing trace with hash 2076629468, now seen corresponding path program 484 times [2021-06-05 04:34:51,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:51,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494682571] [2021-06-05 04:34:51,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:51,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:51,939 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:51,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:51,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494682571] [2021-06-05 04:34:51,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494682571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:51,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191106140] [2021-06-05 04:34:51,939 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:51,967 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:34:51,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:51,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:34:51,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:52,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:52,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:52,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:34:52,120 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:52,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:52,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:52,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:34:52,124 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:52,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:52,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:52,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:34:52,127 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:52,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:52,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:34:52,130 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:52,165 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:34:52,165 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:34:52,166 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:34:52,166 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:34:52,241 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:52,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191106140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:52,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:52,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-05 04:34:52,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019459745] [2021-06-05 04:34:52,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:34:52,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:52,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:34:52,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:34:52,242 INFO L87 Difference]: Start difference. First operand 2189 states and 6308 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:53,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:53,386 INFO L93 Difference]: Finished difference Result 2373 states and 6622 transitions. [2021-06-05 04:34:53,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 04:34:53,386 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:34:53,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:53,389 INFO L225 Difference]: With dead ends: 2373 [2021-06-05 04:34:53,389 INFO L226 Difference]: Without dead ends: 2361 [2021-06-05 04:34:53,389 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 1000.9ms TimeCoverageRelationStatistics Valid=231, Invalid=1931, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 04:34:53,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2361 states. [2021-06-05 04:34:53,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2361 to 2185. [2021-06-05 04:34:53,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2185 states, 2184 states have (on average 2.874084249084249) internal successors, (6277), 2184 states have internal predecessors, (6277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:53,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2185 states to 2185 states and 6277 transitions. [2021-06-05 04:34:53,410 INFO L78 Accepts]: Start accepts. Automaton has 2185 states and 6277 transitions. Word has length 19 [2021-06-05 04:34:53,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:53,410 INFO L482 AbstractCegarLoop]: Abstraction has 2185 states and 6277 transitions. [2021-06-05 04:34:53,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:53,410 INFO L276 IsEmpty]: Start isEmpty. Operand 2185 states and 6277 transitions. [2021-06-05 04:34:53,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:34:53,412 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:53,412 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:53,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3950,489 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:53,613 INFO L430 AbstractCegarLoop]: === Iteration 499 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:53,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:53,613 INFO L82 PathProgramCache]: Analyzing trace with hash -499994122, now seen corresponding path program 485 times [2021-06-05 04:34:53,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:53,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749691583] [2021-06-05 04:34:53,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:53,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:53,722 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:53,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:53,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749691583] [2021-06-05 04:34:53,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749691583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:53,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600793847] [2021-06-05 04:34:53,722 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:53,752 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:34:53,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:53,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:34:53,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:53,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:53,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:53,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:34:53,904 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:53,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:53,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:53,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:34:53,908 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:53,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:53,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:53,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:34:53,911 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:53,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:53,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:34:53,914 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:53,949 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:34:53,949 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:34:53,949 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:34:53,949 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:34:54,003 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:54,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600793847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:54,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:54,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-05 04:34:54,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464575340] [2021-06-05 04:34:54,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:34:54,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:54,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:34:54,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:34:54,004 INFO L87 Difference]: Start difference. First operand 2185 states and 6277 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:54,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:54,873 INFO L93 Difference]: Finished difference Result 2357 states and 6572 transitions. [2021-06-05 04:34:54,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 04:34:54,874 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:34:54,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:54,876 INFO L225 Difference]: With dead ends: 2357 [2021-06-05 04:34:54,876 INFO L226 Difference]: Without dead ends: 2353 [2021-06-05 04:34:54,876 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 753.3ms TimeCoverageRelationStatistics Valid=187, Invalid=1295, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 04:34:54,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2353 states. [2021-06-05 04:34:54,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2353 to 2153. [2021-06-05 04:34:54,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2153 states, 2152 states have (on average 2.8615241635687734) internal successors, (6158), 2152 states have internal predecessors, (6158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:54,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2153 states to 2153 states and 6158 transitions. [2021-06-05 04:34:54,897 INFO L78 Accepts]: Start accepts. Automaton has 2153 states and 6158 transitions. Word has length 19 [2021-06-05 04:34:54,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:54,897 INFO L482 AbstractCegarLoop]: Abstraction has 2153 states and 6158 transitions. [2021-06-05 04:34:54,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:54,897 INFO L276 IsEmpty]: Start isEmpty. Operand 2153 states and 6158 transitions. [2021-06-05 04:34:54,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:34:54,899 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:54,899 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:55,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 490 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3955 [2021-06-05 04:34:55,099 INFO L430 AbstractCegarLoop]: === Iteration 500 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:55,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:55,099 INFO L82 PathProgramCache]: Analyzing trace with hash 2084359866, now seen corresponding path program 486 times [2021-06-05 04:34:55,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:55,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665072746] [2021-06-05 04:34:55,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:55,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:55,204 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:55,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:55,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665072746] [2021-06-05 04:34:55,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665072746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:55,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080519795] [2021-06-05 04:34:55,204 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:55,234 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:34:55,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:55,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:34:55,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:55,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:55,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:55,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:34:55,415 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:55,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:55,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:34:55,418 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:55,441 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:34:55,441 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:34:55,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:34:55,442 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:34:55,464 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:55,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080519795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:55,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:55,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-05 04:34:55,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042179499] [2021-06-05 04:34:55,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:34:55,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:55,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:34:55,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:34:55,465 INFO L87 Difference]: Start difference. First operand 2153 states and 6158 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:56,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:56,331 INFO L93 Difference]: Finished difference Result 2535 states and 6885 transitions. [2021-06-05 04:34:56,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 04:34:56,331 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:34:56,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:56,333 INFO L225 Difference]: With dead ends: 2535 [2021-06-05 04:34:56,333 INFO L226 Difference]: Without dead ends: 2535 [2021-06-05 04:34:56,334 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 683.8ms TimeCoverageRelationStatistics Valid=197, Invalid=1609, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 04:34:56,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2535 states. [2021-06-05 04:34:56,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2535 to 2099. [2021-06-05 04:34:56,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2099 states, 2098 states have (on average 2.8512869399428027) internal successors, (5982), 2098 states have internal predecessors, (5982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:56,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2099 states to 2099 states and 5982 transitions. [2021-06-05 04:34:56,355 INFO L78 Accepts]: Start accepts. Automaton has 2099 states and 5982 transitions. Word has length 19 [2021-06-05 04:34:56,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:56,355 INFO L482 AbstractCegarLoop]: Abstraction has 2099 states and 5982 transitions. [2021-06-05 04:34:56,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:56,355 INFO L276 IsEmpty]: Start isEmpty. Operand 2099 states and 5982 transitions. [2021-06-05 04:34:56,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:34:56,357 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:56,357 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:56,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3959,491 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:56,557 INFO L430 AbstractCegarLoop]: === Iteration 501 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:56,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:56,558 INFO L82 PathProgramCache]: Analyzing trace with hash 594954870, now seen corresponding path program 487 times [2021-06-05 04:34:56,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:56,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972852674] [2021-06-05 04:34:56,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:56,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:56,653 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:56,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:56,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972852674] [2021-06-05 04:34:56,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972852674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:56,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301238990] [2021-06-05 04:34:56,653 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:56,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:56,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:34:56,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:56,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:56,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:56,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:34:56,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:56,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:56,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:34:56,868 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:56,891 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:34:56,891 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:34:56,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:34:56,892 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:34:56,915 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:56,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301238990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:56,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:56,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-05 04:34:56,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548983913] [2021-06-05 04:34:56,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:34:56,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:56,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:34:56,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:34:56,916 INFO L87 Difference]: Start difference. First operand 2099 states and 5982 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:58,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:58,039 INFO L93 Difference]: Finished difference Result 2411 states and 6591 transitions. [2021-06-05 04:34:58,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 04:34:58,039 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:34:58,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:58,042 INFO L225 Difference]: With dead ends: 2411 [2021-06-05 04:34:58,042 INFO L226 Difference]: Without dead ends: 2411 [2021-06-05 04:34:58,042 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 954.2ms TimeCoverageRelationStatistics Valid=289, Invalid=2261, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 04:34:58,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2411 states. [2021-06-05 04:34:58,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2411 to 2081. [2021-06-05 04:34:58,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2081 states, 2080 states have (on average 2.84375) internal successors, (5915), 2080 states have internal predecessors, (5915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:58,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2081 states to 2081 states and 5915 transitions. [2021-06-05 04:34:58,063 INFO L78 Accepts]: Start accepts. Automaton has 2081 states and 5915 transitions. Word has length 19 [2021-06-05 04:34:58,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:58,063 INFO L482 AbstractCegarLoop]: Abstraction has 2081 states and 5915 transitions. [2021-06-05 04:34:58,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:58,063 INFO L276 IsEmpty]: Start isEmpty. Operand 2081 states and 5915 transitions. [2021-06-05 04:34:58,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:34:58,065 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:58,065 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:58,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3962,492 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:58,265 INFO L430 AbstractCegarLoop]: === Iteration 502 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:58,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:58,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1668040250, now seen corresponding path program 488 times [2021-06-05 04:34:58,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:58,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330899318] [2021-06-05 04:34:58,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:58,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:58,362 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:58,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:58,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330899318] [2021-06-05 04:34:58,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330899318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:58,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672199690] [2021-06-05 04:34:58,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:58,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:34:58,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:58,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:34:58,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:58,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:58,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:58,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:34:58,573 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:58,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:58,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:34:58,576 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:58,599 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:34:58,599 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:34:58,600 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:34:58,600 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:34:58,624 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:58,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672199690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:58,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:58,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-05 04:34:58,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460672172] [2021-06-05 04:34:58,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:34:58,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:58,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:34:58,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:34:58,624 INFO L87 Difference]: Start difference. First operand 2081 states and 5915 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:59,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:34:59,096 INFO L93 Difference]: Finished difference Result 2196 states and 6134 transitions. [2021-06-05 04:34:59,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:34:59,097 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:34:59,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:34:59,099 INFO L225 Difference]: With dead ends: 2196 [2021-06-05 04:34:59,099 INFO L226 Difference]: Without dead ends: 2196 [2021-06-05 04:34:59,099 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 249.9ms TimeCoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:34:59,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2196 states. [2021-06-05 04:34:59,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2196 to 2060. [2021-06-05 04:34:59,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2060 states, 2059 states have (on average 2.8411850412821757) internal successors, (5850), 2059 states have internal predecessors, (5850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:59,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2060 states to 2060 states and 5850 transitions. [2021-06-05 04:34:59,119 INFO L78 Accepts]: Start accepts. Automaton has 2060 states and 5850 transitions. Word has length 19 [2021-06-05 04:34:59,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:34:59,119 INFO L482 AbstractCegarLoop]: Abstraction has 2060 states and 5850 transitions. [2021-06-05 04:34:59,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:34:59,119 INFO L276 IsEmpty]: Start isEmpty. Operand 2060 states and 5850 transitions. [2021-06-05 04:34:59,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:34:59,121 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:34:59,121 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:34:59,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3965,493 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:59,321 INFO L430 AbstractCegarLoop]: === Iteration 503 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:34:59,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:34:59,321 INFO L82 PathProgramCache]: Analyzing trace with hash -143150182, now seen corresponding path program 489 times [2021-06-05 04:34:59,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:34:59,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349454957] [2021-06-05 04:34:59,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:34:59,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:34:59,426 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:34:59,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:34:59,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349454957] [2021-06-05 04:34:59,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349454957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:59,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522354434] [2021-06-05 04:34:59,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:34:59,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:34:59,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:34:59,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:34:59,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:34:59,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:59,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:59,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:34:59,604 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:59,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:59,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:59,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:34:59,607 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:59,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:59,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:59,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:34:59,611 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:59,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:34:59,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:34:59,614 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:34:59,648 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:34:59,649 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:34:59,649 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:34:59,649 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:34:59,715 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:34:59,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522354434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:34:59,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:34:59,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-05 04:34:59,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68052539] [2021-06-05 04:34:59,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:34:59,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:34:59,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:34:59,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:34:59,716 INFO L87 Difference]: Start difference. First operand 2060 states and 5850 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:00,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:00,168 INFO L93 Difference]: Finished difference Result 2143 states and 6007 transitions. [2021-06-05 04:35:00,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:35:00,169 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:35:00,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:00,171 INFO L225 Difference]: With dead ends: 2143 [2021-06-05 04:35:00,171 INFO L226 Difference]: Without dead ends: 2139 [2021-06-05 04:35:00,171 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 410.0ms TimeCoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:35:00,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2139 states. [2021-06-05 04:35:00,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2139 to 2068. [2021-06-05 04:35:00,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2068 states, 2067 states have (on average 2.840832123850992) internal successors, (5872), 2067 states have internal predecessors, (5872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:00,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2068 states to 2068 states and 5872 transitions. [2021-06-05 04:35:00,190 INFO L78 Accepts]: Start accepts. Automaton has 2068 states and 5872 transitions. Word has length 19 [2021-06-05 04:35:00,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:00,190 INFO L482 AbstractCegarLoop]: Abstraction has 2068 states and 5872 transitions. [2021-06-05 04:35:00,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:00,190 INFO L276 IsEmpty]: Start isEmpty. Operand 2068 states and 5872 transitions. [2021-06-05 04:35:00,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:00,192 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:00,192 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:00,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 494 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3968 [2021-06-05 04:35:00,392 INFO L430 AbstractCegarLoop]: === Iteration 504 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:00,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:00,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1585897152, now seen corresponding path program 490 times [2021-06-05 04:35:00,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:00,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129603465] [2021-06-05 04:35:00,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:00,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:00,492 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:35:00,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:00,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129603465] [2021-06-05 04:35:00,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129603465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:00,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195114709] [2021-06-05 04:35:00,492 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:00,531 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:35:00,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:00,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:35:00,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:00,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:35:00,729 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:00,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:35:00,732 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:00,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:00,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:00,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:35:00,736 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:00,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:35:00,751 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:00,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:35:00,754 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:00,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:00,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:35:00,757 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:00,788 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-05 04:35:00,788 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:35:00,789 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:35:00,789 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-05 04:35:00,818 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:00,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195114709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:00,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:00,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-05 04:35:00,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051372747] [2021-06-05 04:35:00,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:35:00,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:00,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:35:00,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:35:00,818 INFO L87 Difference]: Start difference. First operand 2068 states and 5872 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:01,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:01,238 INFO L93 Difference]: Finished difference Result 2118 states and 5951 transitions. [2021-06-05 04:35:01,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:35:01,238 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:35:01,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:01,240 INFO L225 Difference]: With dead ends: 2118 [2021-06-05 04:35:01,240 INFO L226 Difference]: Without dead ends: 2110 [2021-06-05 04:35:01,240 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 403.8ms TimeCoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:35:01,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2110 states. [2021-06-05 04:35:01,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2110 to 2067. [2021-06-05 04:35:01,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2067 states, 2066 states have (on average 2.839303000968054) internal successors, (5866), 2066 states have internal predecessors, (5866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:01,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2067 states to 2067 states and 5866 transitions. [2021-06-05 04:35:01,259 INFO L78 Accepts]: Start accepts. Automaton has 2067 states and 5866 transitions. Word has length 19 [2021-06-05 04:35:01,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:01,259 INFO L482 AbstractCegarLoop]: Abstraction has 2067 states and 5866 transitions. [2021-06-05 04:35:01,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:01,259 INFO L276 IsEmpty]: Start isEmpty. Operand 2067 states and 5866 transitions. [2021-06-05 04:35:01,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:01,261 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:01,261 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:01,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 495 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3974 [2021-06-05 04:35:01,461 INFO L430 AbstractCegarLoop]: === Iteration 505 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:01,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:01,461 INFO L82 PathProgramCache]: Analyzing trace with hash -648210342, now seen corresponding path program 491 times [2021-06-05 04:35:01,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:01,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309569907] [2021-06-05 04:35:01,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:01,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:01,559 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:35:01,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:01,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309569907] [2021-06-05 04:35:01,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309569907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:01,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089165341] [2021-06-05 04:35:01,560 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:01,589 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:35:01,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:01,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:35:01,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:01,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:35:01,811 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:01,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:35:01,814 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:01,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:01,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:01,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:35:01,818 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:01,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:35:01,822 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:01,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:35:01,825 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:01,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:01,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:35:01,828 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:01,860 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-05 04:35:01,860 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:35:01,861 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:35:01,861 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-05 04:35:01,892 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:01,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089165341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:01,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:01,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-05 04:35:01,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117766063] [2021-06-05 04:35:01,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:35:01,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:01,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:35:01,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:35:01,893 INFO L87 Difference]: Start difference. First operand 2067 states and 5866 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:02,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:02,403 INFO L93 Difference]: Finished difference Result 2121 states and 5951 transitions. [2021-06-05 04:35:02,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:35:02,403 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:35:02,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:02,405 INFO L225 Difference]: With dead ends: 2121 [2021-06-05 04:35:02,405 INFO L226 Difference]: Without dead ends: 2109 [2021-06-05 04:35:02,406 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 516.7ms TimeCoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:35:02,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2109 states. [2021-06-05 04:35:02,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2109 to 2066. [2021-06-05 04:35:02,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2066 states, 2065 states have (on average 2.8372881355932202) internal successors, (5859), 2065 states have internal predecessors, (5859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:02,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2066 states to 2066 states and 5859 transitions. [2021-06-05 04:35:02,426 INFO L78 Accepts]: Start accepts. Automaton has 2066 states and 5859 transitions. Word has length 19 [2021-06-05 04:35:02,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:02,426 INFO L482 AbstractCegarLoop]: Abstraction has 2066 states and 5859 transitions. [2021-06-05 04:35:02,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:02,426 INFO L276 IsEmpty]: Start isEmpty. Operand 2066 states and 5859 transitions. [2021-06-05 04:35:02,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:02,428 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:02,428 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:02,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3981,496 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:02,629 INFO L430 AbstractCegarLoop]: === Iteration 506 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:02,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:02,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1186065920, now seen corresponding path program 492 times [2021-06-05 04:35:02,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:02,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680531083] [2021-06-05 04:35:02,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:02,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:02,723 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:35:02,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:02,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680531083] [2021-06-05 04:35:02,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680531083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:02,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296055571] [2021-06-05 04:35:02,724 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:02,753 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:35:02,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:02,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:35:02,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:02,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:35:02,967 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:02,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:35:02,970 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:02,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:02,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:02,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:35:02,974 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:02,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:35:02,977 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:02,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:35:02,980 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:02,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:02,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:35:02,983 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:03,015 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-05 04:35:03,015 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:35:03,016 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:35:03,016 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-05 04:35:03,048 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:03,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296055571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:03,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:03,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-05 04:35:03,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232310897] [2021-06-05 04:35:03,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:35:03,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:03,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:35:03,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:35:03,049 INFO L87 Difference]: Start difference. First operand 2066 states and 5859 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:03,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:03,460 INFO L93 Difference]: Finished difference Result 2106 states and 5923 transitions. [2021-06-05 04:35:03,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:35:03,461 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:35:03,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:03,463 INFO L225 Difference]: With dead ends: 2106 [2021-06-05 04:35:03,463 INFO L226 Difference]: Without dead ends: 2090 [2021-06-05 04:35:03,463 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 490.0ms TimeCoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:35:03,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2021-06-05 04:35:03,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 2066. [2021-06-05 04:35:03,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2066 states, 2065 states have (on average 2.834866828087167) internal successors, (5854), 2065 states have internal predecessors, (5854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:03,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2066 states to 2066 states and 5854 transitions. [2021-06-05 04:35:03,483 INFO L78 Accepts]: Start accepts. Automaton has 2066 states and 5854 transitions. Word has length 19 [2021-06-05 04:35:03,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:03,483 INFO L482 AbstractCegarLoop]: Abstraction has 2066 states and 5854 transitions. [2021-06-05 04:35:03,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:03,483 INFO L276 IsEmpty]: Start isEmpty. Operand 2066 states and 5854 transitions. [2021-06-05 04:35:03,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:03,485 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:03,485 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:03,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 497 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3988 [2021-06-05 04:35:03,686 INFO L430 AbstractCegarLoop]: === Iteration 507 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:03,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:03,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1307772228, now seen corresponding path program 493 times [2021-06-05 04:35:03,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:03,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340347251] [2021-06-05 04:35:03,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:03,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:03,840 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:03,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:03,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340347251] [2021-06-05 04:35:03,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340347251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:03,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527505527] [2021-06-05 04:35:03,840 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:03,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:03,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:35:03,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:04,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:04,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:04,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:35:04,041 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:04,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:04,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:04,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:35:04,045 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:04,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:04,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:04,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:35:04,048 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:04,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:04,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:35:04,051 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:04,086 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:35:04,086 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:35:04,087 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:35:04,087 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:35:04,147 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:04,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527505527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:04,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:04,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 04:35:04,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649765822] [2021-06-05 04:35:04,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:35:04,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:04,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:35:04,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:35:04,148 INFO L87 Difference]: Start difference. First operand 2066 states and 5854 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:04,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:04,591 INFO L93 Difference]: Finished difference Result 2263 states and 6214 transitions. [2021-06-05 04:35:04,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:35:04,592 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:35:04,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:04,594 INFO L225 Difference]: With dead ends: 2263 [2021-06-05 04:35:04,594 INFO L226 Difference]: Without dead ends: 2263 [2021-06-05 04:35:04,594 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 497.3ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:35:04,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2263 states. [2021-06-05 04:35:04,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2263 to 2094. [2021-06-05 04:35:04,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2094 states, 2093 states have (on average 2.84089823220258) internal successors, (5946), 2093 states have internal predecessors, (5946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:04,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2094 states to 2094 states and 5946 transitions. [2021-06-05 04:35:04,614 INFO L78 Accepts]: Start accepts. Automaton has 2094 states and 5946 transitions. Word has length 19 [2021-06-05 04:35:04,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:04,614 INFO L482 AbstractCegarLoop]: Abstraction has 2094 states and 5946 transitions. [2021-06-05 04:35:04,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:04,614 INFO L276 IsEmpty]: Start isEmpty. Operand 2094 states and 5946 transitions. [2021-06-05 04:35:04,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:04,616 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:04,616 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:04,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3995,498 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:04,816 INFO L430 AbstractCegarLoop]: === Iteration 508 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:04,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:04,816 INFO L82 PathProgramCache]: Analyzing trace with hash -506156000, now seen corresponding path program 494 times [2021-06-05 04:35:04,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:04,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296285457] [2021-06-05 04:35:04,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:04,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:04,937 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:04,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:04,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296285457] [2021-06-05 04:35:04,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296285457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:04,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623692454] [2021-06-05 04:35:04,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:04,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:35:04,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:04,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:35:04,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:05,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:05,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:05,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:35:05,133 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:05,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:05,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:05,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:35:05,136 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:05,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:05,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:05,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:35:05,140 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:05,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:05,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:35:05,143 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:05,178 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:35:05,178 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:35:05,178 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:35:05,178 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:35:05,266 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:05,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623692454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:05,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:05,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 04:35:05,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814451200] [2021-06-05 04:35:05,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:35:05,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:05,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:35:05,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:35:05,267 INFO L87 Difference]: Start difference. First operand 2094 states and 5946 transitions. Second operand has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:06,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:06,324 INFO L93 Difference]: Finished difference Result 2277 states and 6275 transitions. [2021-06-05 04:35:06,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 04:35:06,331 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:35:06,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:06,334 INFO L225 Difference]: With dead ends: 2277 [2021-06-05 04:35:06,335 INFO L226 Difference]: Without dead ends: 2265 [2021-06-05 04:35:06,335 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 983.4ms TimeCoverageRelationStatistics Valid=212, Invalid=1858, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 04:35:06,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2265 states. [2021-06-05 04:35:06,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2265 to 2111. [2021-06-05 04:35:06,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2111 states, 2110 states have (on average 2.844075829383886) internal successors, (6001), 2110 states have internal predecessors, (6001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:06,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2111 states to 2111 states and 6001 transitions. [2021-06-05 04:35:06,362 INFO L78 Accepts]: Start accepts. Automaton has 2111 states and 6001 transitions. Word has length 19 [2021-06-05 04:35:06,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:06,362 INFO L482 AbstractCegarLoop]: Abstraction has 2111 states and 6001 transitions. [2021-06-05 04:35:06,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:06,362 INFO L276 IsEmpty]: Start isEmpty. Operand 2111 states and 6001 transitions. [2021-06-05 04:35:06,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:06,364 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:06,364 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:06,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 499 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3999 [2021-06-05 04:35:06,564 INFO L430 AbstractCegarLoop]: === Iteration 509 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:06,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:06,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1212187706, now seen corresponding path program 495 times [2021-06-05 04:35:06,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:06,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984242804] [2021-06-05 04:35:06,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:06,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:06,687 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:06,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:06,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984242804] [2021-06-05 04:35:06,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984242804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:06,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129516466] [2021-06-05 04:35:06,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:06,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:35:06,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:06,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:35:06,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:06,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:06,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:06,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:35:06,896 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:06,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:06,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:06,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:35:06,900 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:06,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:06,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:06,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:35:06,904 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:06,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:06,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:35:06,907 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:06,942 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:35:06,942 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:35:06,942 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:35:06,942 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:35:06,998 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:06,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129516466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:06,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:06,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 04:35:06,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078496201] [2021-06-05 04:35:06,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:35:06,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:06,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:35:06,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:35:06,999 INFO L87 Difference]: Start difference. First operand 2111 states and 6001 transitions. Second operand has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:07,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:07,696 INFO L93 Difference]: Finished difference Result 2246 states and 6234 transitions. [2021-06-05 04:35:07,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:35:07,696 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:35:07,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:07,699 INFO L225 Difference]: With dead ends: 2246 [2021-06-05 04:35:07,700 INFO L226 Difference]: Without dead ends: 2246 [2021-06-05 04:35:07,700 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 662.3ms TimeCoverageRelationStatistics Valid=141, Invalid=981, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 04:35:07,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2246 states. [2021-06-05 04:35:07,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2246 to 2106. [2021-06-05 04:35:07,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2106 states, 2105 states have (on average 2.841330166270784) internal successors, (5981), 2105 states have internal predecessors, (5981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:07,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2106 states to 2106 states and 5981 transitions. [2021-06-05 04:35:07,731 INFO L78 Accepts]: Start accepts. Automaton has 2106 states and 5981 transitions. Word has length 19 [2021-06-05 04:35:07,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:07,731 INFO L482 AbstractCegarLoop]: Abstraction has 2106 states and 5981 transitions. [2021-06-05 04:35:07,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:07,731 INFO L276 IsEmpty]: Start isEmpty. Operand 2106 states and 5981 transitions. [2021-06-05 04:35:07,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:07,734 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:07,734 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:07,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4004,500 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:07,949 INFO L430 AbstractCegarLoop]: === Iteration 510 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:07,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:07,949 INFO L82 PathProgramCache]: Analyzing trace with hash -498425602, now seen corresponding path program 496 times [2021-06-05 04:35:07,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:07,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674269278] [2021-06-05 04:35:07,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:07,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:08,094 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:08,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:08,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674269278] [2021-06-05 04:35:08,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674269278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:08,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552544561] [2021-06-05 04:35:08,095 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:08,132 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:35:08,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:08,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:35:08,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:08,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:08,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:08,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:35:08,339 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:08,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:08,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:35:08,342 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:08,365 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:35:08,366 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:35:08,366 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:35:08,366 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:35:08,390 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:08,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552544561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:08,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:08,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 04:35:08,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185919698] [2021-06-05 04:35:08,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:35:08,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:08,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:35:08,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:35:08,391 INFO L87 Difference]: Start difference. First operand 2106 states and 5981 transitions. Second operand has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:09,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:09,340 INFO L93 Difference]: Finished difference Result 2384 states and 6529 transitions. [2021-06-05 04:35:09,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 04:35:09,340 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:35:09,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:09,343 INFO L225 Difference]: With dead ends: 2384 [2021-06-05 04:35:09,343 INFO L226 Difference]: Without dead ends: 2384 [2021-06-05 04:35:09,343 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 795.0ms TimeCoverageRelationStatistics Valid=221, Invalid=1849, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 04:35:09,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2384 states. [2021-06-05 04:35:09,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2384 to 2130. [2021-06-05 04:35:09,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2130 states, 2129 states have (on average 2.8511038046031) internal successors, (6070), 2129 states have internal predecessors, (6070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:09,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2130 states to 2130 states and 6070 transitions. [2021-06-05 04:35:09,364 INFO L78 Accepts]: Start accepts. Automaton has 2130 states and 6070 transitions. Word has length 19 [2021-06-05 04:35:09,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:09,364 INFO L482 AbstractCegarLoop]: Abstraction has 2130 states and 6070 transitions. [2021-06-05 04:35:09,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:09,364 INFO L276 IsEmpty]: Start isEmpty. Operand 2130 states and 6070 transitions. [2021-06-05 04:35:09,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:09,366 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:09,366 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:09,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4008,501 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:09,567 INFO L430 AbstractCegarLoop]: === Iteration 511 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:09,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:09,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1987830598, now seen corresponding path program 497 times [2021-06-05 04:35:09,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:09,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342999359] [2021-06-05 04:35:09,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:09,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:09,675 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:09,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:09,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342999359] [2021-06-05 04:35:09,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342999359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:09,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175605472] [2021-06-05 04:35:09,675 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:09,705 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:35:09,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:09,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:35:09,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:09,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:09,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:09,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:35:09,901 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:09,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:09,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:35:09,904 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:09,927 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:35:09,928 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:35:09,928 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:35:09,928 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:35:09,952 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:09,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175605472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:09,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:09,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 04:35:09,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370865721] [2021-06-05 04:35:09,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:35:09,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:09,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:35:09,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:35:09,953 INFO L87 Difference]: Start difference. First operand 2130 states and 6070 transitions. Second operand has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:11,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:11,892 INFO L93 Difference]: Finished difference Result 2569 states and 6877 transitions. [2021-06-05 04:35:11,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 04:35:11,893 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:35:11,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:11,895 INFO L225 Difference]: With dead ends: 2569 [2021-06-05 04:35:11,895 INFO L226 Difference]: Without dead ends: 2569 [2021-06-05 04:35:11,895 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1607 ImplicationChecksByTransitivity, 1478.9ms TimeCoverageRelationStatistics Valid=483, Invalid=4629, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 04:35:11,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2569 states. [2021-06-05 04:35:11,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2569 to 2123. [2021-06-05 04:35:11,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2123 states, 2122 states have (on average 2.8482563619227146) internal successors, (6044), 2122 states have internal predecessors, (6044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:11,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2123 states to 2123 states and 6044 transitions. [2021-06-05 04:35:11,919 INFO L78 Accepts]: Start accepts. Automaton has 2123 states and 6044 transitions. Word has length 19 [2021-06-05 04:35:11,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:11,919 INFO L482 AbstractCegarLoop]: Abstraction has 2123 states and 6044 transitions. [2021-06-05 04:35:11,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:11,919 INFO L276 IsEmpty]: Start isEmpty. Operand 2123 states and 6044 transitions. [2021-06-05 04:35:11,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:11,921 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:11,921 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:12,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 502 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4011 [2021-06-05 04:35:12,122 INFO L430 AbstractCegarLoop]: === Iteration 512 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:12,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:12,122 INFO L82 PathProgramCache]: Analyzing trace with hash -914745218, now seen corresponding path program 498 times [2021-06-05 04:35:12,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:12,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154727829] [2021-06-05 04:35:12,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:12,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:12,233 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:12,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:12,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154727829] [2021-06-05 04:35:12,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154727829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:12,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205553969] [2021-06-05 04:35:12,233 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:12,262 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:35:12,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:12,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:35:12,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:12,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:12,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:12,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:35:12,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:12,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:12,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:35:12,461 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:12,484 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:35:12,484 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:35:12,485 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:35:12,485 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:35:12,509 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:12,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205553969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:12,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:12,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 04:35:12,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693395305] [2021-06-05 04:35:12,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:35:12,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:12,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:35:12,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:35:12,510 INFO L87 Difference]: Start difference. First operand 2123 states and 6044 transitions. Second operand has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:15,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:15,230 INFO L93 Difference]: Finished difference Result 2444 states and 6649 transitions. [2021-06-05 04:35:15,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-05 04:35:15,231 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:35:15,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:15,233 INFO L225 Difference]: With dead ends: 2444 [2021-06-05 04:35:15,233 INFO L226 Difference]: Without dead ends: 2444 [2021-06-05 04:35:15,233 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2471 ImplicationChecksByTransitivity, 2170.1ms TimeCoverageRelationStatistics Valid=761, Invalid=6895, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 04:35:15,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2444 states. [2021-06-05 04:35:15,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2444 to 2101. [2021-06-05 04:35:15,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2101 states, 2100 states have (on average 2.840952380952381) internal successors, (5966), 2100 states have internal predecessors, (5966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:15,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2101 states to 2101 states and 5966 transitions. [2021-06-05 04:35:15,254 INFO L78 Accepts]: Start accepts. Automaton has 2101 states and 5966 transitions. Word has length 19 [2021-06-05 04:35:15,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:15,254 INFO L482 AbstractCegarLoop]: Abstraction has 2101 states and 5966 transitions. [2021-06-05 04:35:15,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:15,254 INFO L276 IsEmpty]: Start isEmpty. Operand 2101 states and 5966 transitions. [2021-06-05 04:35:15,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:15,256 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:15,256 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:15,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4014,503 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:15,457 INFO L430 AbstractCegarLoop]: === Iteration 513 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:15,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:15,457 INFO L82 PathProgramCache]: Analyzing trace with hash -2008836806, now seen corresponding path program 499 times [2021-06-05 04:35:15,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:15,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786446012] [2021-06-05 04:35:15,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:15,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:15,569 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:15,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:15,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786446012] [2021-06-05 04:35:15,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786446012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:15,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535069180] [2021-06-05 04:35:15,569 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:15,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:15,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:35:15,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:15,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:15,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:15,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:35:15,795 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:15,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:15,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:35:15,798 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:15,822 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:35:15,822 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:35:15,823 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:35:15,823 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:35:15,848 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:15,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535069180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:15,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:15,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 04:35:15,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769703112] [2021-06-05 04:35:15,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:35:15,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:15,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:35:15,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:35:15,849 INFO L87 Difference]: Start difference. First operand 2101 states and 5966 transitions. Second operand has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:16,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:16,151 INFO L93 Difference]: Finished difference Result 2165 states and 6085 transitions. [2021-06-05 04:35:16,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:35:16,152 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:35:16,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:16,154 INFO L225 Difference]: With dead ends: 2165 [2021-06-05 04:35:16,154 INFO L226 Difference]: Without dead ends: 2165 [2021-06-05 04:35:16,154 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 269.7ms TimeCoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:35:16,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2165 states. [2021-06-05 04:35:16,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2165 to 2101. [2021-06-05 04:35:16,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2101 states, 2100 states have (on average 2.840952380952381) internal successors, (5966), 2100 states have internal predecessors, (5966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:16,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2101 states to 2101 states and 5966 transitions. [2021-06-05 04:35:16,173 INFO L78 Accepts]: Start accepts. Automaton has 2101 states and 5966 transitions. Word has length 19 [2021-06-05 04:35:16,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:16,173 INFO L482 AbstractCegarLoop]: Abstraction has 2101 states and 5966 transitions. [2021-06-05 04:35:16,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:16,173 INFO L276 IsEmpty]: Start isEmpty. Operand 2101 states and 5966 transitions. [2021-06-05 04:35:16,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:16,175 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:16,175 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:16,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4017,504 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:16,375 INFO L430 AbstractCegarLoop]: === Iteration 514 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:16,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:16,375 INFO L82 PathProgramCache]: Analyzing trace with hash 716334810, now seen corresponding path program 500 times [2021-06-05 04:35:16,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:16,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888207037] [2021-06-05 04:35:16,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:16,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:16,485 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:16,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:16,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888207037] [2021-06-05 04:35:16,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888207037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:16,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948403269] [2021-06-05 04:35:16,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:16,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:35:16,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:16,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:35:16,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:16,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:16,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:16,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:35:16,723 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:16,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:16,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:35:16,726 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:16,745 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-06-05 04:35:16,745 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:35:16,745 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:35:16,745 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-06-05 04:35:16,772 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:16,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948403269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:16,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:16,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 04:35:16,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065541405] [2021-06-05 04:35:16,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:35:16,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:16,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:35:16,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:35:16,773 INFO L87 Difference]: Start difference. First operand 2101 states and 5966 transitions. Second operand has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:17,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:17,127 INFO L93 Difference]: Finished difference Result 2318 states and 6445 transitions. [2021-06-05 04:35:17,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:35:17,127 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:35:17,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:17,130 INFO L225 Difference]: With dead ends: 2318 [2021-06-05 04:35:17,130 INFO L226 Difference]: Without dead ends: 2318 [2021-06-05 04:35:17,130 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 286.3ms TimeCoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:35:17,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2318 states. [2021-06-05 04:35:17,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2318 to 2194. [2021-06-05 04:35:17,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2194 states, 2193 states have (on average 2.8568171454628364) internal successors, (6265), 2193 states have internal predecessors, (6265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:17,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2194 states to 2194 states and 6265 transitions. [2021-06-05 04:35:17,152 INFO L78 Accepts]: Start accepts. Automaton has 2194 states and 6265 transitions. Word has length 19 [2021-06-05 04:35:17,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:17,152 INFO L482 AbstractCegarLoop]: Abstraction has 2194 states and 6265 transitions. [2021-06-05 04:35:17,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:17,153 INFO L276 IsEmpty]: Start isEmpty. Operand 2194 states and 6265 transitions. [2021-06-05 04:35:17,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:17,154 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:17,154 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:17,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 505 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4020 [2021-06-05 04:35:17,355 INFO L430 AbstractCegarLoop]: === Iteration 515 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:17,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:17,355 INFO L82 PathProgramCache]: Analyzing trace with hash -491076034, now seen corresponding path program 501 times [2021-06-05 04:35:17,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:17,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470943978] [2021-06-05 04:35:17,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:17,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:17,468 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:17,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:17,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470943978] [2021-06-05 04:35:17,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470943978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:17,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655254151] [2021-06-05 04:35:17,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:17,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:35:17,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:17,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:35:17,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:17,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:17,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:17,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:35:17,700 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:17,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:17,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:17,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:35:17,704 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:17,706 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:35:17,706 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:17,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:35:17,709 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:17,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:35:17,712 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:17,714 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:35:17,715 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:17,744 INFO L628 ElimStorePlain]: treesize reduction 21, result has 58.0 percent of original size [2021-06-05 04:35:17,744 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:35:17,744 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:35:17,744 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-06-05 04:35:17,781 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:17,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655254151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:17,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:17,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 04:35:17,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508783520] [2021-06-05 04:35:17,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:35:17,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:17,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:35:17,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:35:17,782 INFO L87 Difference]: Start difference. First operand 2194 states and 6265 transitions. Second operand has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:18,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:18,440 INFO L93 Difference]: Finished difference Result 2298 states and 6393 transitions. [2021-06-05 04:35:18,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 04:35:18,440 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:35:18,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:18,442 INFO L225 Difference]: With dead ends: 2298 [2021-06-05 04:35:18,442 INFO L226 Difference]: Without dead ends: 2288 [2021-06-05 04:35:18,443 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 558.2ms TimeCoverageRelationStatistics Valid=137, Invalid=1345, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 04:35:18,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2288 states. [2021-06-05 04:35:18,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2288 to 2205. [2021-06-05 04:35:18,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2205 states, 2204 states have (on average 2.8484573502722323) internal successors, (6278), 2204 states have internal predecessors, (6278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:18,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2205 states to 2205 states and 6278 transitions. [2021-06-05 04:35:18,464 INFO L78 Accepts]: Start accepts. Automaton has 2205 states and 6278 transitions. Word has length 19 [2021-06-05 04:35:18,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:18,464 INFO L482 AbstractCegarLoop]: Abstraction has 2205 states and 6278 transitions. [2021-06-05 04:35:18,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:18,464 INFO L276 IsEmpty]: Start isEmpty. Operand 2205 states and 6278 transitions. [2021-06-05 04:35:18,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:18,466 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:18,466 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:18,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 506 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4022 [2021-06-05 04:35:18,667 INFO L430 AbstractCegarLoop]: === Iteration 516 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:18,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:18,667 INFO L82 PathProgramCache]: Analyzing trace with hash -915612356, now seen corresponding path program 502 times [2021-06-05 04:35:18,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:18,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381990155] [2021-06-05 04:35:18,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:18,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:18,777 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:18,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:18,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381990155] [2021-06-05 04:35:18,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381990155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:18,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864151691] [2021-06-05 04:35:18,778 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:18,806 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:35:18,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:18,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:35:18,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:19,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:19,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:19,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:35:19,007 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:19,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:19,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:35:19,010 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:19,028 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-06-05 04:35:19,029 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:35:19,029 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:35:19,029 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-06-05 04:35:19,057 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:19,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864151691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:19,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:19,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 04:35:19,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596086936] [2021-06-05 04:35:19,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:35:19,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:19,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:35:19,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:35:19,057 INFO L87 Difference]: Start difference. First operand 2205 states and 6278 transitions. Second operand has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:20,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:20,990 INFO L93 Difference]: Finished difference Result 2504 states and 6789 transitions. [2021-06-05 04:35:20,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 04:35:20,991 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:35:20,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:20,993 INFO L225 Difference]: With dead ends: 2504 [2021-06-05 04:35:20,993 INFO L226 Difference]: Without dead ends: 2504 [2021-06-05 04:35:20,994 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1414 ImplicationChecksByTransitivity, 1627.0ms TimeCoverageRelationStatistics Valid=505, Invalid=4325, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 04:35:20,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2504 states. [2021-06-05 04:35:21,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2504 to 2206. [2021-06-05 04:35:21,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2206 states, 2205 states have (on average 2.852607709750567) internal successors, (6290), 2205 states have internal predecessors, (6290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:21,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2206 states to 2206 states and 6290 transitions. [2021-06-05 04:35:21,015 INFO L78 Accepts]: Start accepts. Automaton has 2206 states and 6290 transitions. Word has length 19 [2021-06-05 04:35:21,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:21,015 INFO L482 AbstractCegarLoop]: Abstraction has 2206 states and 6290 transitions. [2021-06-05 04:35:21,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:21,015 INFO L276 IsEmpty]: Start isEmpty. Operand 2206 states and 6290 transitions. [2021-06-05 04:35:21,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:21,017 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:21,017 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:21,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4027,507 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:21,218 INFO L430 AbstractCegarLoop]: === Iteration 517 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:21,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:21,218 INFO L82 PathProgramCache]: Analyzing trace with hash 15270232, now seen corresponding path program 503 times [2021-06-05 04:35:21,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:21,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677541603] [2021-06-05 04:35:21,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:21,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:21,344 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:21,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:21,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677541603] [2021-06-05 04:35:21,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677541603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:21,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773797103] [2021-06-05 04:35:21,344 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:21,373 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:35:21,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:21,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:35:21,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:21,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:21,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:21,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:35:21,577 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:21,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:21,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:21,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:35:21,581 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:21,583 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:35:21,583 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:21,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:35:21,586 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:21,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:35:21,589 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:21,591 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:35:21,591 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:21,620 INFO L628 ElimStorePlain]: treesize reduction 21, result has 58.0 percent of original size [2021-06-05 04:35:21,621 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:35:21,621 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:35:21,621 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-06-05 04:35:21,658 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:21,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773797103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:21,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:21,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 04:35:21,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74277751] [2021-06-05 04:35:21,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:35:21,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:21,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:35:21,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:35:21,658 INFO L87 Difference]: Start difference. First operand 2206 states and 6290 transitions. Second operand has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:22,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:22,484 INFO L93 Difference]: Finished difference Result 2327 states and 6443 transitions. [2021-06-05 04:35:22,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 04:35:22,484 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:35:22,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:22,486 INFO L225 Difference]: With dead ends: 2327 [2021-06-05 04:35:22,486 INFO L226 Difference]: Without dead ends: 2319 [2021-06-05 04:35:22,487 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 780.0ms TimeCoverageRelationStatistics Valid=203, Invalid=1959, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 04:35:22,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2319 states. [2021-06-05 04:35:22,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2319 to 2213. [2021-06-05 04:35:22,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2213 states, 2212 states have (on average 2.848101265822785) internal successors, (6300), 2212 states have internal predecessors, (6300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:22,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2213 states to 2213 states and 6300 transitions. [2021-06-05 04:35:22,507 INFO L78 Accepts]: Start accepts. Automaton has 2213 states and 6300 transitions. Word has length 19 [2021-06-05 04:35:22,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:22,507 INFO L482 AbstractCegarLoop]: Abstraction has 2213 states and 6300 transitions. [2021-06-05 04:35:22,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:22,507 INFO L276 IsEmpty]: Start isEmpty. Operand 2213 states and 6300 transitions. [2021-06-05 04:35:22,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:22,509 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:22,509 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:22,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4029,508 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:22,710 INFO L430 AbstractCegarLoop]: === Iteration 518 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:22,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:22,710 INFO L82 PathProgramCache]: Analyzing trace with hash -2076634470, now seen corresponding path program 504 times [2021-06-05 04:35:22,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:22,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651636411] [2021-06-05 04:35:22,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:22,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:22,819 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:22,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:22,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651636411] [2021-06-05 04:35:22,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651636411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:22,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403197094] [2021-06-05 04:35:22,819 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:22,848 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:35:22,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:22,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:35:22,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:23,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:23,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:23,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:35:23,065 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:23,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:23,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:35:23,068 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:23,087 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-06-05 04:35:23,087 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:35:23,087 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:35:23,087 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-06-05 04:35:23,114 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:23,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403197094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:23,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:23,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 04:35:23,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309210433] [2021-06-05 04:35:23,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:35:23,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:23,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:35:23,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:35:23,115 INFO L87 Difference]: Start difference. First operand 2213 states and 6300 transitions. Second operand has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:25,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:25,248 INFO L93 Difference]: Finished difference Result 2633 states and 7053 transitions. [2021-06-05 04:35:25,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 04:35:25,249 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:35:25,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:25,251 INFO L225 Difference]: With dead ends: 2633 [2021-06-05 04:35:25,251 INFO L226 Difference]: Without dead ends: 2633 [2021-06-05 04:35:25,252 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1826 ImplicationChecksByTransitivity, 1734.6ms TimeCoverageRelationStatistics Valid=521, Invalid=5331, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 04:35:25,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2633 states. [2021-06-05 04:35:25,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2633 to 2206. [2021-06-05 04:35:25,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2206 states, 2205 states have (on average 2.854421768707483) internal successors, (6294), 2205 states have internal predecessors, (6294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:25,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2206 states to 2206 states and 6294 transitions. [2021-06-05 04:35:25,274 INFO L78 Accepts]: Start accepts. Automaton has 2206 states and 6294 transitions. Word has length 19 [2021-06-05 04:35:25,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:25,274 INFO L482 AbstractCegarLoop]: Abstraction has 2206 states and 6294 transitions. [2021-06-05 04:35:25,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:25,274 INFO L276 IsEmpty]: Start isEmpty. Operand 2206 states and 6294 transitions. [2021-06-05 04:35:25,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:25,276 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:25,276 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:25,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 509 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4034 [2021-06-05 04:35:25,476 INFO L430 AbstractCegarLoop]: === Iteration 519 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:25,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:25,476 INFO L82 PathProgramCache]: Analyzing trace with hash -522585346, now seen corresponding path program 505 times [2021-06-05 04:35:25,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:25,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236465442] [2021-06-05 04:35:25,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:25,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:25,592 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:25,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:25,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236465442] [2021-06-05 04:35:25,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236465442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:25,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287678482] [2021-06-05 04:35:25,592 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:25,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:25,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:35:25,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:25,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:25,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:25,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:35:25,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:25,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:25,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:25,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:35:25,839 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:25,840 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:35:25,841 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:25,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:35:25,844 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:25,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:35:25,847 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:25,849 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:35:25,849 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:25,878 INFO L628 ElimStorePlain]: treesize reduction 21, result has 58.0 percent of original size [2021-06-05 04:35:25,879 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:35:25,879 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:35:25,879 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-06-05 04:35:25,916 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:25,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287678482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:25,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:25,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 04:35:25,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033932036] [2021-06-05 04:35:25,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:35:25,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:25,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:35:25,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:35:25,917 INFO L87 Difference]: Start difference. First operand 2206 states and 6294 transitions. Second operand has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:26,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:26,686 INFO L93 Difference]: Finished difference Result 2308 states and 6426 transitions. [2021-06-05 04:35:26,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 04:35:26,686 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:35:26,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:26,688 INFO L225 Difference]: With dead ends: 2308 [2021-06-05 04:35:26,688 INFO L226 Difference]: Without dead ends: 2299 [2021-06-05 04:35:26,689 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 750.4ms TimeCoverageRelationStatistics Valid=190, Invalid=1702, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 04:35:26,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2299 states. [2021-06-05 04:35:26,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2299 to 2209. [2021-06-05 04:35:26,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2209 states, 2208 states have (on average 2.8496376811594204) internal successors, (6292), 2208 states have internal predecessors, (6292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:26,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2209 states to 2209 states and 6292 transitions. [2021-06-05 04:35:26,710 INFO L78 Accepts]: Start accepts. Automaton has 2209 states and 6292 transitions. Word has length 19 [2021-06-05 04:35:26,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:26,710 INFO L482 AbstractCegarLoop]: Abstraction has 2209 states and 6292 transitions. [2021-06-05 04:35:26,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:26,711 INFO L276 IsEmpty]: Start isEmpty. Operand 2209 states and 6292 transitions. [2021-06-05 04:35:26,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:26,713 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:26,713 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:26,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4036,510 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:26,913 INFO L430 AbstractCegarLoop]: === Iteration 520 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:26,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:26,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1836992132, now seen corresponding path program 506 times [2021-06-05 04:35:26,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:26,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207164983] [2021-06-05 04:35:26,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:26,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:27,024 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:27,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:27,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207164983] [2021-06-05 04:35:27,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207164983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:27,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519856757] [2021-06-05 04:35:27,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:27,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:35:27,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:27,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:35:27,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:27,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:27,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:27,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:35:27,265 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:27,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:27,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:35:27,268 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:27,287 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-06-05 04:35:27,287 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:35:27,287 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:35:27,287 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-06-05 04:35:27,314 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:27,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519856757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:27,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:27,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 04:35:27,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720222382] [2021-06-05 04:35:27,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:35:27,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:27,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:35:27,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:35:27,315 INFO L87 Difference]: Start difference. First operand 2209 states and 6292 transitions. Second operand has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:28,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:28,647 INFO L93 Difference]: Finished difference Result 2528 states and 6875 transitions. [2021-06-05 04:35:28,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 04:35:28,647 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:35:28,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:28,650 INFO L225 Difference]: With dead ends: 2528 [2021-06-05 04:35:28,650 INFO L226 Difference]: Without dead ends: 2528 [2021-06-05 04:35:28,650 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 822 ImplicationChecksByTransitivity, 1140.7ms TimeCoverageRelationStatistics Valid=308, Invalid=2772, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 04:35:28,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2528 states. [2021-06-05 04:35:28,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2528 to 2210. [2021-06-05 04:35:28,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2210 states, 2209 states have (on average 2.8569488456315075) internal successors, (6311), 2209 states have internal predecessors, (6311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:28,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2210 states to 2210 states and 6311 transitions. [2021-06-05 04:35:28,673 INFO L78 Accepts]: Start accepts. Automaton has 2210 states and 6311 transitions. Word has length 19 [2021-06-05 04:35:28,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:28,673 INFO L482 AbstractCegarLoop]: Abstraction has 2210 states and 6311 transitions. [2021-06-05 04:35:28,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:28,673 INFO L276 IsEmpty]: Start isEmpty. Operand 2210 states and 6311 transitions. [2021-06-05 04:35:28,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:28,675 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:28,675 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:28,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4041,511 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:28,875 INFO L430 AbstractCegarLoop]: === Iteration 521 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:28,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:28,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1538274456, now seen corresponding path program 507 times [2021-06-05 04:35:28,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:28,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974503431] [2021-06-05 04:35:28,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:28,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:28,994 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:28,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:28,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974503431] [2021-06-05 04:35:28,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974503431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:28,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751158491] [2021-06-05 04:35:28,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:29,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:35:29,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:29,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:35:29,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:29,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:29,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:29,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:35:29,253 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:29,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:29,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:29,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:35:29,257 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:29,259 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:35:29,259 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:29,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:35:29,262 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:29,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:35:29,265 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:29,267 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:35:29,267 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:29,296 INFO L628 ElimStorePlain]: treesize reduction 21, result has 58.0 percent of original size [2021-06-05 04:35:29,296 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:35:29,297 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:35:29,297 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-06-05 04:35:29,333 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:29,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751158491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:29,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:29,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 04:35:29,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120925782] [2021-06-05 04:35:29,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:35:29,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:29,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:35:29,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:35:29,334 INFO L87 Difference]: Start difference. First operand 2210 states and 6311 transitions. Second operand has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:30,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:30,180 INFO L93 Difference]: Finished difference Result 2283 states and 6410 transitions. [2021-06-05 04:35:30,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 04:35:30,181 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:35:30,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:30,183 INFO L225 Difference]: With dead ends: 2283 [2021-06-05 04:35:30,183 INFO L226 Difference]: Without dead ends: 2277 [2021-06-05 04:35:30,183 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 754.8ms TimeCoverageRelationStatistics Valid=185, Invalid=1537, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 04:35:30,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2277 states. [2021-06-05 04:35:30,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2277 to 2211. [2021-06-05 04:35:30,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2211 states, 2210 states have (on average 2.853393665158371) internal successors, (6306), 2210 states have internal predecessors, (6306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:30,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2211 states to 2211 states and 6306 transitions. [2021-06-05 04:35:30,203 INFO L78 Accepts]: Start accepts. Automaton has 2211 states and 6306 transitions. Word has length 19 [2021-06-05 04:35:30,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:30,203 INFO L482 AbstractCegarLoop]: Abstraction has 2211 states and 6306 transitions. [2021-06-05 04:35:30,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:30,203 INFO L276 IsEmpty]: Start isEmpty. Operand 2211 states and 6306 transitions. [2021-06-05 04:35:30,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:30,205 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:30,205 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:30,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 512 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4043 [2021-06-05 04:35:30,406 INFO L430 AbstractCegarLoop]: === Iteration 522 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:30,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:30,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1829261734, now seen corresponding path program 508 times [2021-06-05 04:35:30,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:30,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962463799] [2021-06-05 04:35:30,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:30,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:30,529 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:30,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:30,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962463799] [2021-06-05 04:35:30,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962463799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:30,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275176533] [2021-06-05 04:35:30,529 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:30,557 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:35:30,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:30,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:35:30,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:30,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:30,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:30,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:35:30,757 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:30,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:30,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:30,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:35:30,760 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:30,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:30,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:30,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:35:30,764 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:30,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:30,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:35:30,767 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:30,801 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:35:30,801 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:35:30,802 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:35:30,802 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:35:30,863 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:30,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275176533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:30,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:30,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 04:35:30,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823739129] [2021-06-05 04:35:30,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:35:30,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:30,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:35:30,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:35:30,863 INFO L87 Difference]: Start difference. First operand 2211 states and 6306 transitions. Second operand has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:31,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:31,818 INFO L93 Difference]: Finished difference Result 2461 states and 6686 transitions. [2021-06-05 04:35:31,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 04:35:31,818 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:35:31,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:31,821 INFO L225 Difference]: With dead ends: 2461 [2021-06-05 04:35:31,821 INFO L226 Difference]: Without dead ends: 2461 [2021-06-05 04:35:31,821 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 768.2ms TimeCoverageRelationStatistics Valid=185, Invalid=1375, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 04:35:31,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2461 states. [2021-06-05 04:35:31,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2461 to 2196. [2021-06-05 04:35:31,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2196 states, 2195 states have (on average 2.849658314350797) internal successors, (6255), 2195 states have internal predecessors, (6255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:31,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2196 states to 2196 states and 6255 transitions. [2021-06-05 04:35:31,842 INFO L78 Accepts]: Start accepts. Automaton has 2196 states and 6255 transitions. Word has length 19 [2021-06-05 04:35:31,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:31,842 INFO L482 AbstractCegarLoop]: Abstraction has 2196 states and 6255 transitions. [2021-06-05 04:35:31,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:31,842 INFO L276 IsEmpty]: Start isEmpty. Operand 2196 states and 6255 transitions. [2021-06-05 04:35:31,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:31,844 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:31,844 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:32,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4048,513 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:32,044 INFO L430 AbstractCegarLoop]: === Iteration 523 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:32,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:32,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1027645506, now seen corresponding path program 509 times [2021-06-05 04:35:32,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:32,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268792523] [2021-06-05 04:35:32,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:32,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:32,167 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:32,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:32,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268792523] [2021-06-05 04:35:32,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268792523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:32,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582213345] [2021-06-05 04:35:32,167 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:32,197 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:35:32,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:32,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:35:32,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:32,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:32,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:32,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:35:32,399 