/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/popl20-more/min-array-hom.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-11 00:05:51,749 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-11 00:05:51,753 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-11 00:05:51,808 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-11 00:05:51,893 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 [2021-03-11 00:05:51,939 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-11 00:05:51,939 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-11 00:05:51,940 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-11 00:05:51,940 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-11 00:05:51,944 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-11 00:05:51,944 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-11 00:05:51,944 INFO L138 SettingsManager]: * Use SBE=true [2021-03-11 00:05:51,945 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-11 00:05:51,945 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-11 00:05:51,945 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-11 00:05:51,946 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-11 00:05:51,946 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-11 00:05:51,946 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-11 00:05:51,946 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-11 00:05:51,947 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-11 00:05:51,947 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-11 00:05:51,947 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-11 00:05:51,947 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-11 00:05:51,947 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-11 00:05:51,947 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-11 00:05:51,947 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-11 00:05:51,948 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-11 00:05:51,948 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-11 00:05:51,948 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 00:05:51,948 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-11 00:05:51,948 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-11 00:05:51,948 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-11 00:05:51,948 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-11 00:05:51,949 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-11 00:05:51,949 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-11 00:05:51,949 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-11 00:05:51,949 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-11 00:05:52,344 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-11 00:05:52,372 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-11 00:05:52,375 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-11 00:05:52,376 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-11 00:05:52,380 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-11 00:05:52,382 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-array-hom.wvr.bpl [2021-03-11 00:05:52,382 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-array-hom.wvr.bpl' [2021-03-11 00:05:52,425 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-11 00:05:52,430 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-11 00:05:52,432 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-11 00:05:52,432 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-11 00:05:52,432 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-11 00:05:52,445 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:05:52" (1/1) ... [2021-03-11 00:05:52,451 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:05:52" (1/1) ... [2021-03-11 00:05:52,460 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-11 00:05:52,461 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-11 00:05:52,461 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-11 00:05:52,461 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-11 00:05:52,467 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:05:52" (1/1) ... [2021-03-11 00:05:52,468 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:05:52" (1/1) ... [2021-03-11 00:05:52,468 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:05:52" (1/1) ... [2021-03-11 00:05:52,469 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:05:52" (1/1) ... [2021-03-11 00:05:52,472 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:05:52" (1/1) ... [2021-03-11 00:05:52,475 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:05:52" (1/1) ... [2021-03-11 00:05:52,476 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:05:52" (1/1) ... [2021-03-11 00:05:52,482 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-11 00:05:52,484 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-11 00:05:52,484 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-11 00:05:52,484 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-11 00:05:52,487 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:05:52" (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 [2021-03-11 00:05:52,563 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-11 00:05:52,564 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-11 00:05:52,564 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-11 00:05:52,564 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-11 00:05:52,564 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-11 00:05:52,564 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-11 00:05:52,564 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-11 00:05:52,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-11 00:05:52,565 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-11 00:05:52,565 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-03-11 00:05:52,565 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-03-11 00:05:52,565 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-03-11 00:05:52,566 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-11 00:05:52,769 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-11 00:05:52,769 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-11 00:05:52,771 INFO L202 PluginConnector]: Adding new model min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 12:05:52 BoogieIcfgContainer [2021-03-11 00:05:52,771 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-11 00:05:52,772 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-11 00:05:52,772 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-11 00:05:52,775 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-11 00:05:52,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:05:52" (1/2) ... [2021-03-11 00:05:52,776 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d2127b0 and model type min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 12:05:52, skipping insertion in model container [2021-03-11 00:05:52,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 12:05:52" (2/2) ... [2021-03-11 00:05:52,778 INFO L111 eAbstractionObserver]: Analyzing ICFG min-array-hom.wvr.bpl [2021-03-11 00:05:52,783 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-11 00:05:52,784 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-11 00:05:52,788 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-11 00:05:52,789 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-11 00:05:52,835 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-03-11 00:05:52,853 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-11 00:05:52,876 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 00:05:52,876 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-11 00:05:52,876 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 00:05:52,876 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 00:05:52,876 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 00:05:52,876 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 00:05:52,876 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 00:05:52,877 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 00:05:52,885 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2021-03-11 00:05:52,922 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:05:52,925 INFO L276 IsEmpty]: Start isEmpty. Operand has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:05:52,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-11 00:05:52,934 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:05:52,935 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:05:52,935 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:05:52,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:05:52,941 INFO L82 PathProgramCache]: Analyzing trace with hash -986458276, now seen corresponding path program 1 times [2021-03-11 00:05:52,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:05:52,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911822387] [2021-03-11 