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:32,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:32,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:32,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:35:32,402 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:32,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:32,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:32,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:35:32,406 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:32,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:32,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:35:32,409 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:32,443 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:35:32,444 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:35:32,444 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:35:32,444 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:35:32,526 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:32,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582213345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:32,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:32,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 04:35:32,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590912837] [2021-06-05 04:35:32,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:35:32,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:32,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:35:32,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:35:32,527 INFO L87 Difference]: Start difference. First operand 2196 states and 6255 transitions. Second operand has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:33,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:33,331 INFO L93 Difference]: Finished difference Result 2306 states and 6441 transitions. [2021-06-05 04:35:33,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 04:35:33,331 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:35:33,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:33,333 INFO L225 Difference]: With dead ends: 2306 [2021-06-05 04:35:33,334 INFO L226 Difference]: Without dead ends: 2301 [2021-06-05 04:35:33,334 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 784.9ms TimeCoverageRelationStatistics Valid=184, Invalid=1376, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 04:35:33,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2301 states. [2021-06-05 04:35:33,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2301 to 2201. [2021-06-05 04:35:33,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2201 states, 2200 states have (on average 2.8495454545454546) internal successors, (6269), 2200 states have internal predecessors, (6269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:33,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2201 states to 2201 states and 6269 transitions. [2021-06-05 04:35:33,354 INFO L78 Accepts]: Start accepts. Automaton has 2201 states and 6269 transitions. Word has length 19 [2021-06-05 04:35:33,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:33,354 INFO L482 AbstractCegarLoop]: Abstraction has 2201 states and 6269 transitions. [2021-06-05 04:35:33,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:33,355 INFO L276 IsEmpty]: Start isEmpty. Operand 2201 states and 6269 transitions. [2021-06-05 04:35:33,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:33,356 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:33,357 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:33,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4052,514 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:33,557 INFO L430 AbstractCegarLoop]: === Iteration 524 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:33,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:33,557 INFO L82 PathProgramCache]: Analyzing trace with hash 690698200, now seen corresponding path program 510 times [2021-06-05 04:35:33,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:33,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227919003] [2021-06-05 04:35:33,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:33,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:33,682 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:33,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:33,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227919003] [2021-06-05 04:35:33,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227919003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:33,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399395413] [2021-06-05 04:35:33,683 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:33,713 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:35:33,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:33,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:35:33,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:33,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:33,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:33,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:35:33,917 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:33,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:33,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:33,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:35:33,921 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:33,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:33,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:33,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:35:33,924 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:33,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:33,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:35:33,927 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:33,962 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:35:33,962 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:35:33,962 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:35:33,963 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:35:34,021 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:34,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399395413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:34,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:34,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 04:35:34,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018994362] [2021-06-05 04:35:34,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:35:34,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:34,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:35:34,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:35:34,022 INFO L87 Difference]: Start difference. First operand 2201 states and 6269 transitions. Second operand has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:34,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:34,549 INFO L93 Difference]: Finished difference Result 2295 states and 6427 transitions. [2021-06-05 04:35:34,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:35:34,549 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:35:34,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:34,552 INFO L225 Difference]: With dead ends: 2295 [2021-06-05 04:35:34,552 INFO L226 Difference]: Without dead ends: 2295 [2021-06-05 04:35:34,552 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 567.7ms TimeCoverageRelationStatistics Valid=132, Invalid=924, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:35:34,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2295 states. [2021-06-05 04:35:34,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2295 to 2173. [2021-06-05 04:35:34,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2173 states, 2172 states have (on average 2.848987108655617) internal successors, (6188), 2172 states have internal predecessors, (6188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:34,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2173 states to 2173 states and 6188 transitions. [2021-06-05 04:35:34,574 INFO L78 Accepts]: Start accepts. Automaton has 2173 states and 6188 transitions. Word has length 19 [2021-06-05 04:35:34,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:34,574 INFO L482 AbstractCegarLoop]: Abstraction has 2173 states and 6188 transitions. [2021-06-05 04:35:34,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:34,574 INFO L276 IsEmpty]: Start isEmpty. Operand 2173 states and 6188 transitions. [2021-06-05 04:35:34,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:34,576 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:34,576 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:34,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 515 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4057 [2021-06-05 04:35:34,776 INFO L430 AbstractCegarLoop]: === Iteration 525 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:34,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:34,777 INFO L82 PathProgramCache]: Analyzing trace with hash 221158592, now seen corresponding path program 511 times [2021-06-05 04:35:34,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:34,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179762297] [2021-06-05 04:35:34,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:34,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:34,883 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:35:34,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:34,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179762297] [2021-06-05 04:35:34,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179762297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:34,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487298362] [2021-06-05 04:35:34,883 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:34,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:34,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:35:34,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:35,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:35,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:35,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:35:35,083 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:35,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:35,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:35,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:35:35,086 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:35,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:35,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:35,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:35:35,090 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:35,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:35,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:35:35,092 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:35,127 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:35:35,128 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:35:35,128 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:35:35,128 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:35:35,201 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:35,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487298362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:35,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:35,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 04:35:35,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986730507] [2021-06-05 04:35:35,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:35:35,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:35,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:35:35,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:35:35,201 INFO L87 Difference]: Start difference. First operand 2173 states and 6188 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:36,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:36,028 INFO L93 Difference]: Finished difference Result 2219 states and 6277 transitions. [2021-06-05 04:35:36,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 04:35:36,028 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:35:36,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:36,030 INFO L225 Difference]: With dead ends: 2219 [2021-06-05 04:35:36,030 INFO L226 Difference]: Without dead ends: 2215 [2021-06-05 04:35:36,031 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 823.4ms TimeCoverageRelationStatistics Valid=197, Invalid=1609, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 04:35:36,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2215 states. [2021-06-05 04:35:36,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2215 to 2177. [2021-06-05 04:35:36,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2177 states, 2176 states have (on average 2.846966911764706) internal successors, (6195), 2176 states have internal predecessors, (6195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:36,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2177 states to 2177 states and 6195 transitions. [2021-06-05 04:35:36,051 INFO L78 Accepts]: Start accepts. Automaton has 2177 states and 6195 transitions. Word has length 19 [2021-06-05 04:35:36,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:36,051 INFO L482 AbstractCegarLoop]: Abstraction has 2177 states and 6195 transitions. [2021-06-05 04:35:36,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:36,051 INFO L276 IsEmpty]: Start isEmpty. Operand 2177 states and 6195 transitions. [2021-06-05 04:35:36,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:36,053 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:36,053 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:36,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4061,516 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:36,254 INFO L430 AbstractCegarLoop]: === Iteration 526 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:36,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:36,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1398193498, now seen corresponding path program 512 times [2021-06-05 04:35:36,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:36,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883155160] [2021-06-05 04:35:36,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:36,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:36,336 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:36,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:36,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883155160] [2021-06-05 04:35:36,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883155160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:36,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784225667] [2021-06-05 04:35:36,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:36,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:35:36,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:36,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:35:36,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:36,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:36,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:36,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:35:36,506 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:36,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:36,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:36,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:35:36,510 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:36,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:36,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:36,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:35:36,513 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:36,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:36,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:35:36,516 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:36,551 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:35:36,551 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:35:36,552 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:35:36,552 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:35:36,607 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:36,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784225667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:36,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:36,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-06-05 04:35:36,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799342456] [2021-06-05 04:35:36,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:35:36,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:36,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:35:36,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:35:36,608 INFO L87 Difference]: Start difference. First operand 2177 states and 6195 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:37,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:37,040 INFO L93 Difference]: Finished difference Result 2423 states and 6683 transitions. [2021-06-05 04:35:37,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:35:37,040 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:35:37,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:37,042 INFO L225 Difference]: With dead ends: 2423 [2021-06-05 04:35:37,042 INFO L226 Difference]: Without dead ends: 2423 [2021-06-05 04:35:37,042 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 420.8ms TimeCoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:35:37,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2423 states. [2021-06-05 04:35:37,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2423 to 2237. [2021-06-05 04:35:37,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2237 states, 2236 states have (on average 2.8564400715563507) internal successors, (6387), 2236 states have internal predecessors, (6387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:37,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2237 states to 2237 states and 6387 transitions. [2021-06-05 04:35:37,064 INFO L78 Accepts]: Start accepts. Automaton has 2237 states and 6387 transitions. Word has length 19 [2021-06-05 04:35:37,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:37,064 INFO L482 AbstractCegarLoop]: Abstraction has 2237 states and 6387 transitions. [2021-06-05 04:35:37,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:37,065 INFO L276 IsEmpty]: Start isEmpty. Operand 2237 states and 6387 transitions. [2021-06-05 04:35:37,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:37,067 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:37,067 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:37,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 517 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4067 [2021-06-05 04:35:37,267 INFO L430 AbstractCegarLoop]: === Iteration 527 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:37,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:37,267 INFO L82 PathProgramCache]: Analyzing trace with hash -2095157570, now seen corresponding path program 513 times [2021-06-05 04:35:37,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:37,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001774760] [2021-06-05 04:35:37,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:37,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:37,348 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:37,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:37,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001774760] [2021-06-05 04:35:37,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001774760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:37,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100503977] [2021-06-05 04:35:37,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:37,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:35:37,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:37,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:35:37,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:37,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:37,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:37,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:35:37,517 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:37,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:37,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:37,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:35:37,520 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:37,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:37,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:37,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:35:37,524 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:37,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:37,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:35:37,527 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:37,562 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:35:37,562 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:35:37,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:35:37,563 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:35:37,638 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:37,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100503977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:37,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:37,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-06-05 04:35:37,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864745826] [2021-06-05 04:35:37,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:35:37,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:37,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:35:37,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:35:37,639 INFO L87 Difference]: Start difference. First operand 2237 states and 6387 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:38,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:38,348 INFO L93 Difference]: Finished difference Result 2398 states and 6660 transitions. [2021-06-05 04:35:38,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 04:35:38,349 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:35:38,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:38,351 INFO L225 Difference]: With dead ends: 2398 [2021-06-05 04:35:38,351 INFO L226 Difference]: Without dead ends: 2393 [2021-06-05 04:35:38,352 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 569.5ms TimeCoverageRelationStatistics Valid=147, Invalid=1113, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 04:35:38,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2393 states. [2021-06-05 04:35:38,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2393 to 2244. [2021-06-05 04:35:38,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2244 states, 2243 states have (on average 2.8586714222024074) internal successors, (6412), 2243 states have internal predecessors, (6412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:38,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2244 states to 2244 states and 6412 transitions. [2021-06-05 04:35:38,373 INFO L78 Accepts]: Start accepts. Automaton has 2244 states and 6412 transitions. Word has length 19 [2021-06-05 04:35:38,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:38,373 INFO L482 AbstractCegarLoop]: Abstraction has 2244 states and 6412 transitions. [2021-06-05 04:35:38,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:38,373 INFO L276 IsEmpty]: Start isEmpty. Operand 2244 states and 6412 transitions. [2021-06-05 04:35:38,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:38,375 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:38,375 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:38,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4071,518 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:38,576 INFO L430 AbstractCegarLoop]: === Iteration 528 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:38,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:38,576 INFO L82 PathProgramCache]: Analyzing trace with hash -376813864, now seen corresponding path program 514 times [2021-06-05 04:35:38,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:38,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533378116] [2021-06-05 04:35:38,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:38,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:38,670 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:38,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:38,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533378116] [2021-06-05 04:35:38,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533378116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:38,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541141936] [2021-06-05 04:35:38,671 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:38,699 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:35:38,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:38,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:35:38,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:38,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:38,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:38,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:35:38,837 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:38,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:38,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:38,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:35:38,841 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:38,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:38,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:38,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:35:38,844 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:38,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:38,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:35:38,847 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:38,882 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:35:38,883 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:35:38,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:35:38,883 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:35:38,936 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:38,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541141936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:38,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:38,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-06-05 04:35:38,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88922140] [2021-06-05 04:35:38,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:35:38,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:38,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:35:38,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:35:38,937 INFO L87 Difference]: Start difference. First operand 2244 states and 6412 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:39,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:39,273 INFO L93 Difference]: Finished difference Result 2365 states and 6618 transitions. [2021-06-05 04:35:39,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:35:39,273 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:35:39,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:39,276 INFO L225 Difference]: With dead ends: 2365 [2021-06-05 04:35:39,276 INFO L226 Difference]: Without dead ends: 2365 [2021-06-05 04:35:39,276 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 345.8ms TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:35:39,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2365 states. [2021-06-05 04:35:39,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2365 to 2237. [2021-06-05 04:35:39,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2237 states, 2236 states have (on average 2.855098389982111) internal successors, (6384), 2236 states have internal predecessors, (6384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:39,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2237 states to 2237 states and 6384 transitions. [2021-06-05 04:35:39,297 INFO L78 Accepts]: Start accepts. Automaton has 2237 states and 6384 transitions. Word has length 19 [2021-06-05 04:35:39,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:39,297 INFO L482 AbstractCegarLoop]: Abstraction has 2237 states and 6384 transitions. [2021-06-05 04:35:39,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:39,297 INFO L276 IsEmpty]: Start isEmpty. Operand 2237 states and 6384 transitions. [2021-06-05 04:35:39,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:39,299 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:39,299 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:39,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 519 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4076 [2021-06-05 04:35:39,499 INFO L430 AbstractCegarLoop]: === Iteration 529 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:39,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:39,499 INFO L82 PathProgramCache]: Analyzing trace with hash -2087427172, now seen corresponding path program 515 times [2021-06-05 04:35:39,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:39,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063906871] [2021-06-05 04:35:39,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:39,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:39,574 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:39,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:39,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063906871] [2021-06-05 04:35:39,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063906871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:39,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871911383] [2021-06-05 04:35:39,574 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:39,604 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:35:39,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:39,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:35:39,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:39,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:39,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:39,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:35:39,773 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:39,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:39,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:35:39,776 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:39,799 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:35:39,800 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:35:39,800 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:35:39,800 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:35:39,823 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:39,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871911383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:39,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:39,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-06-05 04:35:39,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52154286] [2021-06-05 04:35:39,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:35:39,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:39,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:35:39,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:35:39,823 INFO L87 Difference]: Start difference. First operand 2237 states and 6384 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:40,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:40,107 INFO L93 Difference]: Finished difference Result 2387 states and 6677 transitions. [2021-06-05 04:35:40,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:35:40,107 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:35:40,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:40,110 INFO L225 Difference]: With dead ends: 2387 [2021-06-05 04:35:40,110 INFO L226 Difference]: Without dead ends: 2387 [2021-06-05 04:35:40,110 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 210.8ms TimeCoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:35:40,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2387 states. [2021-06-05 04:35:40,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2387 to 2237. [2021-06-05 04:35:40,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2237 states, 2236 states have (on average 2.855098389982111) internal successors, (6384), 2236 states have internal predecessors, (6384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:40,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2237 states to 2237 states and 6384 transitions. [2021-06-05 04:35:40,139 INFO L78 Accepts]: Start accepts. Automaton has 2237 states and 6384 transitions. Word has length 19 [2021-06-05 04:35:40,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:40,140 INFO L482 AbstractCegarLoop]: Abstraction has 2237 states and 6384 transitions. [2021-06-05 04:35:40,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:40,140 INFO L276 IsEmpty]: Start isEmpty. Operand 2237 states and 6384 transitions. [2021-06-05 04:35:40,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:40,142 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:40,142 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:40,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4080,520 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:40,342 INFO L430 AbstractCegarLoop]: === Iteration 530 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:40,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:40,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1382020, now seen corresponding path program 516 times [2021-06-05 04:35:40,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:40,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581264618] [2021-06-05 04:35:40,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:40,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:40,415 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:35:40,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:40,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581264618] [2021-06-05 04:35:40,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581264618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:40,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080047182] [2021-06-05 04:35:40,416 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:40,446 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:35:40,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:40,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:35:40,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:40,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:40,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:40,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:35:40,577 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:40,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:40,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:40,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:35:40,580 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:40,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:40,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:40,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:35:40,584 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:40,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:40,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:35:40,587 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:40,622 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:35:40,622 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:35:40,622 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:35:40,622 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:35:40,690 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:40,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080047182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:40,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:40,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 19 [2021-06-05 04:35:40,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296440503] [2021-06-05 04:35:40,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:35:40,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:40,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:35:40,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:35:40,690 INFO L87 Difference]: Start difference. First operand 2237 states and 6384 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:41,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:41,162 INFO L93 Difference]: Finished difference Result 2337 states and 6562 transitions. [2021-06-05 04:35:41,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 04:35:41,162 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:35:41,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:41,165 INFO L225 Difference]: With dead ends: 2337 [2021-06-05 04:35:41,165 INFO L226 Difference]: Without dead ends: 2333 [2021-06-05 04:35:41,165 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 447.3ms TimeCoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:35:41,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2333 states. [2021-06-05 04:35:41,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2333 to 2251. [2021-06-05 04:35:41,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2251 states, 2250 states have (on average 2.8537777777777777) internal successors, (6421), 2250 states have internal predecessors, (6421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:41,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2251 states to 2251 states and 6421 transitions. [2021-06-05 04:35:41,186 INFO L78 Accepts]: Start accepts. Automaton has 2251 states and 6421 transitions. Word has length 19 [2021-06-05 04:35:41,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:41,186 INFO L482 AbstractCegarLoop]: Abstraction has 2251 states and 6421 transitions. [2021-06-05 04:35:41,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:41,186 INFO L276 IsEmpty]: Start isEmpty. Operand 2251 states and 6421 transitions. [2021-06-05 04:35:41,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:41,188 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:41,188 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:41,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 521 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4083 [2021-06-05 04:35:41,388 INFO L430 AbstractCegarLoop]: === Iteration 531 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:41,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:41,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1727665314, now seen corresponding path program 517 times [2021-06-05 04:35:41,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:41,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254728730] [2021-06-05 04:35:41,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:41,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:41,457 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:35:41,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:41,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254728730] [2021-06-05 04:35:41,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254728730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:41,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891155485] [2021-06-05 04:35:41,457 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:41,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:41,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:35:41,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:41,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:35:41,660 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:41,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:35:41,663 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:41,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:41,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:41,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:35:41,667 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:41,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:35:41,670 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:41,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:35:41,673 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:41,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:41,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:35:41,676 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:41,735 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-05 04:35:41,735 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:35:41,736 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:35:41,736 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-05 04:35:41,764 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:41,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891155485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:41,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:41,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 19 [2021-06-05 04:35:41,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209398628] [2021-06-05 04:35:41,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:35:41,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:41,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:35:41,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:35:41,765 INFO L87 Difference]: Start difference. First operand 2251 states and 6421 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:42,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:42,111 INFO L93 Difference]: Finished difference Result 2280 states and 6460 transitions. [2021-06-05 04:35:42,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:35:42,112 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:35:42,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:42,114 INFO L225 Difference]: With dead ends: 2280 [2021-06-05 04:35:42,114 INFO L226 Difference]: Without dead ends: 2272 [2021-06-05 04:35:42,114 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 336.3ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:35:42,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2272 states. [2021-06-05 04:35:42,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2272 to 2247. [2021-06-05 04:35:42,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2247 states, 2246 states have (on average 2.852626892252894) internal successors, (6407), 2246 states have internal predecessors, (6407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:42,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2247 states to 2247 states and 6407 transitions. [2021-06-05 04:35:42,134 INFO L78 Accepts]: Start accepts. Automaton has 2247 states and 6407 transitions. Word has length 19 [2021-06-05 04:35:42,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:42,134 INFO L482 AbstractCegarLoop]: Abstraction has 2247 states and 6407 transitions. [2021-06-05 04:35:42,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:42,135 INFO L276 IsEmpty]: Start isEmpty. Operand 2247 states and 6407 transitions. [2021-06-05 04:35:42,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:42,136 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:42,136 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:42,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 522 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4089 [2021-06-05 04:35:42,337 INFO L430 AbstractCegarLoop]: === Iteration 532 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:42,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:42,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1095473608, now seen corresponding path program 518 times [2021-06-05 04:35:42,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:42,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812505124] [2021-06-05 04:35:42,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:42,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:42,417 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:35:42,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:42,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812505124] [2021-06-05 04:35:42,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812505124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:42,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100061263] [2021-06-05 04:35:42,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:42,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:35:42,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:42,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:35:42,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:42,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:42,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:42,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:35:42,582 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:42,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:42,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:42,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:35:42,585 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:42,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:42,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:42,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:35:42,589 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:42,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:42,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:35:42,592 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:42,626 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:35:42,627 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:35:42,627 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:35:42,627 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:35:42,696 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:42,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100061263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:42,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:42,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-06-05 04:35:42,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621071726] [2021-06-05 04:35:42,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:35:42,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:42,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:35:42,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:35:42,697 INFO L87 Difference]: Start difference. First operand 2247 states and 6407 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:43,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:43,193 INFO L93 Difference]: Finished difference Result 2328 states and 6530 transitions. [2021-06-05 04:35:43,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 04:35:43,193 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:35:43,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:43,196 INFO L225 Difference]: With dead ends: 2328 [2021-06-05 04:35:43,196 INFO L226 Difference]: Without dead ends: 2324 [2021-06-05 04:35:43,196 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 500.2ms TimeCoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 04:35:43,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2324 states. [2021-06-05 04:35:43,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2324 to 2242. [2021-06-05 04:35:43,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2242 states, 2241 states have (on average 2.8500669344042837) internal successors, (6387), 2241 states have internal predecessors, (6387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:43,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2242 states to 2242 states and 6387 transitions. [2021-06-05 04:35:43,228 INFO L78 Accepts]: Start accepts. Automaton has 2242 states and 6387 transitions. Word has length 19 [2021-06-05 04:35:43,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:43,228 INFO L482 AbstractCegarLoop]: Abstraction has 2242 states and 6387 transitions. [2021-06-05 04:35:43,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:43,228 INFO L276 IsEmpty]: Start isEmpty. Operand 2242 states and 6387 transitions. [2021-06-05 04:35:43,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:43,230 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:43,230 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:43,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 523 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4096 [2021-06-05 04:35:43,430 INFO L430 AbstractCegarLoop]: === Iteration 533 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:43,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:43,431 INFO L82 PathProgramCache]: Analyzing trace with hash 633573726, now seen corresponding path program 519 times [2021-06-05 04:35:43,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:43,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45107731] [2021-06-05 04:35:43,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:43,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:43,507 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:35:43,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:43,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45107731] [2021-06-05 04:35:43,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45107731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:43,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88826596] [2021-06-05 04:35:43,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:43,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:35:43,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:43,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:35:43,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:43,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:35:43,722 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:43,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:35:43,725 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:43,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:43,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:43,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:35:43,729 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:43,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:35:43,732 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:43,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:35:43,735 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:43,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:43,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:35:43,738 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:43,769 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-05 04:35:43,770 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:35:43,771 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:35:43,771 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-05 04:35:43,801 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:43,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88826596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:43,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:43,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-06-05 04:35:43,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506977716] [2021-06-05 04:35:43,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:35:43,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:43,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:35:43,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:35:43,802 INFO L87 Difference]: Start difference. First operand 2242 states and 6387 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:44,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:44,229 INFO L93 Difference]: Finished difference Result 2274 states and 6431 transitions. [2021-06-05 04:35:44,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:35:44,230 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:35:44,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:44,232 INFO L225 Difference]: With dead ends: 2274 [2021-06-05 04:35:44,232 INFO L226 Difference]: Without dead ends: 2266 [2021-06-05 04:35:44,232 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 405.9ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:35:44,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2266 states. [2021-06-05 04:35:44,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2266 to 2226. [2021-06-05 04:35:44,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2226 states, 2225 states have (on average 2.8503370786516853) internal successors, (6342), 2225 states have internal predecessors, (6342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:44,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2226 states to 2226 states and 6342 transitions. [2021-06-05 04:35:44,253 INFO L78 Accepts]: Start accepts. Automaton has 2226 states and 6342 transitions. Word has length 19 [2021-06-05 04:35:44,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:44,253 INFO L482 AbstractCegarLoop]: Abstraction has 2226 states and 6342 transitions. [2021-06-05 04:35:44,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:44,253 INFO L276 IsEmpty]: Start isEmpty. Operand 2226 states and 6342 transitions. [2021-06-05 04:35:44,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:44,255 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:44,255 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:44,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4102,524 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:44,456 INFO L430 AbstractCegarLoop]: === Iteration 534 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:44,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:44,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1629909414, now seen corresponding path program 520 times [2021-06-05 04:35:44,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:44,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169836580] [2021-06-05 04:35:44,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:44,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:44,551 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:44,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:44,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169836580] [2021-06-05 04:35:44,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169836580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:44,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736956808] [2021-06-05 04:35:44,551 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:44,580 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:35:44,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:44,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:35:44,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:44,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:44,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:44,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:35:44,735 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:44,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:44,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:44,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:35:44,739 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:44,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:44,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:44,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:35:44,743 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:44,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:44,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:35:44,746 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:44,782 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:35:44,782 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:35:44,782 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:35:44,782 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:35:44,839 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:44,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736956808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:44,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:44,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-06-05 04:35:44,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807416307] [2021-06-05 04:35:44,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:35:44,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:44,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:35:44,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:35:44,840 INFO L87 Difference]: Start difference. First operand 2226 states and 6342 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:45,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:45,330 INFO L93 Difference]: Finished difference Result 2457 states and 6799 transitions. [2021-06-05 04:35:45,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:35:45,330 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:35:45,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:45,332 INFO L225 Difference]: With dead ends: 2457 [2021-06-05 04:35:45,333 INFO L226 Difference]: Without dead ends: 2457 [2021-06-05 04:35:45,333 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 415.5ms TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:35:45,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2457 states. [2021-06-05 04:35:45,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2457 to 2278. [2021-06-05 04:35:45,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2278 states, 2277 states have (on average 2.8563899868247695) internal successors, (6504), 2277 states have internal predecessors, (6504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:45,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2278 states to 2278 states and 6504 transitions. [2021-06-05 04:35:45,355 INFO L78 Accepts]: Start accepts. Automaton has 2278 states and 6504 transitions. Word has length 19 [2021-06-05 04:35:45,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:45,355 INFO L482 AbstractCegarLoop]: Abstraction has 2278 states and 6504 transitions. [2021-06-05 04:35:45,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:45,356 INFO L276 IsEmpty]: Start isEmpty. Operand 2278 states and 6504 transitions. [2021-06-05 04:35:45,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:45,358 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:45,358 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:45,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4109,525 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:45,558 INFO L430 AbstractCegarLoop]: === Iteration 535 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:45,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:45,558 INFO L82 PathProgramCache]: Analyzing trace with hash -828293186, now seen corresponding path program 521 times [2021-06-05 04:35:45,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:45,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973859364] [2021-06-05 04:35:45,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:45,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:45,652 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:45,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:45,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973859364] [2021-06-05 04:35:45,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973859364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:45,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302282952] [2021-06-05 04:35:45,652 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:45,682 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:35:45,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:45,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:35:45,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:45,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:45,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:45,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:35:45,832 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:45,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:45,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:45,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:35:45,835 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:45,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:45,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:45,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:35:45,838 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:45,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:45,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:35:45,841 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:45,876 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:35:45,876 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:35:45,877 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:35:45,877 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:35:45,952 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:45,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302282952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:45,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:45,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-06-05 04:35:45,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482811143] [2021-06-05 04:35:45,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:35:45,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:45,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:35:45,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:35:45,952 INFO L87 Difference]: Start difference. First operand 2278 states and 6504 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:46,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:46,761 INFO L93 Difference]: Finished difference Result 2478 states and 6869 transitions. [2021-06-05 04:35:46,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 04:35:46,762 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:35:46,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:46,764 INFO L225 Difference]: With dead ends: 2478 [2021-06-05 04:35:46,764 INFO L226 Difference]: Without dead ends: 2470 [2021-06-05 04:35:46,764 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 697.0ms TimeCoverageRelationStatistics Valid=171, Invalid=1389, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 04:35:46,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-06-05 04:35:46,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 2290. [2021-06-05 04:35:46,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2290 states, 2289 states have (on average 2.859327217125382) internal successors, (6545), 2289 states have internal predecessors, (6545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:46,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2290 states to 2290 states and 6545 transitions. [2021-06-05 04:35:46,787 INFO L78 Accepts]: Start accepts. Automaton has 2290 states and 6545 transitions. Word has length 19 [2021-06-05 04:35:46,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:46,787 INFO L482 AbstractCegarLoop]: Abstraction has 2290 states and 6545 transitions. [2021-06-05 04:35:46,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:46,787 INFO L276 IsEmpty]: Start isEmpty. Operand 2290 states and 6545 transitions. [2021-06-05 04:35:46,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:46,789 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:46,789 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:46,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4113,526 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:46,989 INFO L430 AbstractCegarLoop]: === Iteration 536 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:46,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:46,989 INFO L82 PathProgramCache]: Analyzing trace with hash 890050520, now seen corresponding path program 522 times [2021-06-05 04:35:46,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:46,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904542304] [2021-06-05 04:35:46,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:46,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:47,084 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:47,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:47,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904542304] [2021-06-05 04:35:47,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904542304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:47,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229262495] [2021-06-05 04:35:47,084 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:47,114 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:35:47,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:47,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:35:47,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:47,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:47,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:47,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:35:47,269 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:47,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:47,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:47,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:35:47,272 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:47,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:47,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:47,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:35:47,276 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:47,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:47,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:35:47,279 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:47,314 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:35:47,314 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:35:47,314 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:35:47,315 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:35:47,369 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:47,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229262495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:47,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:47,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-06-05 04:35:47,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107632891] [2021-06-05 04:35:47,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:35:47,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:47,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:35:47,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:35:47,369 INFO L87 Difference]: Start difference. First operand 2290 states and 6545 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:47,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:47,925 INFO L93 Difference]: Finished difference Result 2446 states and 6828 transitions. [2021-06-05 04:35:47,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:35:47,925 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:35:47,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:47,928 INFO L225 Difference]: With dead ends: 2446 [2021-06-05 04:35:47,928 INFO L226 Difference]: Without dead ends: 2446 [2021-06-05 04:35:47,928 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 447.0ms TimeCoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:35:47,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2446 states. [2021-06-05 04:35:47,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2446 to 2280. [2021-06-05 04:35:47,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2280 states, 2279 states have (on average 2.8547608600263272) internal successors, (6506), 2279 states have internal predecessors, (6506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:47,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2280 states to 2280 states and 6506 transitions. [2021-06-05 04:35:47,960 INFO L78 Accepts]: Start accepts. Automaton has 2280 states and 6506 transitions. Word has length 19 [2021-06-05 04:35:47,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:47,960 INFO L482 AbstractCegarLoop]: Abstraction has 2280 states and 6506 transitions. [2021-06-05 04:35:47,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:47,960 INFO L276 IsEmpty]: Start isEmpty. Operand 2280 states and 6506 transitions. [2021-06-05 04:35:47,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:47,962 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:47,962 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:48,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4118,527 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:48,163 INFO L430 AbstractCegarLoop]: === Iteration 537 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:48,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:48,163 INFO L82 PathProgramCache]: Analyzing trace with hash -820562788, now seen corresponding path program 523 times [2021-06-05 04:35:48,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:48,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890659829] [2021-06-05 04:35:48,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:48,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:48,250 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:48,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:48,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890659829] [2021-06-05 04:35:48,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890659829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:48,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874957768] [2021-06-05 04:35:48,250 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:48,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:48,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:35:48,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:48,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:48,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:48,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:35:48,508 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:48,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:48,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:35:48,512 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:48,535 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:35:48,535 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:35:48,536 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:35:48,536 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:35:48,559 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:48,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874957768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:48,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:48,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-06-05 04:35:48,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488193098] [2021-06-05 04:35:48,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:35:48,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:48,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:35:48,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:35:48,560 INFO L87 Difference]: Start difference. First operand 2280 states and 6506 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:49,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:49,171 INFO L93 Difference]: Finished difference Result 2473 states and 6877 transitions. [2021-06-05 04:35:49,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:35:49,171 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:35:49,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:49,174 INFO L225 Difference]: With dead ends: 2473 [2021-06-05 04:35:49,174 INFO L226 Difference]: Without dead ends: 2473 [2021-06-05 04:35:49,174 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 489.5ms TimeCoverageRelationStatistics Valid=131, Invalid=925, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:35:49,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2473 states. [2021-06-05 04:35:49,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2473 to 2275. [2021-06-05 04:35:49,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2275 states, 2274 states have (on average 2.8535620052770447) internal successors, (6489), 2274 states have internal predecessors, (6489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:49,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2275 states to 2275 states and 6489 transitions. [2021-06-05 04:35:49,198 INFO L78 Accepts]: Start accepts. Automaton has 2275 states and 6489 transitions. Word has length 19 [2021-06-05 04:35:49,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:49,199 INFO L482 AbstractCegarLoop]: Abstraction has 2275 states and 6489 transitions. [2021-06-05 04:35:49,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:49,199 INFO L276 IsEmpty]: Start isEmpty. Operand 2275 states and 6489 transitions. [2021-06-05 04:35:49,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:49,201 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:49,201 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:49,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 528 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4122 [2021-06-05 04:35:49,401 INFO L430 AbstractCegarLoop]: === Iteration 538 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:49,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:49,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1984999512, now seen corresponding path program 524 times [2021-06-05 04:35:49,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:49,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691837845] [2021-06-05 04:35:49,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:49,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:49,484 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:49,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:49,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691837845] [2021-06-05 04:35:49,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691837845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:49,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837786955] [2021-06-05 04:35:49,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:49,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:35:49,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:49,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:35:49,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:49,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:49,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:49,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:35:49,713 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:49,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:49,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:35:49,716 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:49,740 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:35:49,740 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:35:49,740 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:35:49,740 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:35:49,764 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:49,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837786955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:49,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:49,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-06-05 04:35:49,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576286567] [2021-06-05 04:35:49,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:35:49,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:49,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:35:49,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:35:49,764 INFO L87 Difference]: Start difference. First operand 2275 states and 6489 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:50,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:50,091 INFO L93 Difference]: Finished difference Result 2428 states and 6783 transitions. [2021-06-05 04:35:50,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:35:50,091 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:35:50,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:50,094 INFO L225 Difference]: With dead ends: 2428 [2021-06-05 04:35:50,094 INFO L226 Difference]: Without dead ends: 2428 [2021-06-05 04:35:50,094 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 233.6ms TimeCoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:35:50,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2428 states. [2021-06-05 04:35:50,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2428 to 2275. [2021-06-05 04:35:50,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2275 states, 2274 states have (on average 2.8535620052770447) internal successors, (6489), 2274 states have internal predecessors, (6489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:50,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2275 states to 2275 states and 6489 transitions. [2021-06-05 04:35:50,117 INFO L78 Accepts]: Start accepts. Automaton has 2275 states and 6489 transitions. Word has length 19 [2021-06-05 04:35:50,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:50,117 INFO L482 AbstractCegarLoop]: Abstraction has 2275 states and 6489 transitions. [2021-06-05 04:35:50,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:50,118 INFO L276 IsEmpty]: Start isEmpty. Operand 2275 states and 6489 transitions. [2021-06-05 04:35:50,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:50,120 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:50,120 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:50,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4125,529 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:50,320 INFO L430 AbstractCegarLoop]: === Iteration 539 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:50,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:50,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1246894460, now seen corresponding path program 525 times [2021-06-05 04:35:50,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:50,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564910440] [2021-06-05 04:35:50,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:50,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:50,404 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:35:50,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:50,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564910440] [2021-06-05 04:35:50,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564910440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:50,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276957858] [2021-06-05 04:35:50,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:50,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:35:50,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:50,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:35:50,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:50,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:50,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:50,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:35:50,587 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:50,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:50,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:50,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:35:50,590 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:50,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:50,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:50,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:35:50,594 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:50,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:50,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:35:50,597 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:50,633 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:35:50,633 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:35:50,633 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:35:50,633 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:35:50,703 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:50,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276957858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:50,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:50,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-06-05 04:35:50,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965864815] [2021-06-05 04:35:50,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:35:50,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:50,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:35:50,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:35:50,704 INFO L87 Difference]: Start difference. First operand 2275 states and 6489 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:51,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:51,135 INFO L93 Difference]: Finished difference Result 2340 states and 6592 transitions. [2021-06-05 04:35:51,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:35:51,135 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:35:51,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:51,137 INFO L225 Difference]: With dead ends: 2340 [2021-06-05 04:35:51,138 INFO L226 Difference]: Without dead ends: 2336 [2021-06-05 04:35:51,138 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 467.6ms TimeCoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:35:51,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2336 states. [2021-06-05 04:35:51,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2336 to 2271. [2021-06-05 04:35:51,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2271 states, 2270 states have (on average 2.8515418502202645) internal successors, (6473), 2270 states have internal predecessors, (6473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:51,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2271 states to 2271 states and 6473 transitions. [2021-06-05 04:35:51,160 INFO L78 Accepts]: Start accepts. Automaton has 2271 states and 6473 transitions. Word has length 19 [2021-06-05 04:35:51,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:51,160 INFO L482 AbstractCegarLoop]: Abstraction has 2271 states and 6473 transitions. [2021-06-05 04:35:51,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:51,160 INFO L276 IsEmpty]: Start isEmpty. Operand 2271 states and 6473 transitions. [2021-06-05 04:35:51,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:51,174 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:51,174 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:51,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4128,530 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:51,374 INFO L430 AbstractCegarLoop]: === Iteration 540 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:51,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:51,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1319025502, now seen corresponding path program 526 times [2021-06-05 04:35:51,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:51,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038318299] [2021-06-05 04:35:51,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:51,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:51,454 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:35:51,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:51,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038318299] [2021-06-05 04:35:51,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038318299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:51,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382533345] [2021-06-05 04:35:51,454 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:51,485 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:35:51,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:51,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:35:51,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:51,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:35:51,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:51,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:35:51,685 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:51,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:51,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:51,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:35:51,689 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:51,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:35:51,692 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:51,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:35:51,696 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:51,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:51,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:35:51,699 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:51,731 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-05 04:35:51,731 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:35:51,732 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:35:51,732 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-05 04:35:51,761 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:51,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382533345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:51,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:51,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-06-05 04:35:51,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612889446] [2021-06-05 04:35:51,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:35:51,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:51,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:35:51,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:35:51,762 INFO L87 Difference]: Start difference. First operand 2271 states and 6473 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:52,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:52,130 INFO L93 Difference]: Finished difference Result 2322 states and 6549 transitions. [2021-06-05 04:35:52,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:35:52,130 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:35:52,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:52,133 INFO L225 Difference]: With dead ends: 2322 [2021-06-05 04:35:52,133 INFO L226 Difference]: Without dead ends: 2314 [2021-06-05 04:35:52,133 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 393.8ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:35:52,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2021-06-05 04:35:52,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 2269. [2021-06-05 04:35:52,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2269 states, 2268 states have (on average 2.8465608465608465) internal successors, (6456), 2268 states have internal predecessors, (6456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:52,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2269 states to 2269 states and 6456 transitions. [2021-06-05 04:35:52,155 INFO L78 Accepts]: Start accepts. Automaton has 2269 states and 6456 transitions. Word has length 19 [2021-06-05 04:35:52,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:52,155 INFO L482 AbstractCegarLoop]: Abstraction has 2269 states and 6456 transitions. [2021-06-05 04:35:52,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:52,156 INFO L276 IsEmpty]: Start isEmpty. Operand 2269 states and 6456 transitions. [2021-06-05 04:35:52,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:52,158 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:52,158 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:52,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 531 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4134 [2021-06-05 04:35:52,358 INFO L430 AbstractCegarLoop]: === Iteration 541 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:52,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:52,358 INFO L82 PathProgramCache]: Analyzing trace with hash 741834300, now seen corresponding path program 527 times [2021-06-05 04:35:52,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:52,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106860948] [2021-06-05 04:35:52,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:52,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:52,431 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:35:52,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:52,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106860948] [2021-06-05 04:35:52,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106860948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:52,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345933209] [2021-06-05 04:35:52,431 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:52,461 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:35:52,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:52,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:35:52,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:52,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:35:52,666 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:52,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:35:52,669 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:52,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:52,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:52,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:35:52,673 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:52,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:35:52,676 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:52,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:35:52,679 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:52,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:52,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:35:52,683 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:52,715 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-05 04:35:52,715 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:35:52,716 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:35:52,716 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-05 04:35:52,746 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:52,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345933209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:52,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:52,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-06-05 04:35:52,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696972401] [2021-06-05 04:35:52,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:35:52,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:52,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:35:52,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:35:52,747 INFO L87 Difference]: Start difference. First operand 2269 states and 6456 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:53,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:53,203 INFO L93 Difference]: Finished difference Result 2304 states and 6506 transitions. [2021-06-05 04:35:53,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:35:53,203 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:35:53,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:53,206 INFO L225 Difference]: With dead ends: 2304 [2021-06-05 04:35:53,206 INFO L226 Difference]: Without dead ends: 2292 [2021-06-05 04:35:53,206 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 375.4ms TimeCoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:35:53,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2292 states. [2021-06-05 04:35:53,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2292 to 2265. [2021-06-05 04:35:53,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2265 states, 2264 states have (on average 2.8445229681978796) internal successors, (6440), 2264 states have internal predecessors, (6440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:53,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2265 states to 2265 states and 6440 transitions. [2021-06-05 04:35:53,227 INFO L78 Accepts]: Start accepts. Automaton has 2265 states and 6440 transitions. Word has length 19 [2021-06-05 04:35:53,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:53,227 INFO L482 AbstractCegarLoop]: Abstraction has 2265 states and 6440 transitions. [2021-06-05 04:35:53,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:53,227 INFO L276 IsEmpty]: Start isEmpty. Operand 2265 states and 6440 transitions. [2021-06-05 04:35:53,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:53,229 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:53,229 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:53,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 532 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4141 [2021-06-05 04:35:53,430 INFO L430 AbstractCegarLoop]: === Iteration 542 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:53,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:53,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1011819174, now seen corresponding path program 528 times [2021-06-05 04:35:53,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:53,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871895667] [2021-06-05 04:35:53,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:53,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:53,552 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:53,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:53,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871895667] [2021-06-05 04:35:53,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871895667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:53,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165706663] [2021-06-05 04:35:53,552 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:53,582 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:35:53,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:53,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:35:53,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:53,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:53,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:53,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:35:53,758 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:53,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:53,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:53,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:35:53,761 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:53,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:53,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:53,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:35:53,765 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:53,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:53,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:35:53,768 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:53,804 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:35:53,804 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:35:53,804 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:35:53,804 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:35:53,864 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:53,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165706663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:53,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:53,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 04:35:53,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457066160] [2021-06-05 04:35:53,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:35:53,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:53,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:35:53,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:35:53,865 INFO L87 Difference]: Start difference. First operand 2265 states and 6440 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:54,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:54,430 INFO L93 Difference]: Finished difference Result 2498 states and 6887 transitions. [2021-06-05 04:35:54,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:35:54,430 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:35:54,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:54,433 INFO L225 Difference]: With dead ends: 2498 [2021-06-05 04:35:54,433 INFO L226 Difference]: Without dead ends: 2498 [2021-06-05 04:35:54,433 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 539.4ms TimeCoverageRelationStatistics Valid=120, Invalid=810, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:35:54,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2498 states. [2021-06-05 04:35:54,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2498 to 2300. [2021-06-05 04:35:54,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2300 states, 2299 states have (on average 2.854284471509352) internal successors, (6562), 2299 states have internal predecessors, (6562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:54,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2300 states to 2300 states and 6562 transitions. [2021-06-05 04:35:54,466 INFO L78 Accepts]: Start accepts. Automaton has 2300 states and 6562 transitions. Word has length 19 [2021-06-05 04:35:54,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:54,466 INFO L482 AbstractCegarLoop]: Abstraction has 2300 states and 6562 transitions. [2021-06-05 04:35:54,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:54,466 INFO L276 IsEmpty]: Start isEmpty. Operand 2300 states and 6562 transitions. [2021-06-05 04:35:54,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:54,468 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:54,468 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:54,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4148,533 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:54,669 INFO L430 AbstractCegarLoop]: === Iteration 543 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:54,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:54,669 INFO L82 PathProgramCache]: Analyzing trace with hash -210202946, now seen corresponding path program 529 times [2021-06-05 04:35:54,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:54,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849402610] [2021-06-05 04:35:54,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:54,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:54,779 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:54,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:54,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849402610] [2021-06-05 04:35:54,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849402610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:54,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442098598] [2021-06-05 04:35:54,779 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:54,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:54,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:35:54,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:54,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:54,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:54,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:35:54,976 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:54,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:54,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:54,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:35:54,979 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:54,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:54,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:54,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:35:54,983 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:54,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:54,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:35:54,986 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:55,021 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:35:55,021 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:35:55,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:35:55,022 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:35:55,099 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:55,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442098598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:55,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:55,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 04:35:55,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664919089] [2021-06-05 04:35:55,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:35:55,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:55,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:35:55,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:35:55,100 INFO L87 Difference]: Start difference. First operand 2300 states and 6562 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:56,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:56,197 INFO L93 Difference]: Finished difference Result 2556 states and 7084 transitions. [2021-06-05 04:35:56,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 04:35:56,198 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:35:56,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:56,200 INFO L225 Difference]: With dead ends: 2556 [2021-06-05 04:35:56,200 INFO L226 Difference]: Without dead ends: 2546 [2021-06-05 04:35:56,200 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 854.1ms TimeCoverageRelationStatistics Valid=195, Invalid=1697, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 04:35:56,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2546 states. [2021-06-05 04:35:56,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2546 to 2360. [2021-06-05 04:35:56,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2360 states, 2359 states have (on average 2.8660449342941923) internal successors, (6761), 2359 states have internal predecessors, (6761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:56,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2360 states to 2360 states and 6761 transitions. [2021-06-05 04:35:56,224 INFO L78 Accepts]: Start accepts. Automaton has 2360 states and 6761 transitions. Word has length 19 [2021-06-05 04:35:56,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:56,224 INFO L482 AbstractCegarLoop]: Abstraction has 2360 states and 6761 transitions. [2021-06-05 04:35:56,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:56,224 INFO L276 IsEmpty]: Start isEmpty. Operand 2360 states and 6761 transitions. [2021-06-05 04:35:56,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:56,226 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:56,226 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:56,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4152,534 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:56,427 INFO L430 AbstractCegarLoop]: === Iteration 544 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:56,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:56,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1508140760, now seen corresponding path program 530 times [2021-06-05 04:35:56,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:56,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175844914] [2021-06-05 04:35:56,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:56,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:56,538 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:56,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:56,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175844914] [2021-06-05 04:35:56,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175844914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:56,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998638393] [2021-06-05 04:35:56,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:56,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:35:56,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:56,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:35:56,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:56,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:56,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:56,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:35:56,738 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:56,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:56,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:56,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:35:56,742 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:56,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:56,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:56,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:35:56,745 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:56,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:56,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:35:56,748 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:56,783 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:35:56,784 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:35:56,784 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:35:56,784 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:35:56,840 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:56,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998638393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:56,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:56,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 04:35:56,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091989598] [2021-06-05 04:35:56,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:35:56,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:56,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:35:56,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:35:56,840 INFO L87 Difference]: Start difference. First operand 2360 states and 6761 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:57,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:57,474 INFO L93 Difference]: Finished difference Result 2526 states and 7034 transitions. [2021-06-05 04:35:57,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:35:57,475 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:35:57,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:57,477 INFO L225 Difference]: With dead ends: 2526 [2021-06-05 04:35:57,477 INFO L226 Difference]: Without dead ends: 2526 [2021-06-05 04:35:57,477 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 557.3ms TimeCoverageRelationStatistics Valid=139, Invalid=983, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 04:35:57,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2526 states. [2021-06-05 04:35:57,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2526 to 2352. [2021-06-05 04:35:57,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2352 states, 2351 states have (on average 2.858358145470013) internal successors, (6720), 2351 states have internal predecessors, (6720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:57,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2352 states to 2352 states and 6720 transitions. [2021-06-05 04:35:57,519 INFO L78 Accepts]: Start accepts. Automaton has 2352 states and 6720 transitions. Word has length 19 [2021-06-05 04:35:57,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:57,519 INFO L482 AbstractCegarLoop]: Abstraction has 2352 states and 6720 transitions. [2021-06-05 04:35:57,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:57,519 INFO L276 IsEmpty]: Start isEmpty. Operand 2352 states and 6720 transitions. [2021-06-05 04:35:57,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:57,521 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:57,521 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:57,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4157,535 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:57,722 INFO L430 AbstractCegarLoop]: === Iteration 545 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:57,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:57,722 INFO L82 PathProgramCache]: Analyzing trace with hash -202472548, now seen corresponding path program 531 times [2021-06-05 04:35:57,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:57,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565778637] [2021-06-05 04:35:57,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:57,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:57,825 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:57,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:57,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565778637] [2021-06-05 04:35:57,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565778637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:57,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869479682] [2021-06-05 04:35:57,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:57,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:35:57,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:57,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:35:57,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:58,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:58,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:58,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:35:58,054 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:58,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:58,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:35:58,057 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:58,081 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:35:58,081 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:35:58,082 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:35:58,082 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:35:58,105 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:58,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869479682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:58,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:58,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 04:35:58,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862268208] [2021-06-05 04:35:58,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:35:58,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:58,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:35:58,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:35:58,106 INFO L87 Difference]: Start difference. First operand 2352 states and 6720 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:58,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:35:58,973 INFO L93 Difference]: Finished difference Result 2641 states and 7272 transitions. [2021-06-05 04:35:58,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 04:35:58,973 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:35:58,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:35:58,975 INFO L225 Difference]: With dead ends: 2641 [2021-06-05 04:35:58,976 INFO L226 Difference]: Without dead ends: 2641 [2021-06-05 04:35:58,976 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 672.6ms TimeCoverageRelationStatistics Valid=190, Invalid=1532, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 04:35:58,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2641 states. [2021-06-05 04:35:58,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2641 to 2356. [2021-06-05 04:35:58,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2356 states, 2355 states have (on average 2.860297239915074) internal successors, (6736), 2355 states have internal predecessors, (6736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:59,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2356 states to 2356 states and 6736 transitions. [2021-06-05 04:35:59,000 INFO L78 Accepts]: Start accepts. Automaton has 2356 states and 6736 transitions. Word has length 19 [2021-06-05 04:35:59,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:35:59,000 INFO L482 AbstractCegarLoop]: Abstraction has 2356 states and 6736 transitions. [2021-06-05 04:35:59,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:35:59,000 INFO L276 IsEmpty]: Start isEmpty. Operand 2356 states and 6736 transitions. [2021-06-05 04:35:59,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:35:59,002 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:35:59,002 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:35:59,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 536 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4161 [2021-06-05 04:35:59,203 INFO L430 AbstractCegarLoop]: === Iteration 546 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:35:59,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:35:59,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1691877544, now seen corresponding path program 532 times [2021-06-05 04:35:59,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:35:59,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585043329] [2021-06-05 04:35:59,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:35:59,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:35:59,324 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:59,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:35:59,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585043329] [2021-06-05 04:35:59,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585043329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:59,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114450378] [2021-06-05 04:35:59,325 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:35:59,354 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:35:59,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:35:59,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:35:59,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:35:59,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:59,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:59,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:35:59,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:59,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:35:59,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:35:59,555 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:35:59,578 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:35:59,579 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:35:59,579 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:35:59,579 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:35:59,603 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:35:59,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114450378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:35:59,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:35:59,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 04:35:59,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915577074] [2021-06-05 04:35:59,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:35:59,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:35:59,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:35:59,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:35:59,604 INFO L87 Difference]: Start difference. First operand 2356 states and 6736 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:00,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:00,769 INFO L93 Difference]: Finished difference Result 2652 states and 7285 transitions. [2021-06-05 04:36:00,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 04:36:00,770 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:36:00,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:00,772 INFO L225 Difference]: With dead ends: 2652 [2021-06-05 04:36:00,772 INFO L226 Difference]: Without dead ends: 2652 [2021-06-05 04:36:00,772 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 992.9ms TimeCoverageRelationStatistics Valid=288, Invalid=2262, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 04:36:00,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2652 states. [2021-06-05 04:36:00,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2652 to 2337. [2021-06-05 04:36:00,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2337 states, 2336 states have (on average 2.855736301369863) internal successors, (6671), 2336 states have internal predecessors, (6671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:00,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2337 states to 2337 states and 6671 transitions. [2021-06-05 04:36:00,794 INFO L78 Accepts]: Start accepts. Automaton has 2337 states and 6671 transitions. Word has length 19 [2021-06-05 04:36:00,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:00,794 INFO L482 AbstractCegarLoop]: Abstraction has 2337 states and 6671 transitions. [2021-06-05 04:36:00,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:00,795 INFO L276 IsEmpty]: Start isEmpty. Operand 2337 states and 6671 transitions. [2021-06-05 04:36:00,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:00,797 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:00,797 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:00,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 537 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4164 [2021-06-05 04:36:00,997 INFO L430 AbstractCegarLoop]: === Iteration 547 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:00,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:00,997 INFO L82 PathProgramCache]: Analyzing trace with hash -618792164, now seen corresponding path program 533 times [2021-06-05 04:36:00,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:00,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746555676] [2021-06-05 04:36:00,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:01,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:01,092 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:01,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:01,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746555676] [2021-06-05 04:36:01,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746555676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:01,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530748082] [2021-06-05 04:36:01,092 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:01,122 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:36:01,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:01,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:36:01,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:01,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:01,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:01,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:36:01,318 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:01,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:01,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:36:01,321 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:01,344 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:36:01,345 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:36:01,345 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:36:01,345 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:36:01,370 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:01,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530748082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:01,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:01,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 04:36:01,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352201013] [2021-06-05 04:36:01,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:36:01,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:01,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:36:01,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:36:01,370 INFO L87 Difference]: Start difference. First operand 2337 states and 6671 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:01,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:01,807 INFO L93 Difference]: Finished difference Result 2469 states and 6898 transitions. [2021-06-05 04:36:01,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:36:01,807 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:36:01,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:01,809 INFO L225 Difference]: With dead ends: 2469 [2021-06-05 04:36:01,810 INFO L226 Difference]: Without dead ends: 2469 [2021-06-05 04:36:01,810 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 255.2ms TimeCoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:36:01,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2469 states. [2021-06-05 04:36:01,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2469 to 2337. [2021-06-05 04:36:01,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2337 states, 2336 states have (on average 2.855736301369863) internal successors, (6671), 2336 states have internal predecessors, (6671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:01,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2337 states to 2337 states and 6671 transitions. [2021-06-05 04:36:01,832 INFO L78 Accepts]: Start accepts. Automaton has 2337 states and 6671 transitions. Word has length 19 [2021-06-05 04:36:01,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:01,832 INFO L482 AbstractCegarLoop]: Abstraction has 2337 states and 6671 transitions. [2021-06-05 04:36:01,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:01,833 INFO L276 IsEmpty]: Start isEmpty. Operand 2337 states and 6671 transitions. [2021-06-05 04:36:01,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:01,835 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:01,835 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:02,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 538 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4167 [2021-06-05 04:36:02,035 INFO L430 AbstractCegarLoop]: === Iteration 548 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:02,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:02,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1288759676, now seen corresponding path program 534 times [2021-06-05 04:36:02,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:02,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263959053] [2021-06-05 04:36:02,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:02,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:02,131 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:36:02,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:02,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263959053] [2021-06-05 04:36:02,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263959053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:02,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308011435] [2021-06-05 04:36:02,132 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:02,160 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:36:02,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:02,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:36:02,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:02,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:02,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:02,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:36:02,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:02,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:02,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:02,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:36:02,328 