00:05:52,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:05:53,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:05:53,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:05:53,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911822387] [2021-03-11 00:05:53,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:05:53,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-11 00:05:53,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284016653] [2021-03-11 00:05:53,208 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-11 00:05:53,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:05:53,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-11 00:05:53,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 00:05:53,225 INFO L87 Difference]: Start difference. First operand has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 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 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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) [2021-03-11 00:05:53,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:05:53,296 INFO L93 Difference]: Finished difference Result 217 states and 617 transitions. [2021-03-11 00:05:53,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-11 00:05:53,298 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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 18 [2021-03-11 00:05:53,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:05:53,310 INFO L225 Difference]: With dead ends: 217 [2021-03-11 00:05:53,310 INFO L226 Difference]: Without dead ends: 202 [2021-03-11 00:05:53,315 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 00:05:53,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-03-11 00:05:53,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 149. [2021-03-11 00:05:53,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.831081081081081) internal successors, (419), 148 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:05:53,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 419 transitions. [2021-03-11 00:05:53,414 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 419 transitions. Word has length 18 [2021-03-11 00:05:53,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:05:53,416 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 419 transitions. [2021-03-11 00:05:53,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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) [2021-03-11 00:05:53,417 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 419 transitions. [2021-03-11 00:05:53,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-11 00:05:53,424 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:05:53,424 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:05:53,424 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-11 00:05:53,425 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:05:53,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:05:53,426 INFO L82 PathProgramCache]: Analyzing trace with hash -433058596, now seen corresponding path program 1 times [2021-03-11 00:05:53,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:05:53,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403248392] [2021-03-11 00:05:53,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:05:53,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:05:53,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:05:53,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403248392] [2021-03-11 00:05:53,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:05:53,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-11 00:05:53,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976268513] [2021-03-11 00:05:53,529 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 00:05:53,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:05:53,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 00:05:53,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-11 00:05:53,530 INFO L87 Difference]: Start difference. First operand 149 states and 419 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 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) [2021-03-11 00:05:53,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:05:53,603 INFO L93 Difference]: Finished difference Result 158 states and 445 transitions. [2021-03-11 00:05:53,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-11 00:05:53,605 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 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 20 [2021-03-11 00:05:53,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:05:53,609 INFO L225 Difference]: With dead ends: 158 [2021-03-11 00:05:53,609 INFO L226 Difference]: Without dead ends: 158 [2021-03-11 00:05:53,610 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-11 00:05:53,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-03-11 00:05:53,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 133. [2021-03-11 00:05:53,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.8333333333333335) internal successors, (374), 132 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) [2021-03-11 00:05:53,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2021-03-11 00:05:53,624 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 20 [2021-03-11 00:05:53,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:05:53,625 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2021-03-11 00:05:53,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 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) [2021-03-11 00:05:53,625 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2021-03-11 00:05:53,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-11 00:05:53,628 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:05:53,629 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:05:53,629 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-11 00:05:53,629 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:05:53,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:05:53,630 INFO L82 PathProgramCache]: Analyzing trace with hash 275548602, now seen corresponding path program 1 times [2021-03-11 00:05:53,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:05:53,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671178292] [2021-03-11 00:05:53,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:05:53,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:05:53,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:05:53,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671178292] [2021-03-11 00:05:53,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:05:53,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-11 00:05:53,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187730649] [2021-03-11 00:05:53,705 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 00:05:53,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:05:53,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 00:05:53,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-11 00:05:53,712 INFO L87 Difference]: Start difference. First operand 133 states and 374 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 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) [2021-03-11 00:05:53,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:05:53,795 INFO L93 Difference]: Finished difference Result 183 states and 522 transitions. [2021-03-11 00:05:53,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 00:05:53,798 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 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 20 [2021-03-11 00:05:53,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:05:53,800 INFO L225 Difference]: With dead ends: 183 [2021-03-11 00:05:53,801 INFO L226 Difference]: Without dead ends: 183 [2021-03-11 00:05:53,802 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-03-11 00:05:53,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-03-11 00:05:53,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2021-03-11 00:05:53,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8535031847133756) internal successors, (448), 157 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:05:53,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2021-03-11 00:05:53,819 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2021-03-11 00:05:53,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:05:53,819 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2021-03-11 00:05:53,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 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) [2021-03-11 00:05:53,820 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2021-03-11 00:05:53,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-11 00:05:53,821 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:05:53,821 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:05:53,821 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-11 00:05:53,821 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:05:53,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:05:53,822 INFO L82 PathProgramCache]: Analyzing