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:02,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:02,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:02,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:36:02,332 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:02,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:02,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:36:02,335 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:02,383 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:36:02,384 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:36:02,384 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:36:02,384 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:36:02,452 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:02,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308011435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:02,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:02,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-06-05 04:36:02,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098218836] [2021-06-05 04:36:02,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:36:02,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:02,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:36:02,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:36:02,453 INFO L87 Difference]: Start difference. First operand 2337 states and 6671 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:02,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:02,893 INFO L93 Difference]: Finished difference Result 2411 states and 6789 transitions. [2021-06-05 04:36:02,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:36:02,894 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:36:02,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:02,896 INFO L225 Difference]: With dead ends: 2411 [2021-06-05 04:36:02,896 INFO L226 Difference]: Without dead ends: 2407 [2021-06-05 04:36:02,896 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 465.4ms TimeCoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:36:02,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2407 states. [2021-06-05 04:36:02,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2407 to 2331. [2021-06-05 04:36:02,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 2330 states have (on average 2.853648068669528) internal successors, (6649), 2330 states have internal predecessors, (6649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:02,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 6649 transitions. [2021-06-05 04:36:02,918 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 6649 transitions. Word has length 19 [2021-06-05 04:36:02,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:02,918 INFO L482 AbstractCegarLoop]: Abstraction has 2331 states and 6649 transitions. [2021-06-05 04:36:02,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:02,918 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 6649 transitions. [2021-06-05 04:36:02,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:02,920 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:02,921 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:03,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4170,539 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:03,121 INFO L430 AbstractCegarLoop]: === Iteration 549 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:03,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:03,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1277160286, now seen corresponding path program 535 times [2021-06-05 04:36:03,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:03,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504339259] [2021-06-05 04:36:03,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:03,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:03,213 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:36:03,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:03,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504339259] [2021-06-05 04:36:03,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504339259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:03,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363152117] [2021-06-05 04:36:03,213 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:03,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:03,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:36:03,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:03,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:36:03,462 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:03,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:36:03,466 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:03,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:03,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:03,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:36:03,474 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:03,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:36:03,478 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:03,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:36:03,482 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:03,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:03,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:36:03,487 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:03,523 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-05 04:36:03,524 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:36:03,525 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:36:03,525 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-05 04:36:03,576 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:03,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363152117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:03,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:03,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-06-05 04:36:03,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467274703] [2021-06-05 04:36:03,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:36:03,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:03,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:36:03,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:36:03,577 INFO L87 Difference]: Start difference. First operand 2331 states and 6649 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:04,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:04,163 INFO L93 Difference]: Finished difference Result 2382 states and 6723 transitions. [2021-06-05 04:36:04,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:36:04,163 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:36:04,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:04,166 INFO L225 Difference]: With dead ends: 2382 [2021-06-05 04:36:04,166 INFO L226 Difference]: Without dead ends: 2374 [2021-06-05 04:36:04,166 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 548.2ms TimeCoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:36:04,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2374 states. [2021-06-05 04:36:04,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2374 to 2328. [2021-06-05 04:36:04,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2328 states, 2327 states have (on average 2.84959174903309) internal successors, (6631), 2327 states have internal predecessors, (6631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:04,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2328 states to 2328 states and 6631 transitions. [2021-06-05 04:36:04,187 INFO L78 Accepts]: Start accepts. Automaton has 2328 states and 6631 transitions. Word has length 19 [2021-06-05 04:36:04,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:04,187 INFO L482 AbstractCegarLoop]: Abstraction has 2328 states and 6631 transitions. [2021-06-05 04:36:04,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:04,187 INFO L276 IsEmpty]: Start isEmpty. Operand 2328 states and 6631 transitions. [2021-06-05 04:36:04,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:04,189 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:04,189 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:04,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4176,540 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:04,389 INFO L430 AbstractCegarLoop]: === Iteration 550 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:04,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:04,390 INFO L82 PathProgramCache]: Analyzing trace with hash 783699516, now seen corresponding path program 536 times [2021-06-05 04:36:04,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:04,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935901843] [2021-06-05 04:36:04,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:04,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:04,472 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:36:04,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:04,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935901843] [2021-06-05 04:36:04,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935901843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:04,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430137485] [2021-06-05 04:36:04,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:04,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:36:04,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:04,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:36:04,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:04,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:36:04,718 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:04,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:36:04,721 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:04,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:04,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:04,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:36:04,725 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:04,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:36:04,728 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:04,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:36:04,731 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:04,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:04,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:36:04,735 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:04,766 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-05 04:36:04,766 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:36:04,767 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:36:04,767 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-05 04:36:04,797 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:04,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430137485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:04,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:04,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-06-05 04:36:04,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314248162] [2021-06-05 04:36:04,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:36:04,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:04,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:36:04,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:36:04,798 INFO L87 Difference]: Start difference. First operand 2328 states and 6631 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:05,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:05,254 INFO L93 Difference]: Finished difference Result 2381 states and 6708 transitions. [2021-06-05 04:36:05,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:36:05,254 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:36:05,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:05,257 INFO L225 Difference]: With dead ends: 2381 [2021-06-05 04:36:05,257 INFO L226 Difference]: Without dead ends: 2369 [2021-06-05 04:36:05,257 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 439.4ms TimeCoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:36:05,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2369 states. [2021-06-05 04:36:05,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2369 to 2328. [2021-06-05 04:36:05,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2328 states, 2327 states have (on average 2.842286205414697) internal successors, (6614), 2327 states have internal predecessors, (6614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:05,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2328 states to 2328 states and 6614 transitions. [2021-06-05 04:36:05,280 INFO L78 Accepts]: Start accepts. Automaton has 2328 states and 6614 transitions. Word has length 19 [2021-06-05 04:36:05,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:05,280 INFO L482 AbstractCegarLoop]: Abstraction has 2328 states and 6614 transitions. [2021-06-05 04:36:05,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:05,280 INFO L276 IsEmpty]: Start isEmpty. Operand 2328 states and 6614 transitions. [2021-06-05 04:36:05,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:05,282 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:05,282 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:05,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 541 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4183 [2021-06-05 04:36:05,483 INFO L430 AbstractCegarLoop]: === Iteration 551 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:05,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:05,483 INFO L82 PathProgramCache]: Analyzing trace with hash 245843938, now seen corresponding path program 537 times [2021-06-05 04:36:05,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:05,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129897953] [2021-06-05 04:36:05,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:05,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:05,585 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:36:05,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:05,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129897953] [2021-06-05 04:36:05,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129897953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:05,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322023907] [2021-06-05 04:36:05,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:05,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:36:05,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:05,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:36:05,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:05,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:36:05,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:05,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:36:05,867 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:05,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:05,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:05,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:36:05,886 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:05,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:36:05,891 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:05,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:36:05,895 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:05,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:05,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:36:05,900 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:05,937 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-05 04:36:05,938 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:36:05,939 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:36:05,939 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-05 04:36:05,976 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:05,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322023907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:05,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:05,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-06-05 04:36:05,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887314411] [2021-06-05 04:36:05,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:36:05,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:05,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:36:05,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:36:05,977 INFO L87 Difference]: Start difference. First operand 2328 states and 6614 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:06,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:06,453 INFO L93 Difference]: Finished difference Result 2369 states and 6671 transitions. [2021-06-05 04:36:06,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:36:06,453 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:36:06,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:06,455 INFO L225 Difference]: With dead ends: 2369 [2021-06-05 04:36:06,456 INFO L226 Difference]: Without dead ends: 2353 [2021-06-05 04:36:06,456 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 484.6ms TimeCoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:36:06,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2353 states. [2021-06-05 04:36:06,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2353 to 2328. [2021-06-05 04:36:06,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2328 states, 2327 states have (on average 2.839278040395359) internal successors, (6607), 2327 states have internal predecessors, (6607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:06,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2328 states to 2328 states and 6607 transitions. [2021-06-05 04:36:06,477 INFO L78 Accepts]: Start accepts. Automaton has 2328 states and 6607 transitions. Word has length 19 [2021-06-05 04:36:06,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:06,478 INFO L482 AbstractCegarLoop]: Abstraction has 2328 states and 6607 transitions. [2021-06-05 04:36:06,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:06,478 INFO L276 IsEmpty]: Start isEmpty. Operand 2328 states and 6607 transitions. [2021-06-05 04:36:06,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:06,480 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:06,480 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:06,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4190,542 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:06,680 INFO L430 AbstractCegarLoop]: === Iteration 552 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:06,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:06,681 INFO L82 PathProgramCache]: Analyzing trace with hash 969109082, now seen corresponding path program 538 times [2021-06-05 04:36:06,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:06,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893221223] [2021-06-05 04:36:06,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:06,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:06,865 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:06,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:06,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893221223] [2021-06-05 04:36:06,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893221223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:06,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509736132] [2021-06-05 04:36:06,865 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:06,902 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:36:06,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:06,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:36:06,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:07,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:07,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:07,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:36:07,152 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:07,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:07,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:07,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:36:07,156 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:07,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:07,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:07,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:36:07,160 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:07,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:07,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:36:07,164 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:07,205 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:36:07,205 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:36:07,206 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:36:07,206 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:36:07,277 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:07,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509736132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:07,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:07,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 04:36:07,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072917618] [2021-06-05 04:36:07,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:36:07,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:07,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:36:07,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:36:07,278 INFO L87 Difference]: Start difference. First operand 2328 states and 6607 transitions. Second operand has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:07,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:07,701 INFO L93 Difference]: Finished difference Result 2501 states and 6942 transitions. [2021-06-05 04:36:07,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:36:07,701 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:36:07,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:07,704 INFO L225 Difference]: With dead ends: 2501 [2021-06-05 04:36:07,704 INFO L226 Difference]: Without dead ends: 2501 [2021-06-05 04:36:07,704 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 568.7ms TimeCoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:36:07,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2501 states. [2021-06-05 04:36:07,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2501 to 2355. [2021-06-05 04:36:07,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2355 states, 2354 states have (on average 2.846644010195412) internal successors, (6701), 2354 states have internal predecessors, (6701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:07,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2355 states to 2355 states and 6701 transitions. [2021-06-05 04:36:07,729 INFO L78 Accepts]: Start accepts. Automaton has 2355 states and 6701 transitions. Word has length 19 [2021-06-05 04:36:07,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:07,729 INFO L482 AbstractCegarLoop]: Abstraction has 2355 states and 6701 transitions. [2021-06-05 04:36:07,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:07,729 INFO L276 IsEmpty]: Start isEmpty. Operand 2355 states and 6701 transitions. [2021-06-05 04:36:07,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:07,731 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:07,731 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:07,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 543 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4197 [2021-06-05 04:36:07,932 INFO L430 AbstractCegarLoop]: === Iteration 553 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:07,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:07,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1770725310, now seen corresponding path program 539 times [2021-06-05 04:36:07,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:07,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056471987] [2021-06-05 04:36:07,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:07,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:08,210 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:08,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:08,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056471987] [2021-06-05 04:36:08,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056471987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:08,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156783138] [2021-06-05 04:36:08,211 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:08,290 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:36:08,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:08,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:36:08,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:08,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:08,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:08,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:36:08,647 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:08,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:08,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:08,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:36:08,651 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:08,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:08,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:08,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:36:08,669 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:08,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:08,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:36:08,673 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:08,727 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:36:08,727 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:36:08,728 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:36:08,728 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:36:08,836 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:08,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156783138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:08,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:08,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 04:36:08,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839975993] [2021-06-05 04:36:08,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:36:08,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:08,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:36:08,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:36:08,837 INFO L87 Difference]: Start difference. First operand 2355 states and 6701 transitions. Second operand has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:10,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:10,359 INFO L93 Difference]: Finished difference Result 2540 states and 7010 transitions. [2021-06-05 04:36:10,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 04:36:10,360 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:36:10,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:10,362 INFO L225 Difference]: With dead ends: 2540 [2021-06-05 04:36:10,362 INFO L226 Difference]: Without dead ends: 2528 [2021-06-05 04:36:10,362 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 1631.2ms TimeCoverageRelationStatistics Valid=230, Invalid=2026, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 04:36:10,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2528 states. [2021-06-05 04:36:10,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2528 to 2365. [2021-06-05 04:36:10,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2365 states, 2364 states have (on average 2.8468697123519457) internal successors, (6730), 2364 states have internal predecessors, (6730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:10,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2365 states to 2365 states and 6730 transitions. [2021-06-05 04:36:10,386 INFO L78 Accepts]: Start accepts. Automaton has 2365 states and 6730 transitions. Word has length 19 [2021-06-05 04:36:10,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:10,387 INFO L482 AbstractCegarLoop]: Abstraction has 2365 states and 6730 transitions. [2021-06-05 04:36:10,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:10,387 INFO L276 IsEmpty]: Start isEmpty. Operand 2365 states and 6730 transitions. [2021-06-05 04:36:10,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:10,389 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:10,389 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:10,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4201,544 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:10,589 INFO L430 AbstractCegarLoop]: === Iteration 554 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:10,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:10,590 INFO L82 PathProgramCache]: Analyzing trace with hash -805898280, now seen corresponding path program 540 times [2021-06-05 04:36:10,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:10,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160728316] [2021-06-05 04:36:10,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:10,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:10,744 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:10,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:10,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160728316] [2021-06-05 04:36:10,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160728316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:10,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587964307] [2021-06-05 04:36:10,745 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:10,783 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:36:10,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:10,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:36:10,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:11,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:11,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:11,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:36:11,033 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:11,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:11,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:11,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:36:11,038 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:11,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:11,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:11,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:36:11,042 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:11,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:11,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:36:11,045 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:11,087 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:36:11,087 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:36:11,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:36:11,088 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:36:11,155 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:11,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587964307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:11,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:11,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 04:36:11,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537466158] [2021-06-05 04:36:11,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:36:11,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:11,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:36:11,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:36:11,156 INFO L87 Difference]: Start difference. First operand 2365 states and 6730 transitions. Second operand has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:11,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:11,871 INFO L93 Difference]: Finished difference Result 2512 states and 6967 transitions. [2021-06-05 04:36:11,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:36:11,872 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:36:11,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:11,874 INFO L225 Difference]: With dead ends: 2512 [2021-06-05 04:36:11,874 INFO L226 Difference]: Without dead ends: 2512 [2021-06-05 04:36:11,874 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 822.0ms TimeCoverageRelationStatistics Valid=184, Invalid=1298, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 04:36:11,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2512 states. [2021-06-05 04:36:11,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2512 to 2364. [2021-06-05 04:36:11,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2364 states, 2363 states have (on average 2.8404570461278036) internal successors, (6712), 2363 states have internal predecessors, (6712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:11,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2364 states to 2364 states and 6712 transitions. [2021-06-05 04:36:11,897 INFO L78 Accepts]: Start accepts. Automaton has 2364 states and 6712 transitions. Word has length 19 [2021-06-05 04:36:11,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:11,897 INFO L482 AbstractCegarLoop]: Abstraction has 2364 states and 6712 transitions. [2021-06-05 04:36:11,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:11,897 INFO L276 IsEmpty]: Start isEmpty. Operand 2364 states and 6712 transitions. [2021-06-05 04:36:11,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:11,899 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:11,899 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:12,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 545 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4206 [2021-06-05 04:36:12,099 INFO L430 AbstractCegarLoop]: === Iteration 555 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:12,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:12,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1778455708, now seen corresponding path program 541 times [2021-06-05 04:36:12,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:12,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597322686] [2021-06-05 04:36:12,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:12,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:12,246 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:12,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:12,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597322686] [2021-06-05 04:36:12,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597322686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:12,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187899809] [2021-06-05 04:36:12,246 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:12,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:12,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:36:12,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:12,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:12,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:12,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:36:12,576 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:12,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:12,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:36:12,580 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:12,608 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:36:12,608 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:36:12,609 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:36:12,609 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:36:12,638 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:12,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187899809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:12,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:12,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 04:36:12,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986074019] [2021-06-05 04:36:12,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:36:12,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:12,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:36:12,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:36:12,639 INFO L87 Difference]: Start difference. First operand 2364 states and 6712 transitions. Second operand has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:14,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:14,063 INFO L93 Difference]: Finished difference Result 2649 states and 7227 transitions. [2021-06-05 04:36:14,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 04:36:14,064 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:36:14,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:14,067 INFO L225 Difference]: With dead ends: 2649 [2021-06-05 04:36:14,067 INFO L226 Difference]: Without dead ends: 2649 [2021-06-05 04:36:14,067 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 1138.0ms TimeCoverageRelationStatistics Valid=246, Invalid=2204, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 04:36:14,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2649 states. [2021-06-05 04:36:14,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2649 to 2368. [2021-06-05 04:36:14,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2368 states, 2367 states have (on average 2.841571609632446) internal successors, (6726), 2367 states have internal predecessors, (6726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:14,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2368 states to 2368 states and 6726 transitions. [2021-06-05 04:36:14,102 INFO L78 Accepts]: Start accepts. Automaton has 2368 states and 6726 transitions. Word has length 19 [2021-06-05 04:36:14,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:14,103 INFO L482 AbstractCegarLoop]: Abstraction has 2368 states and 6726 transitions. [2021-06-05 04:36:14,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:14,103 INFO L276 IsEmpty]: Start isEmpty. Operand 2368 states and 6726 transitions. [2021-06-05 04:36:14,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:14,106 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:14,106 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:14,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 546 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4210 [2021-06-05 04:36:14,323 INFO L430 AbstractCegarLoop]: === Iteration 556 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:14,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:14,324 INFO L82 PathProgramCache]: Analyzing trace with hash 289050712, now seen corresponding path program 542 times [2021-06-05 04:36:14,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:14,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258818307] [2021-06-05 04:36:14,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:14,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:14,460 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:14,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:14,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258818307] [2021-06-05 04:36:14,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258818307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:14,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139623062] [2021-06-05 04:36:14,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:14,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:36:14,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:14,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:36:14,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:14,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:14,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:14,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:36:14,791 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:14,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:14,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:36:14,795 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:14,823 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:36:14,824 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:36:14,824 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:36:14,825 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:36:14,855 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:14,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139623062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:14,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:14,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 04:36:14,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314827645] [2021-06-05 04:36:14,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:36:14,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:14,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:36:14,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:36:14,856 INFO L87 Difference]: Start difference. First operand 2368 states and 6726 transitions. Second operand has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:17,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:17,008 INFO L93 Difference]: Finished difference Result 2832 states and 7583 transitions. [2021-06-05 04:36:17,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 04:36:17,008 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:36:17,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:17,011 INFO L225 Difference]: With dead ends: 2832 [2021-06-05 04:36:17,011 INFO L226 Difference]: Without dead ends: 2832 [2021-06-05 04:36:17,012 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1666 ImplicationChecksByTransitivity, 1674.8ms TimeCoverageRelationStatistics Valid=486, Invalid=4770, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 04:36:17,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2832 states. [2021-06-05 04:36:17,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2832 to 2369. [2021-06-05 04:36:17,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2369 states, 2368 states have (on average 2.845439189189189) internal successors, (6738), 2368 states have internal predecessors, (6738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:17,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2369 states to 2369 states and 6738 transitions. [2021-06-05 04:36:17,037 INFO L78 Accepts]: Start accepts. Automaton has 2369 states and 6738 transitions. Word has length 19 [2021-06-05 04:36:17,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:17,037 INFO L482 AbstractCegarLoop]: Abstraction has 2369 states and 6738 transitions. [2021-06-05 04:36:17,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:17,037 INFO L276 IsEmpty]: Start isEmpty. Operand 2369 states and 6738 transitions. [2021-06-05 04:36:17,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:17,039 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:17,039 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:17,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4213,547 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:17,239 INFO L430 AbstractCegarLoop]: === Iteration 557 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:17,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:17,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1362136092, now seen corresponding path program 543 times [2021-06-05 04:36:17,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:17,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292337286] [2021-06-05 04:36:17,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:17,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:17,349 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:17,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:17,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292337286] [2021-06-05 04:36:17,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292337286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:17,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982771120] [2021-06-05 04:36:17,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:17,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:36:17,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:17,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:36:17,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:17,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:17,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:17,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:36:17,610 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:17,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:17,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:36:17,613 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:17,636 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:36:17,636 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:36:17,637 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:36:17,637 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:36:17,662 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:17,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982771120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:17,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:17,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 04:36:17,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611355288] [2021-06-05 04:36:17,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:36:17,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:17,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:36:17,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:36:17,663 INFO L87 Difference]: Start difference. First operand 2369 states and 6738 transitions. Second operand has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:20,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:20,422 INFO L93 Difference]: Finished difference Result 2708 states and 7362 transitions. [2021-06-05 04:36:20,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-06-05 04:36:20,422 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:36:20,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:20,425 INFO L225 Difference]: With dead ends: 2708 [2021-06-05 04:36:20,425 INFO L226 Difference]: Without dead ends: 2708 [2021-06-05 04:36:20,425 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2545 ImplicationChecksByTransitivity, 2195.2ms TimeCoverageRelationStatistics Valid=764, Invalid=7068, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 04:36:20,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2708 states. [2021-06-05 04:36:20,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2708 to 2346. [2021-06-05 04:36:20,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2346 states, 2345 states have (on average 2.8388059701492536) internal successors, (6657), 2345 states have internal predecessors, (6657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:20,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2346 states to 2346 states and 6657 transitions. [2021-06-05 04:36:20,447 INFO L78 Accepts]: Start accepts. Automaton has 2346 states and 6657 transitions. Word has length 19 [2021-06-05 04:36:20,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:20,448 INFO L482 AbstractCegarLoop]: Abstraction has 2346 states and 6657 transitions. [2021-06-05 04:36:20,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:20,448 INFO L276 IsEmpty]: Start isEmpty. Operand 2346 states and 6657 transitions. [2021-06-05 04:36:20,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:20,450 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:20,450 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:20,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4216,548 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:20,650 INFO L430 AbstractCegarLoop]: === Iteration 558 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:20,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:20,650 INFO L82 PathProgramCache]: Analyzing trace with hash 268044504, now seen corresponding path program 544 times [2021-06-05 04:36:20,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:20,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217769610] [2021-06-05 04:36:20,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:20,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:20,762 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:20,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:20,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217769610] [2021-06-05 04:36:20,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217769610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:20,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656444479] [2021-06-05 04:36:20,762 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:20,791 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:36:20,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:20,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:36:20,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:21,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:21,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:21,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:36:21,010 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:21,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:21,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:36:21,013 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:21,037 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:36:21,037 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:36:21,037 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:36:21,038 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:36:21,063 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:21,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656444479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:21,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:21,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 04:36:21,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660503378] [2021-06-05 04:36:21,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:36:21,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:21,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:36:21,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:36:21,064 INFO L87 Difference]: Start difference. First operand 2346 states and 6657 transitions. Second operand has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:21,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:21,434 INFO L93 Difference]: Finished difference Result 2415 states and 6777 transitions. [2021-06-05 04:36:21,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:36:21,434 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:36:21,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:21,437 INFO L225 Difference]: With dead ends: 2415 [2021-06-05 04:36:21,437 INFO L226 Difference]: Without dead ends: 2415 [2021-06-05 04:36:21,437 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 290.9ms TimeCoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:36:21,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2415 states. [2021-06-05 04:36:21,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2415 to 2346. [2021-06-05 04:36:21,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2346 states, 2345 states have (on average 2.8388059701492536) internal successors, (6657), 2345 states have internal predecessors, (6657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:21,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2346 states to 2346 states and 6657 transitions. [2021-06-05 04:36:21,460 INFO L78 Accepts]: Start accepts. Automaton has 2346 states and 6657 transitions. Word has length 19 [2021-06-05 04:36:21,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:21,460 INFO L482 AbstractCegarLoop]: Abstraction has 2346 states and 6657 transitions. [2021-06-05 04:36:21,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:21,460 INFO L276 IsEmpty]: Start isEmpty. Operand 2346 states and 6657 transitions. [2021-06-05 04:36:21,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:21,462 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:21,462 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:21,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4219,549 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:21,663 INFO L430 AbstractCegarLoop]: === Iteration 559 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:21,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:21,663 INFO L82 PathProgramCache]: Analyzing trace with hash -843621406, now seen corresponding path program 545 times [2021-06-05 04:36:21,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:21,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888998720] [2021-06-05 04:36:21,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:21,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:21,773 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:21,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:21,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888998720] [2021-06-05 04:36:21,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888998720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:21,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104175560] [2021-06-05 04:36:21,774 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:21,804 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:36:21,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:21,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:36:21,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:21,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:21,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:36:21,934 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:21,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:36:21,936 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:21,952 INFO L628 ElimStorePlain]: treesize reduction 27, result has 30.8 percent of original size [2021-06-05 04:36:21,952 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:36:21,952 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:36:21,952 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:12 [2021-06-05 04:36:21,975 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:21,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104175560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:21,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:21,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 04:36:21,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519012241] [2021-06-05 04:36:21,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:36:21,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:21,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:36:21,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:36:21,976 INFO L87 Difference]: Start difference. First operand 2346 states and 6657 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:22,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:22,200 INFO L93 Difference]: Finished difference Result 3276 states and 9050 transitions. [2021-06-05 04:36:22,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:36:22,201 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:36:22,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:22,204 INFO L225 Difference]: With dead ends: 3276 [2021-06-05 04:36:22,204 INFO L226 Difference]: Without dead ends: 3276 [2021-06-05 04:36:22,204 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 244.4ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:36:22,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3276 states. [2021-06-05 04:36:22,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3276 to 2345. [2021-06-05 04:36:22,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2345 states, 2344 states have (on average 2.839590443686007) internal successors, (6656), 2344 states have internal predecessors, (6656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:22,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2345 states to 2345 states and 6656 transitions. [2021-06-05 04:36:22,231 INFO L78 Accepts]: Start accepts. Automaton has 2345 states and 6656 transitions. Word has length 19 [2021-06-05 04:36:22,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:22,232 INFO L482 AbstractCegarLoop]: Abstraction has 2345 states and 6656 transitions. [2021-06-05 04:36:22,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:22,232 INFO L276 IsEmpty]: Start isEmpty. Operand 2345 states and 6656 transitions. [2021-06-05 04:36:22,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:22,234 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:22,234 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:22,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 550 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4222 [2021-06-05 04:36:22,434 INFO L430 AbstractCegarLoop]: === Iteration 560 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:22,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:22,435 INFO L82 PathProgramCache]: Analyzing trace with hash -712743494, now seen corresponding path program 546 times [2021-06-05 04:36:22,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:22,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239690447] [2021-06-05 04:36:22,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:22,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:22,545 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:22,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:22,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239690447] [2021-06-05 04:36:22,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239690447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:22,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503086956] [2021-06-05 04:36:22,545 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:22,575 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:36:22,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:22,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:36:22,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:22,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:36:22,714 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:22,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:22,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:36:22,718 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:22,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:22,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:36:22,721 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:22,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:36:22,724 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:22,726 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:36:22,727 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:22,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:36:22,729 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:22,753 INFO L628 ElimStorePlain]: treesize reduction 26, result has 43.5 percent of original size [2021-06-05 04:36:22,753 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:36:22,754 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:36:22,754 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:107, output treesize:20 [2021-06-05 04:36:22,784 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:22,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503086956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:22,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:22,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-05 04:36:22,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967332952] [2021-06-05 04:36:22,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:36:22,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:22,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:36:22,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:36:22,785 INFO L87 Difference]: Start difference. First operand 2345 states and 6656 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:23,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:23,312 INFO L93 Difference]: Finished difference Result 3271 states and 9034 transitions. [2021-06-05 04:36:23,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:36:23,312 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:36:23,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:23,315 INFO L225 Difference]: With dead ends: 3271 [2021-06-05 04:36:23,315 INFO L226 Difference]: Without dead ends: 3265 [2021-06-05 04:36:23,315 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 494.8ms TimeCoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:36:23,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3265 states. [2021-06-05 04:36:23,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3265 to 2345. [2021-06-05 04:36:23,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2345 states, 2344 states have (on average 2.839163822525597) internal successors, (6655), 2344 states have internal predecessors, (6655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:23,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2345 states to 2345 states and 6655 transitions. [2021-06-05 04:36:23,343 INFO L78 Accepts]: Start accepts. Automaton has 2345 states and 6655 transitions. Word has length 19 [2021-06-05 04:36:23,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:23,343 INFO L482 AbstractCegarLoop]: Abstraction has 2345 states and 6655 transitions. [2021-06-05 04:36:23,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:23,343 INFO L276 IsEmpty]: Start isEmpty. Operand 2345 states and 6655 transitions. [2021-06-05 04:36:23,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:23,345 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:23,345 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:23,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4224,551 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:23,546 INFO L430 AbstractCegarLoop]: === Iteration 561 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:23,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:23,546 INFO L82 PathProgramCache]: Analyzing trace with hash -545568448, now seen corresponding path program 547 times [2021-06-05 04:36:23,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:23,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109627870] [2021-06-05 04:36:23,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:23,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:23,661 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:23,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:23,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109627870] [2021-06-05 04:36:23,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109627870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:23,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230284718] [2021-06-05 04:36:23,661 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:23,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:23,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:36:23,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:23,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:23,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:23,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:36:23,868 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:23,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:23,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:36:23,871 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:23,895 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:36:23,895 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:36:23,895 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:36:23,896 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:36:23,919 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:23,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230284718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:23,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:23,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 04:36:23,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57191218] [2021-06-05 04:36:23,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:36:23,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:23,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:36:23,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:36:23,920 INFO L87 Difference]: Start difference. First operand 2345 states and 6655 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:24,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:24,227 INFO L93 Difference]: Finished difference Result 3277 states and 9052 transitions. [2021-06-05 04:36:24,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:36:24,228 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:36:24,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:24,231 INFO L225 Difference]: With dead ends: 3277 [2021-06-05 04:36:24,231 INFO L226 Difference]: Without dead ends: 3277 [2021-06-05 04:36:24,231 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 247.3ms TimeCoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:36:24,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3277 states. [2021-06-05 04:36:24,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3277 to 2346. [2021-06-05 04:36:24,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2346 states, 2345 states have (on average 2.839232409381663) internal successors, (6658), 2345 states have internal predecessors, (6658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:24,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2346 states to 2346 states and 6658 transitions. [2021-06-05 04:36:24,258 INFO L78 Accepts]: Start accepts. Automaton has 2346 states and 6658 transitions. Word has length 19 [2021-06-05 04:36:24,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:24,258 INFO L482 AbstractCegarLoop]: Abstraction has 2346 states and 6658 transitions. [2021-06-05 04:36:24,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:24,258 INFO L276 IsEmpty]: Start isEmpty. Operand 2346 states and 6658 transitions. [2021-06-05 04:36:24,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:24,260 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:24,260 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:24,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 552 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4231 [2021-06-05 04:36:24,460 INFO L430 AbstractCegarLoop]: === Iteration 562 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:24,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:24,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1752979292, now seen corresponding path program 548 times [2021-06-05 04:36:24,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:24,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792031918] [2021-06-05 04:36:24,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:24,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:24,574 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:24,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:24,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792031918] [2021-06-05 04:36:24,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792031918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:24,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758615454] [2021-06-05 04:36:24,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:24,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:36:24,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:24,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:36:24,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:24,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:36:24,818 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:24,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:24,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:24,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:36:24,822 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:24,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:24,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:24,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:36:24,826 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:24,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:36:24,829 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:24,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:36:24,832 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:24,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:36:24,835 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:24,867 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-05 04:36:24,867 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:36:24,868 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:36:24,868 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-05 04:36:24,899 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:24,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758615454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:24,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:24,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 04:36:24,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779694773] [2021-06-05 04:36:24,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:36:24,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:24,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:36:24,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:36:24,900 INFO L87 Difference]: Start difference. First operand 2346 states and 6658 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:25,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:25,545 INFO L93 Difference]: Finished difference Result 3273 states and 9038 transitions. [2021-06-05 04:36:25,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:36:25,545 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:36:25,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:25,548 INFO L225 Difference]: With dead ends: 3273 [2021-06-05 04:36:25,549 INFO L226 Difference]: Without dead ends: 3268 [2021-06-05 04:36:25,549 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 614.5ms TimeCoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:36:25,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3268 states. [2021-06-05 04:36:25,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3268 to 2346. [2021-06-05 04:36:25,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2346 states, 2345 states have (on average 2.8388059701492536) internal successors, (6657), 2345 states have internal predecessors, (6657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:25,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2346 states to 2346 states and 6657 transitions. [2021-06-05 04:36:25,575 INFO L78 Accepts]: Start accepts. Automaton has 2346 states and 6657 transitions. Word has length 19 [2021-06-05 04:36:25,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:25,575 INFO L482 AbstractCegarLoop]: Abstraction has 2346 states and 6657 transitions. [2021-06-05 04:36:25,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:25,576 INFO L276 IsEmpty]: Start isEmpty. Operand 2346 states and 6657 transitions. [2021-06-05 04:36:25,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:25,578 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:25,578 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:25,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4234,553 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:25,778 INFO L430 AbstractCegarLoop]: === Iteration 563 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:25,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:25,779 INFO L82 PathProgramCache]: Analyzing trace with hash 2117451682, now seen corresponding path program 549 times [2021-06-05 04:36:25,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:25,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965587442] [2021-06-05 04:36:25,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:25,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:25,889 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:25,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:25,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965587442] [2021-06-05 04:36:25,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965587442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:25,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482986797] [2021-06-05 04:36:25,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:25,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:36:25,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:25,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:36:25,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:26,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:26,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:26,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:36:26,099 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:26,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:26,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:36:26,102 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:26,125 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:36:26,125 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:36:26,126 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:36:26,126 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:36:26,149 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:26,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482986797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:26,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:26,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 04:36:26,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847688550] [2021-06-05 04:36:26,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:36:26,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:26,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:36:26,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:36:26,150 INFO L87 Difference]: Start difference. First operand 2346 states and 6657 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:27,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:27,044 INFO L93 Difference]: Finished difference Result 3314 states and 9126 transitions. [2021-06-05 04:36:27,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 04:36:27,044 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:36:27,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:27,047 INFO L225 Difference]: With dead ends: 3314 [2021-06-05 04:36:27,047 INFO L226 Difference]: Without dead ends: 3314 [2021-06-05 04:36:27,047 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 747.5ms TimeCoverageRelationStatistics Valid=188, Invalid=1218, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 04:36:27,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3314 states. [2021-06-05 04:36:27,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3314 to 2349. [2021-06-05 04:36:27,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2349 states, 2348 states have (on average 2.8390119250425894) internal successors, (6666), 2348 states have internal predecessors, (6666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:27,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2349 states to 2349 states and 6666 transitions. [2021-06-05 04:36:27,072 INFO L78 Accepts]: Start accepts. Automaton has 2349 states and 6666 transitions. Word has length 19 [2021-06-05 04:36:27,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:27,072 INFO L482 AbstractCegarLoop]: Abstraction has 2349 states and 6666 transitions. [2021-06-05 04:36:27,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:27,072 INFO L276 IsEmpty]: Start isEmpty. Operand 2349 states and 6666 transitions. [2021-06-05 04:36:27,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:27,074 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:27,074 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:27,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 554 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4241 [2021-06-05 04:36:27,274 INFO L430 AbstractCegarLoop]: === Iteration 564 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:27,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:27,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1246633026, now seen corresponding path program 550 times [2021-06-05 04:36:27,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:27,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620349707] [2021-06-05 04:36:27,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:27,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:27,392 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:27,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:27,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620349707] [2021-06-05 04:36:27,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620349707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:27,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724482312] [2021-06-05 04:36:27,392 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:27,421 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:36:27,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:27,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:36:27,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:27,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:36:27,636 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:27,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:27,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:27,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:36:27,640 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:27,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:27,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:27,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:36:27,644 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:27,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:36:27,647 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:27,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:36:27,650 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:27,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:36:27,653 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:27,685 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-05 04:36:27,685 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:36:27,686 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:36:27,686 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-05 04:36:27,717 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:27,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724482312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:27,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:27,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 04:36:27,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306995556] [2021-06-05 04:36:27,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:36:27,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:27,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:36:27,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:36:27,718 INFO L87 Difference]: Start difference. First operand 2349 states and 6666 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:28,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:28,369 INFO L93 Difference]: Finished difference Result 3283 states and 9057 transitions. [2021-06-05 04:36:28,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:36:28,370 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:36:28,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:28,373 INFO L225 Difference]: With dead ends: 3283 [2021-06-05 04:36:28,373 INFO L226 Difference]: Without dead ends: 3279 [2021-06-05 04:36:28,373 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 597.3ms TimeCoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:36:28,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3279 states. [2021-06-05 04:36:28,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3279 to 2351. [2021-06-05 04:36:28,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2351 states, 2350 states have (on average 2.8387234042553193) internal successors, (6671), 2350 states have internal predecessors, (6671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:28,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2351 states to 2351 states and 6671 transitions. [2021-06-05 04:36:28,398 INFO L78 Accepts]: Start accepts. Automaton has 2351 states and 6671 transitions. Word has length 19 [2021-06-05 04:36:28,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:28,398 INFO L482 AbstractCegarLoop]: Abstraction has 2351 states and 6671 transitions. [2021-06-05 04:36:28,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:28,398 INFO L276 IsEmpty]: Start isEmpty. Operand 2351 states and 6671 transitions. [2021-06-05 04:36:28,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:28,400 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:28,400 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:28,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 555 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4244 [2021-06-05 04:36:28,601 INFO L430 AbstractCegarLoop]: === Iteration 565 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:28,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:28,601 INFO L82 PathProgramCache]: Analyzing trace with hash 956429568, now seen corresponding path program 551 times [2021-06-05 04:36:28,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:28,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107312311] [2021-06-05 04:36:28,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:28,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:28,710 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:28,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:28,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107312311] [2021-06-05 04:36:28,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107312311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:28,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879148003] [2021-06-05 04:36:28,710 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:28,741 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:36:28,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:28,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:36:28,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:28,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:28,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:28,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:36:28,936 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:28,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:28,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:36:28,940 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:28,963 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:36:28,963 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:36:28,964 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:36:28,964 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:36:28,987 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:28,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879148003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:28,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:28,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 04:36:28,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787627410] [2021-06-05 04:36:28,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:36:28,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:28,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:36:28,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:36:28,988 INFO L87 Difference]: Start difference. First operand 2351 states and 6671 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:30,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:30,551 INFO L93 Difference]: Finished difference Result 3492 states and 9443 transitions. [2021-06-05 04:36:30,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 04:36:30,551 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:36:30,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:30,555 INFO L225 Difference]: With dead ends: 3492 [2021-06-05 04:36:30,555 INFO L226 Difference]: Without dead ends: 3492 [2021-06-05 04:36:30,556 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1065 ImplicationChecksByTransitivity, 1264.6ms TimeCoverageRelationStatistics Valid=400, Invalid=3382, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 04:36:30,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3492 states. [2021-06-05 04:36:30,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3492 to 2372. [2021-06-05 04:36:30,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2372 states, 2371 states have (on average 2.844369464361029) internal successors, (6744), 2371 states have internal predecessors, (6744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:30,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2372 states to 2372 states and 6744 transitions. [2021-06-05 04:36:30,586 INFO L78 Accepts]: Start accepts. Automaton has 2372 states and 6744 transitions. Word has length 19 [2021-06-05 04:36:30,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:30,586 INFO L482 AbstractCegarLoop]: Abstraction has 2372 states and 6744 transitions. [2021-06-05 04:36:30,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:30,586 INFO L276 IsEmpty]: Start isEmpty. Operand 2372 states and 6744 transitions. [2021-06-05 04:36:30,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:30,589 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:30,589 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:30,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 556 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4251 [2021-06-05 04:36:30,789 INFO L430 AbstractCegarLoop]: === Iteration 566 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:30,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:30,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1784488604, now seen corresponding path program 552 times [2021-06-05 04:36:30,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:30,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005600735] [2021-06-05 04:36:30,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:30,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:30,921 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:30,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:30,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005600735] [2021-06-05 04:36:30,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005600735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:30,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716044757] [2021-06-05 04:36:30,921 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:30,950 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:36:30,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:30,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:36:30,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:31,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:36:31,151 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:31,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:31,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:31,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:36:31,155 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:31,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:31,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:31,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:36:31,159 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:31,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:36:31,162 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:31,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:36:31,165 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:31,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:36:31,168 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:31,199 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-05 04:36:31,199 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:36:31,200 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:36:31,200 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-05 04:36:31,231 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:31,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716044757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:31,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:31,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 04:36:31,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878793564] [2021-06-05 04:36:31,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:36:31,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:31,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:36:31,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:36:31,232 INFO L87 Difference]: Start difference. First operand 2372 states and 6744 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:31,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:31,859 INFO L93 Difference]: Finished difference Result 3307 states and 9136 transitions. [2021-06-05 04:36:31,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:36:31,859 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:36:31,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:31,862 INFO L225 Difference]: With dead ends: 3307 [2021-06-05 04:36:31,862 INFO L226 Difference]: Without dead ends: 3304 [2021-06-05 04:36:31,863 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 577.8ms TimeCoverageRelationStatistics Valid=122, Invalid=870, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:36:31,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3304 states. [2021-06-05 04:36:31,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3304 to 2374. [2021-06-05 04:36:31,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2374 states, 2373 states have (on average 2.8440792246101982) internal successors, (6749), 2373 states have internal predecessors, (6749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:31,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2374 states to 2374 states and 6749 transitions. [2021-06-05 04:36:31,888 INFO L78 Accepts]: Start accepts. Automaton has 2374 states and 6749 transitions. Word has length 19 [2021-06-05 04:36:31,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:31,888 INFO L482 AbstractCegarLoop]: Abstraction has 2374 states and 6749 transitions. [2021-06-05 04:36:31,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:31,888 INFO L276 IsEmpty]: Start isEmpty. Operand 2374 states and 6749 transitions. [2021-06-05 04:36:31,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:31,890 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:31,890 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:32,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4254,557 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:32,090 INFO L430 AbstractCegarLoop]: === Iteration 567 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:32,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:32,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1196071906, now seen corresponding path program 553 times [2021-06-05 04:36:32,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:32,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621990609] [2021-06-05 04:36:32,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:32,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:32,227 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:32,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:32,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621990609] [2021-06-05 04:36:32,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621990609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:32,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903963649] [2021-06-05 04:36:32,227 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:32,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:32,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:36:32,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:32,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:32,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:32,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:36:32,505 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:32,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:32,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:36:32,509 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:32,536 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:36:32,536 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:36:32,537 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:36:32,537 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:36:32,564 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:32,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903963649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:32,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:32,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 04:36:32,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539099541] [2021-06-05 04:36:32,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:36:32,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:32,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:36:32,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:36:32,565 INFO L87 Difference]: Start difference. First operand 2374 states and 6749 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:33,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:33,732 INFO L93 Difference]: Finished difference Result 3443 states and 9382 transitions. [2021-06-05 04:36:33,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 04:36:33,732 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:36:33,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:33,736 INFO L225 Difference]: With dead ends: 3443 [2021-06-05 04:36:33,736 INFO L226 Difference]: Without dead ends: 3443 [2021-06-05 04:36:33,737 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 902.9ms TimeCoverageRelationStatistics Valid=192, Invalid=1530, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 04:36:33,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3443 states. [2021-06-05 04:36:33,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3443 to 2389. [2021-06-05 04:36:33,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2389 states, 2388 states have (on average 2.8479899497487438) internal successors, (6801), 2388 states have internal predecessors, (6801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:33,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2389 states to 2389 states and 6801 transitions. [2021-06-05 04:36:33,774 INFO L78 Accepts]: Start accepts. Automaton has 2389 states and 6801 transitions. Word has length 19 [2021-06-05 04:36:33,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:33,775 INFO L482 AbstractCegarLoop]: Abstraction has 2389 states and 6801 transitions. [2021-06-05 04:36:33,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:33,775 INFO L276 IsEmpty]: Start isEmpty. Operand 2389 states and 6801 transitions. [2021-06-05 04:36:33,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:33,778 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:33,778 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:33,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 558 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4261 [2021-06-05 04:36:33,999 INFO L430 AbstractCegarLoop]: === Iteration 568 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:33,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:33,999 INFO L82 PathProgramCache]: Analyzing trace with hash 276371198, now seen corresponding path program 554 times [2021-06-05 04:36:33,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:33,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992218118] [2021-06-05 04:36:33,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:34,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:34,166 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:34,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:34,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992218118] [2021-06-05 04:36:34,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992218118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:34,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826620903] [2021-06-05 04:36:34,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:34,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:36:34,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:34,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:36:34,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:34,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:36:34,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:34,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:34,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:34,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:36:34,464 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:34,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:34,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:34,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:36:34,469 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:34,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:36:34,472 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:34,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:36:34,476 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:34,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:36:34,479 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:34,516 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-05 04:36:34,517 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:36:34,518 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:36:34,518 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-05 04:36:34,554 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:34,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826620903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:34,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:34,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 04:36:34,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952891584] [2021-06-05 04:36:34,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:36:34,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:34,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:36:34,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:36:34,555 INFO L87 Difference]: Start difference. First operand 2389 states and 6801 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:35,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:35,313 INFO L93 Difference]: Finished difference Result 3324 states and 9193 transitions. [2021-06-05 04:36:35,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:36:35,313 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:36:35,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:35,317 INFO L225 Difference]: With dead ends: 3324 [2021-06-05 04:36:35,317 INFO L226 Difference]: Without dead ends: 3322 [2021-06-05 04:36:35,317 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 714.5ms TimeCoverageRelationStatistics Valid=120, Invalid=810, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:36:35,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3322 states. [2021-06-05 04:36:35,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3322 to 2391. [2021-06-05 04:36:35,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2391 states, 2390 states have (on average 2.8476987447698745) internal successors, (6806), 2390 states have internal predecessors, (6806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:35,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2391 states to 2391 states and 6806 transitions. [2021-06-05 04:36:35,356 INFO L78 Accepts]: Start accepts. Automaton has 2391 states and 6806 transitions. Word has length 19 [2021-06-05 04:36:35,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:35,356 INFO L482 AbstractCegarLoop]: Abstraction has 2391 states and 6806 transitions. [2021-06-05 04:36:35,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:35,356 INFO L276 IsEmpty]: Start isEmpty. Operand 2391 states and 6806 transitions. [2021-06-05 04:36:35,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:35,359 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:35,359 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:35,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 559 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4264 [2021-06-05 04:36:35,581 INFO L430 AbstractCegarLoop]: === Iteration 569 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:35,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:35,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1203802304, now seen corresponding path program 555 times [2021-06-05 04:36:35,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:35,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54288945] [2021-06-05 04:36:35,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:35,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:35,727 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:35,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:35,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54288945] [2021-06-05 04:36:35,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54288945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:35,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026116910] [2021-06-05 04:36:35,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:35,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:36:35,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:35,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:36:35,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:35,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:35,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:35,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:36:35,964 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:35,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:35,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:35,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:36:35,968 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:35,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:35,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:35,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:36:35,972 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:35,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:35,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:36:35,976 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:36,016 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:36:36,017 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:36:36,017 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:36:36,017 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:36:36,084 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:36,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026116910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:36,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:36,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 04:36:36,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68874237] [2021-06-05 04:36:36,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:36:36,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:36,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:36:36,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:36:36,085 INFO L87 Difference]: Start difference. First operand 2391 states and 6806 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:37,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:37,137 INFO L93 Difference]: Finished difference Result 3441 states and 9378 transitions. [2021-06-05 04:36:37,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 04:36:37,137 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:36:37,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:37,141 INFO L225 Difference]: With dead ends: 3441 [2021-06-05 04:36:37,141 INFO L226 Difference]: Without dead ends: 3441 [2021-06-05 04:36:37,142 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 892.6ms TimeCoverageRelationStatistics Valid=151, Invalid=1109, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 04:36:37,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3441 states. [2021-06-05 04:36:37,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3441 to 2400. [2021-06-05 04:36:37,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2400 states, 2399 states have (on average 2.850354314297624) internal successors, (6838), 2399 states have internal predecessors, (6838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:37,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2400 states to 2400 states and 6838 transitions. [2021-06-05 04:36:37,179 INFO L78 Accepts]: Start accepts. Automaton has 2400 states and 6838 transitions. Word has length 19 [2021-06-05 04:36:37,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:37,179 INFO L482 AbstractCegarLoop]: Abstraction has 2400 states and 6838 transitions. [2021-06-05 04:36:37,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:37,179 INFO L276 IsEmpty]: Start isEmpty. Operand 2400 states and 6838 transitions. [2021-06-05 04:36:37,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:37,182 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:37,182 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:37,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4271,560 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:37,403 INFO L430 AbstractCegarLoop]: === Iteration 570 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:37,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:37,403 INFO L82 PathProgramCache]: Analyzing trace with hash 2005418532, now seen corresponding path program 556 times [2021-06-05 04:36:37,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:37,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030134084] [2021-06-05 04:36:37,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:37,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:37,566 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:37,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:37,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030134084] [2021-06-05 04:36:37,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030134084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:37,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334785180] [2021-06-05 04:36:37,567 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:37,604 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:36:37,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:37,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:36:37,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:37,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:37,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:37,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:36:37,825 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:37,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:37,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:37,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:36:37,829 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:37,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:37,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:37,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:36:37,834 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:37,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:37,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:36:37,837 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:37,878 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:36:37,878 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:36:37,879 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:36:37,879 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:36:37,964 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:37,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334785180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:37,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:37,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 04:36:37,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003666485] [2021-06-05 04:36:37,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:36:37,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:37,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:36:37,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:36:37,965 INFO L87 Difference]: Start difference. First operand 2400 states and 6838 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:39,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:39,022 INFO L93 Difference]: Finished difference Result 3362 states and 9269 transitions. [2021-06-05 04:36:39,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 04:36:39,022 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:36:39,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:39,026 INFO L225 Difference]: With dead ends: 3362 [2021-06-05 04:36:39,026 INFO L226 Difference]: Without dead ends: 3359 [2021-06-05 04:36:39,027 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 992.4ms TimeCoverageRelationStatistics Valid=169, Invalid=1021, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:36:39,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3359 states. [2021-06-05 04:36:39,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3359 to 2402. [2021-06-05 04:36:39,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2402 states, 2401 states have (on average 2.8504789670970427) internal successors, (6844), 2401 states have internal predecessors, (6844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:39,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2402 states to 2402 states and 6844 transitions. [2021-06-05 04:36:39,062 INFO L78 Accepts]: Start accepts. Automaton has 2402 states and 6844 transitions. Word has length 19 [2021-06-05 04:36:39,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:39,062 INFO L482 AbstractCegarLoop]: Abstraction has 2402 states and 6844 transitions. [2021-06-05 04:36:39,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:39,062 INFO L276 IsEmpty]: Start isEmpty. Operand 2402 states and 6844 transitions. [2021-06-05 04:36:39,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:39,064 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:39,065 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:39,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 561 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4275 [2021-06-05 04:36:39,283 INFO L430 AbstractCegarLoop]: === Iteration 571 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:39,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:39,283 INFO L82 PathProgramCache]: Analyzing trace with hash -571205058, now seen corresponding path program 557 times [2021-06-05 04:36:39,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:39,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434719663] [2021-06-05 04:36:39,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:39,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:39,445 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:39,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:39,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434719663] [2021-06-05 04:36:39,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434719663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:39,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792235051] [2021-06-05 04:36:39,445 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 562 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 562 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:39,484 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:36:39,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:39,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:36:39,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:39,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:39,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:39,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:36:39,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:39,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:39,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:39,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:36:39,687 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:39,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:39,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:39,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:36:39,691 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:39,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:39,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:36:39,695 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:39,735 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:36:39,735 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:36:39,736 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:36:39,736 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:36:39,806 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:39,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792235051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:39,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:39,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 04:36:39,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778426966] [2021-06-05 04:36:39,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:36:39,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:39,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:36:39,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:36:39,807 INFO L87 Difference]: Start difference. First operand 2402 states and 6844 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:40,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:40,489 INFO L93 Difference]: Finished difference Result 3351 states and 9253 transitions. [2021-06-05 04:36:40,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:36:40,490 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:36:40,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:40,493 INFO L225 Difference]: With dead ends: 3351 [2021-06-05 04:36:40,493 INFO L226 Difference]: Without dead ends: 3351 [2021-06-05 04:36:40,494 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 686.7ms TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:36:40,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3351 states. [2021-06-05 04:36:40,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3351 to 2400. [2021-06-05 04:36:40,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2400 states, 2399 states have (on average 2.8495206335973324) internal successors, (6836), 2399 states have internal predecessors, (6836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:40,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2400 states to 2400 states and 6836 transitions. [2021-06-05 04:36:40,528 INFO L78 Accepts]: Start accepts. Automaton has 2400 states and 6836 transitions. Word has length 19 [2021-06-05 04:36:40,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:40,528 INFO L482 AbstractCegarLoop]: Abstraction has 2400 states and 6836 transitions. [2021-06-05 04:36:40,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:40,529 INFO L276 IsEmpty]: Start isEmpty. Operand 2400 states and 6836 transitions. [2021-06-05 04:36:40,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:40,531 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:40,531 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:40,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 562 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4281 [2021-06-05 04:36:40,753 INFO L430 AbstractCegarLoop]: === Iteration 572 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:40,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:40,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1144374456, now seen corresponding path program 558 times [2021-06-05 04:36:40,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:40,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266260134] [2021-06-05 04:36:40,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:40,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:40,889 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:40,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:40,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266260134] [2021-06-05 04:36:40,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266260134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:40,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191907045] [2021-06-05 04:36:40,889 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 563 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 563 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:40,927 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:36:40,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:40,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:36:40,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:41,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:41,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:41,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:36:41,117 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:41,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:41,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:36:41,120 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:41,143 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:36:41,143 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:36:41,144 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:36:41,144 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:36:41,167 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:41,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191907045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:41,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:41,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 04:36:41,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242885155] [2021-06-05 04:36:41,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:36:41,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:41,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:36:41,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:36:41,168 INFO L87 Difference]: Start difference. First operand 2400 states and 6836 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:41,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:41,450 INFO L93 Difference]: Finished difference Result 2744 states and 7675 transitions. [2021-06-05 04:36:41,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:36:41,450 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:36:41,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:41,453 INFO L225 Difference]: With dead ends: 2744 [2021-06-05 04:36:41,453 INFO L226 Difference]: Without dead ends: 2744 [2021-06-05 04:36:41,453 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 271.5ms TimeCoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:36:41,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2744 states. [2021-06-05 04:36:41,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2744 to 2406. [2021-06-05 04:36:41,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2406 states, 2405 states have (on average 2.849064449064449) internal successors, (6852), 2405 states have internal predecessors, (6852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:41,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2406 states to 2406 states and 6852 transitions. [2021-06-05 04:36:41,475 INFO L78 Accepts]: Start accepts. Automaton has 2406 states and 6852 transitions. Word has length 19 [2021-06-05 04:36:41,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:41,475 INFO L482 AbstractCegarLoop]: Abstraction has 2406 states and 6852 transitions. [2021-06-05 04:36:41,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:41,475 INFO L276 IsEmpty]: Start isEmpty. Operand 2406 states and 6852 transitions. [2021-06-05 04:36:41,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:41,478 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:41,478 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:41,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 563 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4285 [2021-06-05 04:36:41,678 INFO L430 AbstractCegarLoop]: === Iteration 573 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:41,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:41,678 INFO L82 PathProgramCache]: Analyzing trace with hash -63036388, now seen corresponding path program 559 times [2021-06-05 04:36:41,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:41,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781372481] [2021-06-05 04:36:41,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:41,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:41,787 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:41,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:41,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781372481] [2021-06-05 04:36:41,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781372481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:41,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985652855] [2021-06-05 04:36:41,787 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 564 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 564 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:41,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:41,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:36:41,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:42,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:36:42,048 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:42,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:42,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:42,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:36:42,054 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:42,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:42,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:42,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:36:42,059 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:42,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:36:42,063 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:42,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:36:42,067 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:42,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:36:42,071 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:42,106 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-05 04:36:42,106 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:36:42,107 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:36:42,107 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-05 04:36:42,138 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:42,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985652855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:42,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:42,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 04:36:42,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189596540] [2021-06-05 04:36:42,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:36:42,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:42,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:36:42,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:36:42,139 