trace with hash -483303622, now seen corresponding path program 1 times [2021-03-11 00:05:53,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:05:53,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333645652] [2021-03-11 00:05:53,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:05:53,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:05:54,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:05:54,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333645652] [2021-03-11 00:05:54,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816179185] [2021-03-11 00:05:54,367 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 [2021-03-11 00:05:54,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:05:54,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-11 00:05:54,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:05:54,798 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 23 treesize of output 15 [2021-03-11 00:05:54,802 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:54,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-03-11 00:05:54,810 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:54,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-03-11 00:05:54,818 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:54,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-03-11 00:05:54,828 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:54,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:05:54,859 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-11 00:05:54,860 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:120, output treesize:23 [2021-03-11 00:05:54,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:05:54,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:05:54,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-11 00:05:54,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228535586] [2021-03-11 00:05:54,939 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:05:54,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:05:54,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:05:54,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:05:54,940 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:05:55,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:05:55,295 INFO L93 Difference]: Finished difference Result 330 states and 935 transitions. [2021-03-11 00:05:55,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-11 00:05:55,296 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-11 00:05:55,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:05:55,300 INFO L225 Difference]: With dead ends: 330 [2021-03-11 00:05:55,300 INFO L226 Difference]: Without dead ends: 315 [2021-03-11 00:05:55,301 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 528.0ms TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:05:55,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-03-11 00:05:55,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 224. [2021-03-11 00:05:55,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.8699551569506725) internal successors, (640), 223 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:05:55,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2021-03-11 00:05:55,334 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2021-03-11 00:05:55,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:05:55,334 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2021-03-11 00:05:55,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:05:55,335 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2021-03-11 00:05:55,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-11 00:05:55,348 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:05:55,348 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:05:55,574 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:05:55,575 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:05:55,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:05:55,576 INFO L82 PathProgramCache]: Analyzing trace with hash -651112714, now seen corresponding path program 2 times [2021-03-11 00:05:55,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:05:55,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647814541] [2021-03-11 00:05:55,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:05:55,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:05:55,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:05:55,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647814541] [2021-03-11 00:05:55,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192684405] [2021-03-11 00:05:55,893 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 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 [2021-03-11 00:05:55,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:05:55,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:05:55,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-11 00:05:55,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:05:56,280 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:05:56,281 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-03-11 00:05:56,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:56,308 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:05:56,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-03-11 00:05:56,312 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:56,327 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:05:56,327 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-03-11 00:05:56,331 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:56,343 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:05:56,344 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-03-11 00:05:56,348 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:56,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:05:56,424 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-11 00:05:56,425 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:133, output treesize:122 [2021-03-11 00:05:56,547 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-03-11 00:05:56,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:05:56,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:05:56,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-03-11 00:05:56,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618780905] [2021-03-11 00:05:56,643 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:05:56,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:05:56,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:05:56,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:05:56,647 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:05:57,119 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-03-11 00:05:57,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:05:57,295 INFO L93 Difference]: Finished difference Result 374 states and 1077 transitions. [2021-03-11 00:05:57,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-11 00:05:57,296 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-11 00:05:57,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:05:57,299 INFO L225 Difference]: With dead ends: 374 [2021-03-11 00:05:57,299 INFO L226 Difference]: Without dead ends: 359 [2021-03-11 00:05:57,300 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 833.5ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:05:57,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-03-11 00:05:57,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 229. [2021-03-11 00:05:57,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.912280701754386) internal successors, (664), 228 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:05:57,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2021-03-11 00:05:57,310 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2021-03-11 00:05:57,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:05:57,311 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2021-03-11 00:05:57,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:05:57,311 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2021-03-11 00:05:57,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-11 00:05:57,312 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:05:57,313 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:05:57,539 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:05:57,539 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:05:57,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:05:57,540 INFO L82 PathProgramCache]: Analyzing trace with hash -352339266, now seen corresponding path program 3 times [2021-03-11 00:05:57,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:05:57,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866580848] [2021-03-11 00:05:57,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:05:57,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:05:57,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:05:57,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866580848] [2021-03-11 