INFO L87 Difference]: Start difference. First operand 2406 states and 6852 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:42,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:42,563 INFO L93 Difference]: Finished difference Result 2733 states and 7643 transitions. [2021-06-05 04:36:42,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:36:42,563 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:36:42,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:42,566 INFO L225 Difference]: With dead ends: 2733 [2021-06-05 04:36:42,566 INFO L226 Difference]: Without dead ends: 2728 [2021-06-05 04:36:42,566 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 426.6ms TimeCoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:36:42,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2728 states. [2021-06-05 04:36:42,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2728 to 2409. [2021-06-05 04:36:42,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2409 states, 2408 states have (on average 2.846345514950166) internal successors, (6854), 2408 states have internal predecessors, (6854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:42,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2409 states to 2409 states and 6854 transitions. [2021-06-05 04:36:42,590 INFO L78 Accepts]: Start accepts. Automaton has 2409 states and 6854 transitions. Word has length 19 [2021-06-05 04:36:42,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:42,590 INFO L482 AbstractCegarLoop]: Abstraction has 2409 states and 6854 transitions. [2021-06-05 04:36:42,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:42,590 INFO L276 IsEmpty]: Start isEmpty. Operand 2409 states and 6854 transitions. [2021-06-05 04:36:42,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:42,593 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:42,593 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:42,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 564 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4288 [2021-06-05 04:36:42,793 INFO L430 AbstractCegarLoop]: === Iteration 574 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:42,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:42,793 INFO L82 PathProgramCache]: Analyzing trace with hash -487572710, now seen corresponding path program 560 times [2021-06-05 04:36:42,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:42,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415875142] [2021-06-05 04:36:42,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:42,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:42,901 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:42,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:42,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415875142] [2021-06-05 04:36:42,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415875142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:42,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104470280] [2021-06-05 04:36:42,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 565 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 565 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:42,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:36:42,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:42,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:36:42,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:43,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:43,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:43,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:36:43,099 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:43,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:43,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:36:43,102 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:43,126 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:36:43,126 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:36:43,127 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:36:43,127 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:36:43,150 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:43,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104470280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:43,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:43,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 04:36:43,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738853132] [2021-06-05 04:36:43,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:36:43,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:43,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:36:43,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:36:43,151 INFO L87 Difference]: Start difference. First operand 2409 states and 6854 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:43,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:43,981 INFO L93 Difference]: Finished difference Result 2767 states and 7721 transitions. [2021-06-05 04:36:43,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 04:36:43,982 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:36:43,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:43,984 INFO L225 Difference]: With dead ends: 2767 [2021-06-05 04:36:43,984 INFO L226 Difference]: Without dead ends: 2767 [2021-06-05 04:36:43,984 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 732.3ms TimeCoverageRelationStatistics Valid=186, Invalid=1220, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 04:36:43,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2767 states. [2021-06-05 04:36:44,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2767 to 2405. [2021-06-05 04:36:44,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2405 states, 2404 states have (on average 2.8494176372712148) internal successors, (6850), 2404 states have internal predecessors, (6850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:44,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2405 states to 2405 states and 6850 transitions. [2021-06-05 04:36:44,006 INFO L78 Accepts]: Start accepts. Automaton has 2405 states and 6850 transitions. Word has length 19 [2021-06-05 04:36:44,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:44,006 INFO L482 AbstractCegarLoop]: Abstraction has 2405 states and 6850 transitions. [2021-06-05 04:36:44,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:44,006 INFO L276 IsEmpty]: Start isEmpty. Operand 2405 states and 6850 transitions. [2021-06-05 04:36:44,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:44,008 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:44,008 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:44,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4295,565 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:44,209 INFO L430 AbstractCegarLoop]: === Iteration 575 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:44,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:44,209 INFO L82 PathProgramCache]: Analyzing trace with hash 443309878, now seen corresponding path program 561 times [2021-06-05 04:36:44,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:44,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918588728] [2021-06-05 04:36:44,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:44,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:44,320 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:44,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:44,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918588728] [2021-06-05 04:36:44,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918588728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:44,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507413692] [2021-06-05 04:36:44,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 566 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 566 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:44,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:36:44,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:44,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:36:44,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:44,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:36:44,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:44,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:44,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:44,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:36:44,552 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:44,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:44,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:44,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:36:44,556 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:44,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:36:44,559 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:44,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:36:44,562 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:44,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:36:44,565 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:44,596 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-05 04:36:44,596 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:36:44,597 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:36:44,597 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-05 04:36:44,628 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:44,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507413692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:44,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:44,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 04:36:44,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260410175] [2021-06-05 04:36:44,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:36:44,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:44,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:36:44,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:36:44,628 INFO L87 Difference]: Start difference. First operand 2405 states and 6850 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:45,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:45,003 INFO L93 Difference]: Finished difference Result 2727 states and 7638 transitions. [2021-06-05 04:36:45,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:36:45,004 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:36:45,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:45,006 INFO L225 Difference]: With dead ends: 2727 [2021-06-05 04:36:45,006 INFO L226 Difference]: Without dead ends: 2723 [2021-06-05 04:36:45,006 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 381.5ms TimeCoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:36:45,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2723 states. [2021-06-05 04:36:45,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2723 to 2406. [2021-06-05 04:36:45,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2406 states, 2405 states have (on average 2.849064449064449) internal successors, (6852), 2405 states have internal predecessors, (6852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:45,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2406 states to 2406 states and 6852 transitions. [2021-06-05 04:36:45,028 INFO L78 Accepts]: Start accepts. Automaton has 2406 states and 6852 transitions. Word has length 19 [2021-06-05 04:36:45,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:45,028 INFO L482 AbstractCegarLoop]: Abstraction has 2406 states and 6852 transitions. [2021-06-05 04:36:45,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:45,028 INFO L276 IsEmpty]: Start isEmpty. Operand 2406 states and 6852 transitions. [2021-06-05 04:36:45,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:45,030 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:45,030 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:45,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 566 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4298 [2021-06-05 04:36:45,231 INFO L430 AbstractCegarLoop]: === Iteration 576 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:45,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:45,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1648594824, now seen corresponding path program 562 times [2021-06-05 04:36:45,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:45,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333407983] [2021-06-05 04:36:45,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:45,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:45,340 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:45,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:45,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333407983] [2021-06-05 04:36:45,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333407983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:45,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717718333] [2021-06-05 04:36:45,341 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 567 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 567 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:45,369 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:36:45,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:45,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:36:45,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:45,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:45,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:45,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:36:45,543 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:45,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:45,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:36:45,546 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:45,569 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:36:45,570 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:36:45,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:36:45,570 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:36:45,594 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:45,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717718333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:45,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:45,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 04:36:45,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400812376] [2021-06-05 04:36:45,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:36:45,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:45,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:36:45,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:36:45,594 INFO L87 Difference]: Start difference. First operand 2406 states and 6852 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:47,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:47,354 INFO L93 Difference]: Finished difference Result 2939 states and 8028 transitions. [2021-06-05 04:36:47,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 04:36:47,354 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:36:47,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:47,358 INFO L225 Difference]: With dead ends: 2939 [2021-06-05 04:36:47,358 INFO L226 Difference]: Without dead ends: 2939 [2021-06-05 04:36:47,358 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1040 ImplicationChecksByTransitivity, 1321.8ms TimeCoverageRelationStatistics Valid=404, Invalid=3378, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 04:36:47,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2939 states. [2021-06-05 04:36:47,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2939 to 2427. [2021-06-05 04:36:47,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2427 states, 2426 states have (on average 2.8544929925803793) internal successors, (6925), 2426 states have internal predecessors, (6925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:47,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2427 states to 2427 states and 6925 transitions. [2021-06-05 04:36:47,385 INFO L78 Accepts]: Start accepts. Automaton has 2427 states and 6925 transitions. Word has length 19 [2021-06-05 04:36:47,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:47,385 INFO L482 AbstractCegarLoop]: Abstraction has 2427 states and 6925 transitions. [2021-06-05 04:36:47,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:47,386 INFO L276 IsEmpty]: Start isEmpty. Operand 2427 states and 6925 transitions. [2021-06-05 04:36:47,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:47,388 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:47,388 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:47,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4305,567 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:47,588 INFO L430 AbstractCegarLoop]: === Iteration 577 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:47,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:47,588 INFO L82 PathProgramCache]: Analyzing trace with hash -94545700, now seen corresponding path program 563 times [2021-06-05 04:36:47,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:47,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162592188] [2021-06-05 04:36:47,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:47,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:47,720 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:47,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:47,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162592188] [2021-06-05 04:36:47,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162592188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:47,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168387721] [2021-06-05 04:36:47,720 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 568 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 568 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:47,750 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:36:47,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:47,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:36:47,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:47,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:36:47,961 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:47,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:47,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:47,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:36:47,965 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:47,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:47,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:47,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:36:47,969 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:47,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:36:47,972 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:47,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:36:47,976 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:47,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:36:47,979 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:48,011 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-05 04:36:48,011 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:36:48,012 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:36:48,012 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-05 04:36:48,043 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:48,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168387721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:48,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:48,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 04:36:48,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036670319] [2021-06-05 04:36:48,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:36:48,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:48,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:36:48,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:36:48,044 INFO L87 Difference]: Start difference. First operand 2427 states and 6925 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:48,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:48,430 INFO L93 Difference]: Finished difference Result 2764 states and 7736 transitions. [2021-06-05 04:36:48,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:36:48,430 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:36:48,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:48,433 INFO L225 Difference]: With dead ends: 2764 [2021-06-05 04:36:48,433 INFO L226 Difference]: Without dead ends: 2761 [2021-06-05 04:36:48,434 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 449.3ms TimeCoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:36:48,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2761 states. [2021-06-05 04:36:48,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2761 to 2433. [2021-06-05 04:36:48,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2433 states, 2432 states have (on average 2.8536184210526314) internal successors, (6940), 2432 states have internal predecessors, (6940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:48,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2433 states to 2433 states and 6940 transitions. [2021-06-05 04:36:48,458 INFO L78 Accepts]: Start accepts. Automaton has 2433 states and 6940 transitions. Word has length 19 [2021-06-05 04:36:48,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:48,458 INFO L482 AbstractCegarLoop]: Abstraction has 2433 states and 6940 transitions. [2021-06-05 04:36:48,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:48,458 INFO L276 IsEmpty]: Start isEmpty. Operand 2433 states and 6940 transitions. [2021-06-05 04:36:48,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:48,460 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:48,460 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:48,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 568 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4308 [2021-06-05 04:36:48,661 INFO L430 AbstractCegarLoop]: === Iteration 578 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:48,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:48,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1408952486, now seen corresponding path program 564 times [2021-06-05 04:36:48,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:48,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186085886] [2021-06-05 04:36:48,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:48,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:48,771 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:48,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:48,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186085886] [2021-06-05 04:36:48,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186085886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:48,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16782117] [2021-06-05 04:36:48,772 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 569 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 569 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:48,802 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:36:48,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:48,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:36:48,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:48,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:48,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:48,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:36:48,976 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:48,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:48,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:36:48,979 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:49,003 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:36:49,003 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:36:49,003 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:36:49,004 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:36:49,027 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:49,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16782117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:49,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:49,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 04:36:49,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858496299] [2021-06-05 04:36:49,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:36:49,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:49,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:36:49,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:36:49,027 INFO L87 Difference]: Start difference. First operand 2433 states and 6940 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:50,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:50,114 INFO L93 Difference]: Finished difference Result 2909 states and 8003 transitions. [2021-06-05 04:36:50,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 04:36:50,114 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:36:50,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:50,117 INFO L225 Difference]: With dead ends: 2909 [2021-06-05 04:36:50,117 INFO L226 Difference]: Without dead ends: 2909 [2021-06-05 04:36:50,117 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 803.8ms TimeCoverageRelationStatistics Valid=219, Invalid=1761, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 04:36:50,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2909 states. [2021-06-05 04:36:50,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2909 to 2448. [2021-06-05 04:36:50,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2448 states, 2447 states have (on average 2.8573763792398856) internal successors, (6992), 2447 states have internal predecessors, (6992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:50,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2448 states to 2448 states and 6992 transitions. [2021-06-05 04:36:50,140 INFO L78 Accepts]: Start accepts. Automaton has 2448 states and 6992 transitions. Word has length 19 [2021-06-05 04:36:50,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:50,140 INFO L482 AbstractCegarLoop]: Abstraction has 2448 states and 6992 transitions. [2021-06-05 04:36:50,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:50,140 INFO L276 IsEmpty]: Start isEmpty. Operand 2448 states and 6992 transitions. [2021-06-05 04:36:50,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:50,142 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:50,142 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:50,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 569 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4315 [2021-06-05 04:36:50,343 INFO L430 AbstractCegarLoop]: === Iteration 579 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:50,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:50,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1966314102, now seen corresponding path program 565 times [2021-06-05 04:36:50,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:50,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013451335] [2021-06-05 04:36:50,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:50,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:50,462 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:50,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:50,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013451335] [2021-06-05 04:36:50,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013451335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:50,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419258483] [2021-06-05 04:36:50,462 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 570 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 570 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:50,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:50,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:36:50,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:50,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:36:50,684 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:50,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:50,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:50,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:36:50,688 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:50,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:50,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:50,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:36:50,692 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:50,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:36:50,695 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:50,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:36:50,698 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:50,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:36:50,701 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:50,733 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-05 04:36:50,733 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:36:50,734 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:36:50,734 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-05 04:36:50,765 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:50,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419258483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:50,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:50,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 04:36:50,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485505497] [2021-06-05 04:36:50,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:36:50,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:50,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:36:50,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:36:50,766 INFO L87 Difference]: Start difference. First operand 2448 states and 6992 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:51,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:51,219 INFO L93 Difference]: Finished difference Result 2791 states and 7810 transitions. [2021-06-05 04:36:51,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:36:51,219 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:36:51,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:51,222 INFO L225 Difference]: With dead ends: 2791 [2021-06-05 04:36:51,222 INFO L226 Difference]: Without dead ends: 2789 [2021-06-05 04:36:51,222 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 455.0ms TimeCoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:36:51,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2789 states. [2021-06-05 04:36:51,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2789 to 2451. [2021-06-05 04:36:51,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2451 states, 2450 states have (on average 2.857551020408163) internal successors, (7001), 2450 states have internal predecessors, (7001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:51,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2451 states to 2451 states and 7001 transitions. [2021-06-05 04:36:51,248 INFO L78 Accepts]: Start accepts. Automaton has 2451 states and 7001 transitions. Word has length 19 [2021-06-05 04:36:51,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:51,248 INFO L482 AbstractCegarLoop]: Abstraction has 2451 states and 7001 transitions. [2021-06-05 04:36:51,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:51,248 INFO L276 IsEmpty]: Start isEmpty. Operand 2451 states and 7001 transitions. [2021-06-05 04:36:51,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:51,250 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:51,250 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:51,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4318,570 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:51,451 INFO L430 AbstractCegarLoop]: === Iteration 580 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:51,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:51,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1401222088, now seen corresponding path program 566 times [2021-06-05 04:36:51,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:51,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16464587] [2021-06-05 04:36:51,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:51,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:51,595 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:51,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:51,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16464587] [2021-06-05 04:36:51,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16464587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:51,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50502439] [2021-06-05 04:36:51,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 571 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 571 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:51,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:36:51,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:51,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:36:51,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:51,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:51,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:51,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:36:51,859 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:51,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:51,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:51,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:36:51,863 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:51,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:51,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:51,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:36:51,868 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:51,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:51,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:36:51,873 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:51,914 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:36:51,914 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:36:51,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:36:51,915 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:36:51,972 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:51,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50502439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:51,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:51,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 04:36:51,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126981595] [2021-06-05 04:36:51,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:36:51,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:51,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:36:51,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:36:51,973 INFO L87 Difference]: Start difference. First operand 2451 states and 7001 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:52,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:52,857 INFO L93 Difference]: Finished difference Result 2910 states and 8009 transitions. [2021-06-05 04:36:52,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 04:36:52,857 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:36:52,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:52,861 INFO L225 Difference]: With dead ends: 2910 [2021-06-05 04:36:52,861 INFO L226 Difference]: Without dead ends: 2910 [2021-06-05 04:36:52,861 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 691.2ms TimeCoverageRelationStatistics Valid=140, Invalid=1050, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:36:52,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2910 states. [2021-06-05 04:36:52,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2910 to 2417. [2021-06-05 04:36:52,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2417 states, 2416 states have (on average 2.8489238410596025) internal successors, (6883), 2416 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:52,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 6883 transitions. [2021-06-05 04:36:52,886 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 6883 transitions. Word has length 19 [2021-06-05 04:36:52,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:52,886 INFO L482 AbstractCegarLoop]: Abstraction has 2417 states and 6883 transitions. [2021-06-05 04:36:52,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:52,886 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 6883 transitions. [2021-06-05 04:36:52,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:52,889 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:52,889 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:53,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 571 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4325 [2021-06-05 04:36:53,089 INFO L430 AbstractCegarLoop]: === Iteration 581 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:53,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:53,089 INFO L82 PathProgramCache]: Analyzing trace with hash -599605860, now seen corresponding path program 567 times [2021-06-05 04:36:53,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:53,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970450207] [2021-06-05 04:36:53,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:53,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:53,214 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:53,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:53,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970450207] [2021-06-05 04:36:53,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970450207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:53,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898597029] [2021-06-05 04:36:53,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 572 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 572 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:53,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:36:53,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:53,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:36:53,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:53,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:53,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:53,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:36:53,387 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:53,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:53,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:53,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:36:53,391 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:53,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:53,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:53,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:36:53,394 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:53,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:53,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:36:53,398 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:53,432 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:36:53,432 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:36:53,433 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:36:53,433 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:36:53,505 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:53,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898597029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:53,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:53,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 04:36:53,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741279426] [2021-06-05 04:36:53,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:36:53,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:53,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:36:53,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:36:53,506 INFO L87 Difference]: Start difference. First operand 2417 states and 6883 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:54,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:54,125 INFO L93 Difference]: Finished difference Result 2771 states and 7716 transitions. [2021-06-05 04:36:54,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:36:54,125 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:36:54,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:54,128 INFO L225 Difference]: With dead ends: 2771 [2021-06-05 04:36:54,128 INFO L226 Difference]: Without dead ends: 2768 [2021-06-05 04:36:54,128 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 512.9ms TimeCoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:36:54,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2768 states. [2021-06-05 04:36:54,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2768 to 2419. [2021-06-05 04:36:54,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2419 states, 2418 states have (on average 2.849048800661704) internal successors, (6889), 2418 states have internal predecessors, (6889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:54,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2419 states to 2419 states and 6889 transitions. [2021-06-05 04:36:54,154 INFO L78 Accepts]: Start accepts. Automaton has 2419 states and 6889 transitions. Word has length 19 [2021-06-05 04:36:54,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:54,154 INFO L482 AbstractCegarLoop]: Abstraction has 2419 states and 6889 transitions. [2021-06-05 04:36:54,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:54,154 INFO L276 IsEmpty]: Start isEmpty. Operand 2419 states and 6889 transitions. [2021-06-05 04:36:54,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:54,156 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:54,156 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:54,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 572 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4329 [2021-06-05 04:36:54,357 INFO L430 AbstractCegarLoop]: === Iteration 582 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:54,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:54,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1118737846, now seen corresponding path program 568 times [2021-06-05 04:36:54,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:54,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610675925] [2021-06-05 04:36:54,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:54,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:54,483 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:54,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:54,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610675925] [2021-06-05 04:36:54,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610675925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:54,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530935641] [2021-06-05 04:36:54,483 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 573 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 573 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:54,512 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:36:54,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:54,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:36:54,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:54,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:54,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:54,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:36:54,652 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:54,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:54,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:54,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:36:54,656 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:54,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:54,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:54,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:36:54,659 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:54,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:54,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:36:54,662 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:54,697 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:36:54,697 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:36:54,698 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:36:54,698 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:36:54,756 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:54,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530935641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:54,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:54,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 04:36:54,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339313793] [2021-06-05 04:36:54,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:36:54,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:54,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:36:54,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:36:54,757 INFO L87 Difference]: Start difference. First operand 2419 states and 6889 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:55,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:55,152 INFO L93 Difference]: Finished difference Result 2769 states and 7714 transitions. [2021-06-05 04:36:55,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:36:55,153 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:36:55,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:55,155 INFO L225 Difference]: With dead ends: 2769 [2021-06-05 04:36:55,155 INFO L226 Difference]: Without dead ends: 2769 [2021-06-05 04:36:55,156 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 369.7ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:36:55,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2769 states. [2021-06-05 04:36:55,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2769 to 2410. [2021-06-05 04:36:55,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2410 states, 2409 states have (on average 2.8484848484848486) internal successors, (6862), 2409 states have internal predecessors, (6862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:55,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2410 states to 2410 states and 6862 transitions. [2021-06-05 04:36:55,179 INFO L78 Accepts]: Start accepts. Automaton has 2410 states and 6862 transitions. Word has length 19 [2021-06-05 04:36:55,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:55,179 INFO L482 AbstractCegarLoop]: Abstraction has 2410 states and 6862 transitions. [2021-06-05 04:36:55,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:55,179 INFO L276 IsEmpty]: Start isEmpty. Operand 2410 states and 6862 transitions. [2021-06-05 04:36:55,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:55,181 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:55,181 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:55,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4335,573 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:55,381 INFO L430 AbstractCegarLoop]: === Iteration 583 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:55,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:55,382 INFO L82 PathProgramCache]: Analyzing trace with hash -44673570, now seen corresponding path program 569 times [2021-06-05 04:36:55,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:55,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892966211] [2021-06-05 04:36:55,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:55,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:55,488 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:55,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:55,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892966211] [2021-06-05 04:36:55,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892966211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:55,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366359627] [2021-06-05 04:36:55,489 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 574 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 574 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:55,536 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:36:55,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:55,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:36:55,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:55,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:55,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:55,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:36:55,707 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:55,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:55,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:36:55,710 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:55,733 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:36:55,734 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:36:55,734 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:36:55,734 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:36:55,757 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:55,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366359627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:55,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:55,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 04:36:55,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738050349] [2021-06-05 04:36:55,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:36:55,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:55,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:36:55,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:36:55,758 INFO L87 Difference]: Start difference. First operand 2410 states and 6862 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:56,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:56,154 INFO L93 Difference]: Finished difference Result 2776 states and 7745 transitions. [2021-06-05 04:36:56,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:36:56,155 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:36:56,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:56,157 INFO L225 Difference]: With dead ends: 2776 [2021-06-05 04:36:56,157 INFO L226 Difference]: Without dead ends: 2776 [2021-06-05 04:36:56,157 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 271.3ms TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:36:56,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2776 states. [2021-06-05 04:36:56,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2776 to 2412. [2021-06-05 04:36:56,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2412 states, 2411 states have (on average 2.848610535047698) internal successors, (6868), 2411 states have internal predecessors, (6868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:56,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2412 states to 2412 states and 6868 transitions. [2021-06-05 04:36:56,181 INFO L78 Accepts]: Start accepts. Automaton has 2412 states and 6868 transitions. Word has length 19 [2021-06-05 04:36:56,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:56,181 INFO L482 AbstractCegarLoop]: Abstraction has 2412 states and 6868 transitions. [2021-06-05 04:36:56,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:56,181 INFO L276 IsEmpty]: Start isEmpty. Operand 2412 states and 6868 transitions. [2021-06-05 04:36:56,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:56,184 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:56,184 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:56,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 574 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4339 [2021-06-05 04:36:56,384 INFO L430 AbstractCegarLoop]: === Iteration 584 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:56,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:56,384 INFO L82 PathProgramCache]: Analyzing trace with hash 886209018, now seen corresponding path program 570 times [2021-06-05 04:36:56,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:56,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772888294] [2021-06-05 04:36:56,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:56,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:56,493 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:56,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:56,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772888294] [2021-06-05 04:36:56,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772888294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:56,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954761364] [2021-06-05 04:36:56,494 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 575 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 575 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:56,523 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:36:56,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:56,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:36:56,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:56,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:36:56,713 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:56,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:56,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:56,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:36:56,718 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:56,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:56,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:56,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:36:56,721 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:56,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:36:56,725 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:56,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:36:56,728 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:56,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:36:56,731 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:56,762 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-05 04:36:56,762 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:36:56,763 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:36:56,763 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-05 04:36:56,795 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:56,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954761364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:56,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:56,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 04:36:56,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106425001] [2021-06-05 04:36:56,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:36:56,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:56,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:36:56,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:36:56,795 INFO L87 Difference]: Start difference. First operand 2412 states and 6868 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:57,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:57,283 INFO L93 Difference]: Finished difference Result 2737 states and 7656 transitions. [2021-06-05 04:36:57,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:36:57,284 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:36:57,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:57,286 INFO L225 Difference]: With dead ends: 2737 [2021-06-05 04:36:57,287 INFO L226 Difference]: Without dead ends: 2729 [2021-06-05 04:36:57,287 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 473.9ms TimeCoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:36:57,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2729 states. [2021-06-05 04:36:57,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2729 to 2412. [2021-06-05 04:36:57,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2412 states, 2411 states have (on average 2.8473662380754874) internal successors, (6865), 2411 states have internal predecessors, (6865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:57,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2412 states to 2412 states and 6865 transitions. [2021-06-05 04:36:57,326 INFO L78 Accepts]: Start accepts. Automaton has 2412 states and 6865 transitions. Word has length 19 [2021-06-05 04:36:57,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:57,326 INFO L482 AbstractCegarLoop]: Abstraction has 2412 states and 6865 transitions. [2021-06-05 04:36:57,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:57,326 INFO L276 IsEmpty]: Start isEmpty. Operand 2412 states and 6865 transitions. [2021-06-05 04:36:57,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:57,328 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:57,329 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:57,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 575 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4342 [2021-06-05 04:36:57,529 INFO L430 AbstractCegarLoop]: === Iteration 585 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:57,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:57,529 INFO L82 PathProgramCache]: Analyzing trace with hash 649198238, now seen corresponding path program 571 times [2021-06-05 04:36:57,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:57,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357048047] [2021-06-05 04:36:57,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:57,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:57,650 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:57,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:57,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357048047] [2021-06-05 04:36:57,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357048047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:57,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960586697] [2021-06-05 04:36:57,650 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 576 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 576 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:57,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:57,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:36:57,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:57,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:57,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:57,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:36:57,811 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:57,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:57,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:57,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:36:57,814 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:57,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:57,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:57,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:36:57,818 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:57,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:57,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:36:57,821 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:57,856 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:36:57,856 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:36:57,857 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:36:57,857 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:36:57,936 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:57,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960586697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:57,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:57,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 04:36:57,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621423098] [2021-06-05 04:36:57,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:36:57,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:57,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:36:57,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:36:57,936 INFO L87 Difference]: Start difference. First operand 2412 states and 6865 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:59,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:36:59,006 INFO L93 Difference]: Finished difference Result 2821 states and 7840 transitions. [2021-06-05 04:36:59,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 04:36:59,007 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:36:59,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:36:59,009 INFO L225 Difference]: With dead ends: 2821 [2021-06-05 04:36:59,010 INFO L226 Difference]: Without dead ends: 2814 [2021-06-05 04:36:59,010 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 898.6ms TimeCoverageRelationStatistics Valid=196, Invalid=1696, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 04:36:59,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2814 states. [2021-06-05 04:36:59,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2814 to 2441. [2021-06-05 04:36:59,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2441 states, 2440 states have (on average 2.8540983606557377) internal successors, (6964), 2440 states have internal predecessors, (6964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:59,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2441 states to 2441 states and 6964 transitions. [2021-06-05 04:36:59,032 INFO L78 Accepts]: Start accepts. Automaton has 2441 states and 6964 transitions. Word has length 19 [2021-06-05 04:36:59,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:36:59,032 INFO L482 AbstractCegarLoop]: Abstraction has 2441 states and 6964 transitions. [2021-06-05 