00:05:57,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137915296] [2021-03-11 00:05:57,792 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 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 [2021-03-11 00:05:57,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-11 00:05:57,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:05:57,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-11 00:05:57,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:05:58,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:05:58,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:05:58,073 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 16 treesize of output 10 [2021-03-11 00:05:58,075 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:58,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:05:58,087 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 11 treesize of output 3 [2021-03-11 00:05:58,089 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:58,133 INFO L628 ElimStorePlain]: treesize reduction 35, result has 56.8 percent of original size [2021-03-11 00:05:58,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:05:58,140 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 10 [2021-03-11 00:05:58,143 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:58,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:05:58,163 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-11 00:05:58,164 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:121, output treesize:21 [2021-03-11 00:05:58,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:05:58,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:05:58,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-11 00:05:58,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459697679] [2021-03-11 00:05:58,218 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:05:58,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:05:58,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:05:58,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:05:58,219 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:05:58,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:05:58,454 INFO L93 Difference]: Finished difference Result 296 states and 831 transitions. [2021-03-11 00:05:58,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-11 00:05:58,454 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-11 00:05:58,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:05:58,456 INFO L225 Difference]: With dead ends: 296 [2021-03-11 00:05:58,456 INFO L226 Difference]: Without dead ends: 281 [2021-03-11 00:05:58,457 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 378.9ms TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:05:58,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-03-11 00:05:58,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 241. [2021-03-11 00:05:58,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.8916666666666666) internal successors, (694), 240 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:05:58,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2021-03-11 00:05:58,466 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2021-03-11 00:05:58,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:05:58,466 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2021-03-11 00:05:58,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:05:58,466 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2021-03-11 00:05:58,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-11 00:05:58,467 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:05:58,467 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:05:58,695 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-03-11 00:05:58,695 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:05:58,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:05:58,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1218486334, now seen corresponding path program 4 times [2021-03-11 00:05:58,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:05:58,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816415893] [2021-03-11 00:05:58,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:05:58,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:05:58,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:05:58,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816415893] [2021-03-11 00:05:58,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852455379] [2021-03-11 00:05:58,922 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 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 [2021-03-11 00:05:58,983 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:05:58,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:05:58,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-11 00:05:58,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:05:59,220 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:05:59,220 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-03-11 00:05:59,222 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:59,233 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:05:59,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-03-11 00:05:59,235 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:59,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:05:59,318 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:05:59,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2021-03-11 00:05:59,320 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:59,331 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:05:59,332 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-03-11 00:05:59,343 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:05:59,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:05:59,411 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-11 00:05:59,411 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:141, output treesize:122 [2021-03-11 00:05:59,539 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-03-11 00:05:59,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:05:59,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:05:59,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-11 00:05:59,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968129867] [2021-03-11 00:05:59,611 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:05:59,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:05:59,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:05:59,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:05:59,612 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:05:59,908 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-03-11 00:06:00,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:06:00,079 INFO L93 Difference]: Finished difference Result 425 states and 1233 transitions. [2021-03-11 00:06:00,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-11 00:06:00,080 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-11 00:06:00,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:06:00,086 INFO L225 Difference]: With dead ends: 425 [2021-03-11 00:06:00,086 INFO L226 Difference]: Without dead ends: 410 [2021-03-11 00:06:00,087 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 642.1ms TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:06:00,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-03-11 00:06:00,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 247. [2021-03-11 00:06:00,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9186991869918697) internal successors, (718), 246 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:00,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2021-03-11 00:06:00,109 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2021-03-11 00:06:00,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:06:00,111 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2021-03-11 00:06:00,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:00,112 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2021-03-11 00:06:00,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:06:00,115 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:06:00,115 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:06:00,327 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-03-11 00:06:00,328 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:06:00,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:06:00,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1613936552, now seen corresponding path program 5 times [2021-03-11 00:06:00,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:06:00,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491176938] [2021-03-11 00:06:00,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:06:00,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:06:00,379 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:00,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491176938] [2021-03-11 00:06:00,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595766656] [2021-03-11 00:06:00,380 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 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 [2021-03-11 00:06:00,417 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:06:00,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:06:00,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:06:00,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:06:00,535 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:00,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:06:00,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-11 00:06:00,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134025045] [2021-03-11 00:06:00,536 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:06:00,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:06:00,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:06:00,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:06:00,537 INFO L87 Difference]: Start difference. First operand 247 states and 718 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:00,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:06:00,967 INFO L93 Difference]: Finished difference Result 619 states and 1783 transitions. [2021-03-11 00:06:00,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:06:00,968 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:06:00,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:06:00,972 INFO L225 Difference]: With dead ends: 619 [2021-03-11 00:06:00,972 INFO L226 Difference]: Without dead ends: 619 [2021-03-11 00:06:00,972 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 261.0ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-03-11 00:06:00,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-03-11 00:06:00,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 297. [2021-03-11 00:06:00,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.050675675675676) internal successors, (903), 296 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:00,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 903 transitions. [2021-03-11 00:06:00,985 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 903 transitions. Word has length 24 [2021-03-11 00:06:00,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:06:00,985 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 903 transitions. [2021-03-11 00:06:00,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:00,986 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 903 transitions. [2021-03-11 00:06:00,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:06:00,987 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:06:00,988 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:06:01,210 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-03-11 00:06:01,210 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:06:01,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:06:01,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1704711900, now seen corresponding path program 6 times [2021-03-11 00:06:01,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:06:01,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328796615] [2021-03-11 00:06:01,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:06:01,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:06:01,265 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:01,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328796615] [2021-03-11 00:06:01,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924911055] [2021-03-11 00:06:01,265 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 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 [2021-03-11 00:06:01,322 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:06:01,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:06:01,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:06:01,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:06:01,437 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:01,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:06:01,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:06:01,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495320376] [2021-03-11 00:06:01,438 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:06:01,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:06:01,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:06:01,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:06:01,439 INFO L87 Difference]: Start difference. First operand 297 states and 903 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:02,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:06:02,282 INFO L93 Difference]: Finished difference Result 1078 states and 2992 transitions. [2021-03-11 00:06:02,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-03-11 00:06:02,283 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:06:02,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:06:02,288 INFO L225 Difference]: With dead ends: 1078 [2021-03-11 00:06:02,288 INFO L226 Difference]: Without dead ends: 1078 [2021-03-11 00:06:02,289 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 553.2ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-03-11 00:06:02,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-03-11 00:06:02,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 302. [2021-03-11 00:06:02,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.083056478405316) internal successors, (928), 301 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:02,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 928 transitions. [2021-03-11 00:06:02,306 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 928 transitions. Word has length 24 [2021-03-11 00:06:02,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:06:02,306 INFO L480 AbstractCegarLoop]: Abstraction has 302 states and 928 transitions. [2021-03-11 00:06:02,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:02,307 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 928 transitions. [2021-03-11 00:06:02,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:06:02,309 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:06:02,309 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:06:02,523 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:06:02,523 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:06:02,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:06:02,524 INFO L82 PathProgramCache]: Analyzing trace with hash -2023303316, now seen corresponding path program 7 times [2021-03-11 00:06:02,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:06:02,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188065497] [2021-03-11 00:06:02,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:06:02,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:06:02,587 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:02,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188065497] [2021-03-11 00:06:02,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048643764] [2021-03-11 00:06:02,587 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 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 [2021-03-11 00:06:02,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:06:02,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:06:02,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:06:02,734 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:02,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:06:02,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:06:02,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489067167] [2021-03-11 00:06:02,735 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:06:02,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:06:02,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:06:02,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:06:02,736 INFO L87 Difference]: Start difference. First operand 302 states and 928 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:03,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:06:03,547 INFO L93 Difference]: Finished difference Result 951 states and 2692 transitions. [2021-03-11 00:06:03,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-11 00:06:03,548 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:06:03,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:06:03,554 INFO L225 Difference]: With dead ends: 951 [2021-03-11 00:06:03,554 INFO L226 Difference]: Without dead ends: 951 [2021-03-11 00:06:03,555 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 497.4ms TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-03-11 00:06:03,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-03-11 00:06:03,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 293. [2021-03-11 00:06:03,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 3.0616438356164384) internal successors, (894), 292 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:03,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 894 transitions. [2021-03-11 00:06:03,571 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 894 transitions. Word has length 24 [2021-03-11 00:06:03,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:06:03,572 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 894 transitions. [2021-03-11 00:06:03,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:03,572 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 894 transitions. [2021-03-11 00:06:03,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:06:03,573 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:06:03,573 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:06:03,790 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-03-11 00:06:03,790 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:06:03,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:06:03,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1087164644, now seen corresponding path program 1 times [2021-03-11 00:06:03,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:06:03,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998546261] [2021-03-11 00:06:03,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:06:03,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:06:03,839 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:06:03,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998546261] [2021-03-11 00:06:03,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230132011] [2021-03-11 00:06:03,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-03-11 00:06:03,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:06:03,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-11 00:06:03,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:06:03,945 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:06:03,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:06:03,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-03-11 00:06:03,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165873647] [2021-03-11 00:06:03,948 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-11 00:06:03,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:06:03,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-11 00:06:03,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-11 00:06:03,949 INFO L87 Difference]: Start difference. First operand 293 states and 894 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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) [2021-03-11 00:06:04,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:06:04,093 INFO L93 Difference]: Finished difference Result 669 states and 1943 transitions. [2021-03-11 00:06:04,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-11 00:06:04,094 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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 24 [2021-03-11 00:06:04,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:06:04,099 INFO L225 Difference]: With dead ends: 669 [2021-03-11 00:06:04,099 INFO L226 Difference]: Without dead ends: 663 [2021-03-11 00:06:04,100 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 74.5ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:06:04,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-03-11 00:06:04,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 413. [2021-03-11 00:06:04,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 3.1699029126213594) internal successors, (1306), 412 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:04,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1306 transitions. [2021-03-11 00:06:04,118 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1306 transitions. Word has length 24 [2021-03-11 00:06:04,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:06:04,118 INFO L480 AbstractCegarLoop]: Abstraction has 413 states and 1306 transitions. [2021-03-11 00:06:04,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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) [2021-03-11 00:06:04,118 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1306 transitions. [2021-03-11 00:06:04,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:06:04,121 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:06:04,121 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:06:04,347 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-03-11 00:06:04,348 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:06:04,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:06:04,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1524133352, now seen corresponding path program 8 times [2021-03-11 00:06:04,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:06:04,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923757819] [2021-03-11 00:06:04,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:06:04,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:06:04,404 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:04,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923757819] [2021-03-11 00:06:04,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245303500] [2021-03-11 00:06:04,405 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 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 [2021-03-11 00:06:04,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:06:04,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:06:04,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:06:04,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:06:04,533 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:04,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:06:04,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-11 00:06:04,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088983474] [2021-03-11 00:06:04,534 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:06:04,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:06:04,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:06:04,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:06:04,534 INFO L87 Difference]: Start difference. First operand 413 states and 1306 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:04,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:06:04,745 INFO L93 Difference]: Finished difference Result 710 states and 2124 transitions. [2021-03-11 00:06:04,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-11 00:06:04,746 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:06:04,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:06:04,750 INFO L225 Difference]: With dead ends: 710 [2021-03-11 00:06:04,750 INFO L226 Difference]: Without dead ends: 672 [2021-03-11 00:06:04,751 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 171.0ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-03-11 00:06:04,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-03-11 00:06:04,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 515. [2021-03-11 00:06:04,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 3.17704280155642) internal successors, (1633), 514 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:04,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1633 transitions. [2021-03-11 00:06:04,776 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1633 transitions. Word has length 24 [2021-03-11 00:06:04,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:06:04,776 INFO L480 AbstractCegarLoop]: Abstraction has 515 states and 1633 transitions. [2021-03-11 00:06:04,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:04,777 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1633 transitions. [2021-03-11 00:06:04,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:06:04,779 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:06:04,779 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:06:04,999 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-03-11 00:06:04,999 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:06:04,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:06:05,000 INFO L82 PathProgramCache]: Analyzing trace with hash 2064876612, now seen corresponding path program 2 times [2021-03-11 00:06:05,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:06:05,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566109921] [2021-03-11 00:06:05,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:06:05,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:06:05,029 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:06:05,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566109921] [2021-03-11 00:06:05,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009743544] [2021-03-11 00:06:05,030 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 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 [2021-03-11 00:06:05,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:06:05,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:06:05,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-11 00:06:05,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:06:05,127 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:06:05,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:06:05,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-03-11 00:06:05,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122190938] [2021-03-11 00:06:05,127 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-11 00:06:05,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:06:05,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-11 00:06:05,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-11 00:06:05,128 INFO L87 Difference]: Start difference. First operand 515 states and 1633 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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) [2021-03-11 00:06:05,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:06:05,250 INFO L93 Difference]: Finished difference Result 830 states and 2453 transitions. [2021-03-11 00:06:05,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-11 00:06:05,251 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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 24 [2021-03-11 00:06:05,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:06:05,256 INFO L225 Difference]: With dead ends: 830 [2021-03-11 00:06:05,256 INFO L226 Difference]: Without dead ends: 830 [2021-03-11 00:06:05,256 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 78.6ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:06:05,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-03-11 00:06:05,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 530. [2021-03-11 00:06:05,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 3.153119092627599) internal successors, (1668), 529 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) [2021-03-11 00:06:05,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1668 transitions. [2021-03-11 00:06:05,285 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1668 transitions. Word has length 24 [2021-03-11 00:06:05,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:06:05,285 INFO L480 AbstractCegarLoop]: Abstraction has 530 states and 1668 transitions. [2021-03-11 00:06:05,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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) [2021-03-11 00:06:05,285 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1668 transitions. [2021-03-11 00:06:05,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:06:05,287 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:06:05,288 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:06:05,503 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:06:05,504 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:06:05,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:06:05,504 INFO L82 PathProgramCache]: Analyzing trace with hash 718195046, now seen corresponding path program 9 times [2021-03-11 00:06:05,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:06:05,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103020052] [2021-03-11 00:06:05,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:06:05,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:06:05,549 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:05,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103020052] [2021-03-11 00:06:05,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515436359] [2021-03-11 00:06:05,549 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 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 [2021-03-11 00:06:05,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:06:05,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:06:05,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:06:05,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:06:05,656 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:05,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:06:05,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-11 00:06:05,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793736692] [2021-03-11 00:06:05,658 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:06:05,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:06:05,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:06:05,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:06:05,658 INFO L87 Difference]: Start difference. First operand 530 states and 1668 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-03-11 00:06:06,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:06:06,029 INFO L93 Difference]: Finished difference Result 1196 states and 3492 transitions. [2021-03-11 00:06:06,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-11 00:06:06,030 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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 24 [2021-03-11 00:06:06,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:06:06,036 INFO L225 Difference]: With dead ends: 1196 [2021-03-11 00:06:06,037 INFO L226 Difference]: Without dead ends: 1196 [2021-03-11 00:06:06,037 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 182.9ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-03-11 00:06:06,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-03-11 00:06:06,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 542. [2021-03-11 00:06:06,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 3.1497227356746764) internal successors, (1704), 541 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:06,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1704 transitions. [2021-03-11 00:06:06,064 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1704 transitions. Word has length 24 [2021-03-11 00:06:06,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:06:06,064 INFO L480 AbstractCegarLoop]: Abstraction has 542 states and 1704 transitions. [2021-03-11 00:06:06,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-03-11 00:06:06,065 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1704 transitions. [2021-03-11 00:06:06,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:06:06,068 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:06:06,068 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:06:06,287 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-03-11 00:06:06,287 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:06:06,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:06:06,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1503109140, now seen corresponding path program 10 times [2021-03-11 00:06:06,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:06:06,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304451804] [2021-03-11 00:06:06,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:06:06,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:06:06,349 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:06,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304451804] [2021-03-11 00:06:06,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564361448] [2021-03-11 00:06:06,349 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 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 [2021-03-11 00:06:06,373 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:06:06,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:06:06,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:06:06,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:06:06,451 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:06,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:06:06,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-11 00:06:06,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159480353] [2021-03-11 00:06:06,452 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:06:06,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:06:06,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:06:06,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:06:06,453 INFO L87 Difference]: Start difference. First operand 542 states and 1704 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-03-11 00:06:06,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:06:06,922 INFO L93 Difference]: Finished difference Result 1492 states and 4245 transitions. [2021-03-11 00:06:06,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-11 00:06:06,923 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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 24 [2021-03-11 00:06:06,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:06:06,931 INFO L225 Difference]: With dead ends: 1492 [2021-03-11 00:06:06,931 INFO L226 Difference]: Without dead ends: 1492 [2021-03-11 00:06:06,932 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 269.1ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-03-11 00:06:06,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-03-11 00:06:06,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 586. [2021-03-11 00:06:06,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 3.1555555555555554) internal successors, (1846), 585 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:06,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1846 transitions. [2021