04:36:59,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:36:59,033 INFO L276 IsEmpty]: Start isEmpty. Operand 2441 states and 6964 transitions. [2021-06-05 04:36:59,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:36:59,035 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:36:59,035 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:36:59,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 576 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4349 [2021-06-05 04:36:59,235 INFO L430 AbstractCegarLoop]: === Iteration 586 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:36:59,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:36:59,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1995180024, now seen corresponding path program 572 times [2021-06-05 04:36:59,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:36:59,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878255883] [2021-06-05 04:36:59,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:36:59,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:36:59,340 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:59,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:36:59,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878255883] [2021-06-05 04:36:59,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878255883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:59,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025744782] [2021-06-05 04:36:59,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 577 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 577 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:36:59,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:36:59,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:36:59,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:36:59,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:36:59,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:59,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:59,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:36:59,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:59,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:36:59,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:36:59,538 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:36:59,562 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:36:59,562 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:36:59,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:36:59,563 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:36:59,586 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:36:59,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025744782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:36:59,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:36:59,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 04:36:59,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95849017] [2021-06-05 04:36:59,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:36:59,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:36:59,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:36:59,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:36:59,586 INFO L87 Difference]: Start difference. First operand 2441 states and 6964 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:00,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:00,754 INFO L93 Difference]: Finished difference Result 3027 states and 8251 transitions. [2021-06-05 04:37:00,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 04:37:00,754 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:37:00,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:00,757 INFO L225 Difference]: With dead ends: 3027 [2021-06-05 04:37:00,757 INFO L226 Difference]: Without dead ends: 3027 [2021-06-05 04:37:00,757 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 721.3ms TimeCoverageRelationStatistics Valid=234, Invalid=2216, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 04:37:00,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3027 states. [2021-06-05 04:37:00,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3027 to 2459. [2021-06-05 04:37:00,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2459 states, 2458 states have (on average 2.856387306753458) internal successors, (7021), 2458 states have internal predecessors, (7021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:00,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2459 states to 2459 states and 7021 transitions. [2021-06-05 04:37:00,784 INFO L78 Accepts]: Start accepts. Automaton has 2459 states and 7021 transitions. Word has length 19 [2021-06-05 04:37:00,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:00,784 INFO L482 AbstractCegarLoop]: Abstraction has 2459 states and 7021 transitions. [2021-06-05 04:37:00,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:00,784 INFO L276 IsEmpty]: Start isEmpty. Operand 2459 states and 7021 transitions. [2021-06-05 04:37:00,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:00,787 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:00,787 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:00,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 577 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4354 [2021-06-05 04:37:00,987 INFO L430 AbstractCegarLoop]: === Iteration 587 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:00,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:00,987 INFO L82 PathProgramCache]: Analyzing trace with hash -745738148, now seen corresponding path program 573 times [2021-06-05 04:37:00,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:00,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433841495] [2021-06-05 04:37:00,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:00,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:01,093 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:01,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:01,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433841495] [2021-06-05 04:37:01,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433841495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:01,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36603324] [2021-06-05 04:37:01,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 578 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 578 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:01,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:37:01,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:37:01,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:37:01,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:01,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:37:01,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:01,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:01,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:01,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:37:01,310 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:01,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:01,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:01,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:37:01,314 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:01,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:37:01,317 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:01,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:37:01,320 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:01,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:37:01,323 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:01,354 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-05 04:37:01,354 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:37:01,355 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:37:01,355 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-05 04:37:01,385 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:01,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36603324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:01,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:01,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 04:37:01,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645924309] [2021-06-05 04:37:01,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:37:01,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:01,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:37:01,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:37:01,386 INFO L87 Difference]: Start difference. First operand 2459 states and 7021 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:02,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:02,190 INFO L93 Difference]: Finished difference Result 2838 states and 7882 transitions. [2021-06-05 04:37:02,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 04:37:02,191 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:37:02,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:02,194 INFO L225 Difference]: With dead ends: 2838 [2021-06-05 04:37:02,194 INFO L226 Difference]: Without dead ends: 2832 [2021-06-05 04:37:02,194 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 644.1ms TimeCoverageRelationStatistics Valid=156, Invalid=1404, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 04:37:02,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2832 states. [2021-06-05 04:37:02,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2832 to 2460. [2021-06-05 04:37:02,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2460 states, 2459 states have (on average 2.854005693371289) internal successors, (7018), 2459 states have internal predecessors, (7018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:02,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2460 states to 2460 states and 7018 transitions. [2021-06-05 04:37:02,218 INFO L78 Accepts]: Start accepts. Automaton has 2460 states and 7018 transitions. Word has length 19 [2021-06-05 04:37:02,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:02,219 INFO L482 AbstractCegarLoop]: Abstraction has 2460 states and 7018 transitions. [2021-06-05 04:37:02,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:02,219 INFO L276 IsEmpty]: Start isEmpty. Operand 2460 states and 7018 transitions. [2021-06-05 04:37:02,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:02,221 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:02,221 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:02,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4357,578 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:02,421 INFO L430 AbstractCegarLoop]: === Iteration 588 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:02,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:02,422 INFO L82 PathProgramCache]: Analyzing trace with hash -444893350, now seen corresponding path program 574 times [2021-06-05 04:37:02,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:02,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717820851] [2021-06-05 04:37:02,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:02,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:02,531 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:02,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:02,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717820851] [2021-06-05 04:37:02,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717820851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:02,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102367742] [2021-06-05 04:37:02,531 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 579 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 579 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:02,560 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:37:02,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:37:02,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:37:02,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:02,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:02,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:02,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:37:02,687 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:02,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:02,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:02,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:37:02,691 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:02,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:02,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:02,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:37:02,695 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:02,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:02,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:37:02,698 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:02,733 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:37:02,733 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:37:02,733 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:37:02,733 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:37:02,811 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:02,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102367742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:02,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:02,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 04:37:02,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342467398] [2021-06-05 04:37:02,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:37:02,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:02,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:37:02,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:37:02,812 INFO L87 Difference]: Start difference. First operand 2460 states and 7018 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:03,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:03,943 INFO L93 Difference]: Finished difference Result 2982 states and 8286 transitions. [2021-06-05 04:37:03,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 04:37:03,944 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:37:03,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:03,947 INFO L225 Difference]: With dead ends: 2982 [2021-06-05 04:37:03,947 INFO L226 Difference]: Without dead ends: 2976 [2021-06-05 04:37:03,947 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 893.0ms TimeCoverageRelationStatistics Valid=223, Invalid=2033, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 04:37:03,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2976 states. [2021-06-05 04:37:03,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2976 to 2507. [2021-06-05 04:37:03,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2507 states, 2506 states have (on average 2.8591380686352754) internal successors, (7165), 2506 states have internal predecessors, (7165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:03,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2507 states to 2507 states and 7165 transitions. [2021-06-05 04:37:03,973 INFO L78 Accepts]: Start accepts. Automaton has 2507 states and 7165 transitions. Word has length 19 [2021-06-05 04:37:03,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:03,973 INFO L482 AbstractCegarLoop]: Abstraction has 2507 states and 7165 transitions. [2021-06-05 04:37:03,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:03,973 INFO L276 IsEmpty]: Start isEmpty. Operand 2507 states and 7165 transitions. [2021-06-05 04:37:03,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:03,975 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:03,975 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:04,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 579 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4364 [2021-06-05 04:37:04,176 INFO L430 AbstractCegarLoop]: === Iteration 589 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:04,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:04,176 INFO L82 PathProgramCache]: Analyzing trace with hash -987059554, now seen corresponding path program 575 times [2021-06-05 04:37:04,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:04,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803311416] [2021-06-05 04:37:04,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:04,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:04,277 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:04,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:04,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803311416] [2021-06-05 04:37:04,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803311416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:04,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260231620] [2021-06-05 04:37:04,278 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 580 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 580 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:04,308 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:37:04,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:37:04,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:37:04,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:04,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:04,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:04,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:37:04,451 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:04,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:04,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:37:04,455 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:04,478 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:37:04,479 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:37:04,479 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:37:04,479 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:37:04,502 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:04,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260231620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:04,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:04,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 04:37:04,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928033793] [2021-06-05 04:37:04,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:37:04,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:04,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:37:04,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:37:04,503 INFO L87 Difference]: Start difference. First operand 2507 states and 7165 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:05,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:05,440 INFO L93 Difference]: Finished difference Result 3168 states and 8669 transitions. [2021-06-05 04:37:05,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 04:37:05,441 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:37:05,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:05,444 INFO L225 Difference]: With dead ends: 3168 [2021-06-05 04:37:05,444 INFO L226 Difference]: Without dead ends: 3168 [2021-06-05 04:37:05,444 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 571.9ms TimeCoverageRelationStatistics Valid=191, Invalid=1879, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 04:37:05,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3168 states. [2021-06-05 04:37:05,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3168 to 2563. [2021-06-05 04:37:05,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2563 states, 2562 states have (on average 2.869242779078845) internal successors, (7351), 2562 states have internal predecessors, (7351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:05,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2563 states to 2563 states and 7351 transitions. [2021-06-05 04:37:05,472 INFO L78 Accepts]: Start accepts. Automaton has 2563 states and 7351 transitions. Word has length 19 [2021-06-05 04:37:05,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:05,472 INFO L482 AbstractCegarLoop]: Abstraction has 2563 states and 7351 transitions. [2021-06-05 04:37:05,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:05,472 INFO L276 IsEmpty]: Start isEmpty. Operand 2563 states and 7351 transitions. [2021-06-05 04:37:05,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:05,474 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:05,474 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:05,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4369,580 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:05,675 INFO L430 AbstractCegarLoop]: === Iteration 590 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:05,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:05,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1906760262, now seen corresponding path program 576 times [2021-06-05 04:37:05,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:05,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101460977] [2021-06-05 04:37:05,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:05,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:05,776 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:05,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:05,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101460977] [2021-06-05 04:37:05,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101460977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:05,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705650761] [2021-06-05 04:37:05,777 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 581 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 581 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:05,807 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:37:05,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:37:05,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:37:05,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:05,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:37:05,967 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:05,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:05,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:05,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:37:05,971 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:05,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:05,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:05,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:37:05,975 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:05,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:37:05,978 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:05,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 04:37:05,981 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:05,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 04:37:05,984 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:06,015 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-05 04:37:06,015 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:37:06,016 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:37:06,016 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-05 04:37:06,046 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:06,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705650761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:06,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:06,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 04:37:06,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319103403] [2021-06-05 04:37:06,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:37:06,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:06,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:37:06,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:37:06,047 INFO L87 Difference]: Start difference. First operand 2563 states and 7351 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:06,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:06,977 INFO L93 Difference]: Finished difference Result 2969 states and 8260 transitions. [2021-06-05 04:37:06,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 04:37:06,977 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:37:06,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:06,980 INFO L225 Difference]: With dead ends: 2969 [2021-06-05 04:37:06,980 INFO L226 Difference]: Without dead ends: 2965 [2021-06-05 04:37:06,981 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 666.4ms TimeCoverageRelationStatistics Valid=169, Invalid=1637, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 04:37:06,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2965 states. [2021-06-05 04:37:07,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2965 to 2564. [2021-06-05 04:37:07,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2564 states, 2563 states have (on average 2.865001950838861) internal successors, (7343), 2563 states have internal predecessors, (7343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:07,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2564 states to 2564 states and 7343 transitions. [2021-06-05 04:37:07,019 INFO L78 Accepts]: Start accepts. Automaton has 2564 states and 7343 transitions. Word has length 19 [2021-06-05 04:37:07,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:07,019 INFO L482 AbstractCegarLoop]: Abstraction has 2564 states and 7343 transitions. [2021-06-05 04:37:07,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:07,019 INFO L276 IsEmpty]: Start isEmpty. Operand 2564 states and 7343 transitions. [2021-06-05 04:37:07,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:07,021 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:07,021 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:07,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4372,581 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:07,222 INFO L430 AbstractCegarLoop]: === Iteration 591 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:07,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:07,222 INFO L82 PathProgramCache]: Analyzing trace with hash 628192030, now seen corresponding path program 577 times [2021-06-05 04:37:07,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:07,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844145110] [2021-06-05 04:37:07,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:07,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:07,328 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:07,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:07,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844145110] [2021-06-05 04:37:07,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844145110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:07,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827041832] [2021-06-05 04:37:07,328 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 582 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 582 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:07,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:07,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:37:07,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:07,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:07,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:07,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:37:07,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:07,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:07,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:07,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:37:07,471 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:07,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:07,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:07,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:37:07,475 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:07,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:07,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:37:07,478 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:07,513 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:37:07,513 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:37:07,514 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:37:07,514 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:37:07,592 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:07,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827041832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:07,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:07,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 04:37:07,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191566455] [2021-06-05 04:37:07,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:37:07,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:07,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:37:07,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:37:07,593 INFO L87 Difference]: Start difference. First operand 2564 states and 7343 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:08,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:08,929 INFO L93 Difference]: Finished difference Result 3112 states and 8553 transitions. [2021-06-05 04:37:08,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 04:37:08,930 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:37:08,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:08,933 INFO L225 Difference]: With dead ends: 3112 [2021-06-05 04:37:08,933 INFO L226 Difference]: Without dead ends: 3107 [2021-06-05 04:37:08,933 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 1007.1ms TimeCoverageRelationStatistics Valid=269, Invalid=2593, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 04:37:08,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3107 states. [2021-06-05 04:37:08,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3107 to 2573. [2021-06-05 04:37:08,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2573 states, 2572 states have (on average 2.8635303265940903) internal successors, (7365), 2572 states have internal predecessors, (7365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:08,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2573 states to 2573 states and 7365 transitions. [2021-06-05 04:37:08,973 INFO L78 Accepts]: Start accepts. Automaton has 2573 states and 7365 transitions. Word has length 19 [2021-06-05 04:37:08,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:08,973 INFO L482 AbstractCegarLoop]: Abstraction has 2573 states and 7365 transitions. [2021-06-05 04:37:08,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:08,973 INFO L276 IsEmpty]: Start isEmpty. Operand 2573 states and 7365 transitions. [2021-06-05 04:37:08,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:08,976 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:08,976 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:09,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4379,582 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:09,176 INFO L430 AbstractCegarLoop]: === Iteration 592 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:09,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:09,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1826233144, now seen corresponding path program 578 times [2021-06-05 04:37:09,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:09,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265942385] [2021-06-05 04:37:09,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:09,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:09,291 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:09,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:09,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265942385] [2021-06-05 04:37:09,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265942385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:09,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984125570] [2021-06-05 04:37:09,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 583 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 583 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:09,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:37:09,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:37:09,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:37:09,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:09,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:09,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:09,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:37:09,430 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:09,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:09,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:09,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:37:09,434 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:09,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:09,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:09,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:37:09,437 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:09,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:09,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:37:09,441 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:09,475 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:37:09,475 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:37:09,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:37:09,476 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:37:09,532 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:09,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984125570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:09,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:09,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 04:37:09,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248068875] [2021-06-05 04:37:09,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:37:09,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:09,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:37:09,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:37:09,533 INFO L87 Difference]: Start difference. First operand 2573 states and 7365 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:10,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:10,672 INFO L93 Difference]: Finished difference Result 3156 states and 8624 transitions. [2021-06-05 04:37:10,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 04:37:10,673 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:37:10,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:10,676 INFO L225 Difference]: With dead ends: 3156 [2021-06-05 04:37:10,676 INFO L226 Difference]: Without dead ends: 3156 [2021-06-05 04:37:10,676 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 772.6ms TimeCoverageRelationStatistics Valid=232, Invalid=2024, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 04:37:10,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3156 states. [2021-06-05 04:37:10,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3156 to 2594. [2021-06-05 04:37:10,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2594 states, 2593 states have (on average 2.866949479367528) internal successors, (7434), 2593 states have internal predecessors, (7434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:10,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2594 states to 2594 states and 7434 transitions. [2021-06-05 04:37:10,703 INFO L78 Accepts]: Start accepts. Automaton has 2594 states and 7434 transitions. Word has length 19 [2021-06-05 04:37:10,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:10,703 INFO L482 AbstractCegarLoop]: Abstraction has 2594 states and 7434 transitions. [2021-06-05 04:37:10,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:10,703 INFO L276 IsEmpty]: Start isEmpty. Operand 2594 states and 7434 transitions. [2021-06-05 04:37:10,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:10,706 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:10,706 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:10,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 583 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4384 [2021-06-05 04:37:10,906 INFO L430 AbstractCegarLoop]: === Iteration 593 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:10,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:10,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1667117924, now seen corresponding path program 579 times [2021-06-05 04:37:10,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:10,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665576947] [2021-06-05 04:37:10,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:10,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:11,037 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:11,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:11,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665576947] [2021-06-05 04:37:11,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665576947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:11,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931547930] [2021-06-05 04:37:11,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 584 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 584 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:11,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:37:11,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:37:11,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:37:11,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:11,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:11,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:11,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:37:11,181 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:11,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:11,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:11,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:37:11,185 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:11,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:11,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:11,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:37:11,188 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:11,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:11,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:37:11,192 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:11,226 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:37:11,227 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:37:11,227 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:37:11,227 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:37:11,298 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:11,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931547930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:11,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:11,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 04:37:11,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919698383] [2021-06-05 04:37:11,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:37:11,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:11,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:37:11,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:37:11,299 INFO L87 Difference]: Start difference. First operand 2594 states and 7434 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:12,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:12,812 INFO L93 Difference]: Finished difference Result 3128 states and 8611 transitions. [2021-06-05 04:37:12,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 04:37:12,812 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:37:12,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:12,815 INFO L225 Difference]: With dead ends: 3128 [2021-06-05 04:37:12,815 INFO L226 Difference]: Without dead ends: 3120 [2021-06-05 04:37:12,815 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 1012.2ms TimeCoverageRelationStatistics Valid=293, Invalid=3367, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 04:37:12,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3120 states. [2021-06-05 04:37:12,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3120 to 2635. [2021-06-05 04:37:12,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2635 states, 2634 states have (on average 2.8549734244495064) internal successors, (7520), 2634 states have internal predecessors, (7520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:12,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2635 states to 2635 states and 7520 transitions. [2021-06-05 04:37:12,843 INFO L78 Accepts]: Start accepts. Automaton has 2635 states and 7520 transitions. Word has length 19 [2021-06-05 04:37:12,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:12,843 INFO L482 AbstractCegarLoop]: Abstraction has 2635 states and 7520 transitions. [2021-06-05 04:37:12,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:12,843 INFO L276 IsEmpty]: Start isEmpty. Operand 2635 states and 7520 transitions. [2021-06-05 04:37:12,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:12,845 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:12,845 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:13,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4388,584 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:13,046 INFO L430 AbstractCegarLoop]: === Iteration 594 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:13,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:13,046 INFO L82 PathProgramCache]: Analyzing trace with hash 51225782, now seen corresponding path program 580 times [2021-06-05 04:37:13,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:13,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79105888] [2021-06-05 04:37:13,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:13,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:13,163 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:13,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:13,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79105888] [2021-06-05 04:37:13,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79105888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:13,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689964757] [2021-06-05 04:37:13,164 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 585 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 585 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:13,193 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:37:13,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:37:13,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:37:13,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:13,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:13,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:13,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:37:13,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:13,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:13,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:13,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:37:13,309 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:13,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:13,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:13,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:37:13,313 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:13,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:13,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 04:37:13,317 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:13,352 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-05 04:37:13,352 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:37:13,353 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:37:13,353 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-05 04:37:13,411 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:13,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689964757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:13,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:13,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 04:37:13,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427078353] [2021-06-05 04:37:13,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:37:13,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:13,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:37:13,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:37:13,412 INFO L87 Difference]: Start difference. First operand 2635 states and 7520 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:14,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:14,401 INFO L93 Difference]: Finished difference Result 3125 states and 8616 transitions. [2021-06-05 04:37:14,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 04:37:14,402 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:37:14,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:14,405 INFO L225 Difference]: With dead ends: 3125 [2021-06-05 04:37:14,405 INFO L226 Difference]: Without dead ends: 3125 [2021-06-05 04:37:14,405 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 697.1ms TimeCoverageRelationStatistics Valid=185, Invalid=1621, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 04:37:14,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3125 states. [2021-06-05 04:37:14,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3125 to 2631. [2021-06-05 04:37:14,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2631 states, 2630 states have (on average 2.853231939163498) internal successors, (7504), 2630 states have internal predecessors, (7504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:14,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2631 states to 2631 states and 7504 transitions. [2021-06-05 04:37:14,434 INFO L78 Accepts]: Start accepts. Automaton has 2631 states and 7504 transitions. Word has length 19 [2021-06-05 04:37:14,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:14,435 INFO L482 AbstractCegarLoop]: Abstraction has 2631 states and 7504 transitions. [2021-06-05 04:37:14,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:14,435 INFO L276 IsEmpty]: Start isEmpty. Operand 2631 states and 7504 transitions. [2021-06-05 04:37:14,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:14,437 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:14,437 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:14,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 585 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4394 [2021-06-05 04:37:14,638 INFO L430 AbstractCegarLoop]: === Iteration 595 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:14,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:14,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1659387526, now seen corresponding path program 581 times [2021-06-05 04:37:14,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:14,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002762587] [2021-06-05 04:37:14,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:14,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:14,749 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:14,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:14,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002762587] [2021-06-05 04:37:14,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002762587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:14,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436092651] [2021-06-05 04:37:14,749 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 586 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 586 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:14,796 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:37:14,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:37:14,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:37:14,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:14,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:14,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:14,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:37:14,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:14,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:14,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:37:14,928 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:14,947 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-06-05 04:37:14,947 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:37:14,948 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:37:14,948 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-06-05 04:37:14,974 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:14,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436092651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:14,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:14,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-05 04:37:14,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524880769] [2021-06-05 04:37:14,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:37:14,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:14,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:37:14,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:37:14,975 INFO L87 Difference]: Start difference. First operand 2631 states and 7504 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:15,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:15,682 INFO L93 Difference]: Finished difference Result 3189 states and 8778 transitions. [2021-06-05 04:37:15,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 04:37:15,682 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:37:15,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:15,686 INFO L225 Difference]: With dead ends: 3189 [2021-06-05 04:37:15,686 INFO L226 Difference]: Without dead ends: 3189 [2021-06-05 04:37:15,686 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 389.8ms TimeCoverageRelationStatistics Valid=110, Invalid=1080, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:37:15,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3189 states. [2021-06-05 04:37:15,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3189 to 2576. [2021-06-05 04:37:15,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2576 states, 2575 states have (on average 2.84) internal successors, (7313), 2575 states have internal predecessors, (7313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:15,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2576 states to 2576 states and 7313 transitions. [2021-06-05 04:37:15,713 INFO L78 Accepts]: Start accepts. Automaton has 2576 states and 7313 transitions. Word has length 19 [2021-06-05 04:37:15,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:15,713 INFO L482 AbstractCegarLoop]: Abstraction has 2576 states and 7313 transitions. [2021-06-05 04:37:15,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:15,713 INFO L276 IsEmpty]: Start isEmpty. Operand 2576 states and 7313 transitions. [2021-06-05 04:37:15,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:15,716 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:15,716 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:37:15,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 586 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4398 [2021-06-05 04:37:15,916 INFO L430 AbstractCegarLoop]: === Iteration 596 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:15,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:15,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1992996928, now seen corresponding path program 582 times [2021-06-05 04:37:15,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:15,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54785927] [2021-06-05 04:37:15,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:15,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:16,025 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:16,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:37:16,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54785927] [2021-06-05 04:37:16,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54785927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:16,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299761670] [2021-06-05 04:37:16,026 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 587 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 587 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:16,054 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:37:16,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:37:16,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:37:16,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:16,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:16,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:16,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 04:37:16,239 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:16,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:37:16,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 04:37:16,242 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:37:16,265 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-05 04:37:16,265 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-05 04:37:16,266 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:37:16,266 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-05 04:37:16,290 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:37:16,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299761670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:37:16,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:37:16,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-05 04:37:16,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251804063] [2021-06-05 04:37:16,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:37:16,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:37:16,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:37:16,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:37:16,291 INFO L87 Difference]: Start difference. First operand 2576 states and 7313 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:16,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:37:16,686 INFO L93 Difference]: Finished difference Result 2791 states and 7767 transitions. [2021-06-05 04:37:16,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:37:16,686 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:37:16,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:37:16,688 INFO L225 Difference]: With dead ends: 2791 [2021-06-05 04:37:16,688 INFO L226 Difference]: Without dead ends: 2791 [2021-06-05 04:37:16,689 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 249.4ms TimeCoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:37:16,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2791 states. [2021-06-05 04:37:16,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2791 to 2603. [2021-06-05 04:37:16,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.840891621829362) internal successors, (7392), 2602 states have internal predecessors, (7392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:16,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7392 transitions. [2021-06-05 04:37:16,712 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7392 transitions. Word has length 19 [2021-06-05 04:37:16,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:37:16,712 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7392 transitions. [2021-06-05 04:37:16,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:37:16,712 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7392 transitions. [2021-06-05 04:37:16,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:37:16,715 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:37:16,715 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] Received shutdown request... [2021-06-05 04:37:16,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4400,587 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:16,915 INFO L430 AbstractCegarLoop]: === Iteration 597 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:37:16,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:37:16,915 INFO L82 PathProgramCache]: Analyzing trace with hash 785586084, now seen corresponding path program 583 times [2021-06-05 04:37:16,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:37:16,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462567266] [2021-06-05 04:37:16,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:37:16,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2021-06-05 04:37:16,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [276298405] [2021-06-05 04:37:16,918 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 588 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 588 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:16,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:37:16,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 04:37:16,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:37:16,951 WARN L222 SmtUtils]: Removed 1 from assertion stack [2021-06-05 04:37:17,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4403,588 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:37:17,152 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 04:37:17,154 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 04:37:17,155 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 04:37:17,155 INFO L202 PluginConnector]: Adding new model array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 04:37:17 BasicIcfg [2021-06-05 04:37:17,155 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 04:37:17,156 INFO L168 Benchmark]: Toolchain (without parser) took 816222.54 ms. Allocated memory was 350.2 MB in the beginning and 734.0 MB in the end (delta: 383.8 MB). Free memory was 329.4 MB in the beginning and 647.4 MB in the end (delta: -318.0 MB). Peak memory consumption was 65.9 MB. Max. memory is 16.0 GB. [2021-06-05 04:37:17,156 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.16 ms. Allocated memory is still 350.2 MB. Free memory is still 330.6 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 04:37:17,156 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.03 ms. Allocated memory is still 350.2 MB. Free memory was 329.4 MB in the beginning and 327.9 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 04:37:17,156 INFO L168 Benchmark]: Boogie Preprocessor took 28.08 ms. Allocated memory is still 350.2 MB. Free memory was 327.9 MB in the beginning and 326.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 04:37:17,156 INFO L168 Benchmark]: RCFGBuilder took 402.13 ms. Allocated memory is still 350.2 MB. Free memory was 326.9 MB in the beginning and 310.0 MB in the end (delta: 16.9 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.0 GB. [2021-06-05 04:37:17,156 INFO L168 Benchmark]: TraceAbstraction took 815760.52 ms. Allocated memory was 350.2 MB in the beginning and 734.0 MB in the end (delta: 383.8 MB). Free memory was 309.6 MB in the beginning and 647.4 MB in the end (delta: -337.8 MB). Peak memory consumption was 47.1 MB. Max. memory is 16.0 GB. [2021-06-05 04:37:17,156 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.16 ms. Allocated memory is still 350.2 MB. Free memory is still 330.6 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 27.03 ms. Allocated memory is still 350.2 MB. Free memory was 329.4 MB in the beginning and 327.9 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 28.08 ms. Allocated memory is still 350.2 MB. Free memory was 327.9 MB in the beginning and 326.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 402.13 ms. Allocated memory is still 350.2 MB. Free memory was 326.9 MB in the beginning and 310.0 MB in the end (delta: 16.9 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.0 GB. * TraceAbstraction took 815760.52 ms. Allocated memory was 350.2 MB in the beginning and 734.0 MB in the end (delta: 383.8 MB). Free memory was 309.6 MB in the beginning and 647.4 MB in the end (delta: -337.8 MB). Peak memory consumption was 47.1 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 20 with TraceHistMax 5,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 0ms.. - TimeoutResultAtElement [Line: 58]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 20 with TraceHistMax 5,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 0ms.. - TimeoutResultAtElement [Line: 66]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 20 with TraceHistMax 5,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 0ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 23 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 815643.8ms, OverallIterations: 597, TraceHistogramMax: 5, EmptinessCheckTime: 701.8ms, AutomataDifference: 401327.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 14.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 17898 SDtfs, 37726 SDslu, 151154 SDs, 0 SdLazy, 329301 SolverSat, 10007 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 137910.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 23395 GetRequests, 5991 SyntacticMatches, 656 SemanticMatches, 16748 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123117 ImplicationChecksByTransitivity, 416745.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2635occurred in iteration=593, InterpolantAutomatonStates: 14694, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 7107.2ms AutomataMinimizationTime, 596 MinimizatonAttempts, 100298 StatesRemovedByMinimization, 596 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2379.7ms SsaConstructionTime, 8357.4ms SatisfiabilityAnalysisTime, 264985.9ms InterpolantComputationTime, 20102 NumberOfCodeBlocks, 20102 NumberOfCodeBlocksAsserted, 2091 NumberOfCheckSat, 18920 ConstructedInterpolants, 585 QuantifiedInterpolants, 284370 SizeOfPredicates, 3781 NumberOfNonLiveVariables, 49504 ConjunctsInSsa, 15995 ConjunctsInUnsatCore, 1182 InterpolantComputations, 10 PerfectInterpolantSequences, 2855/20012 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown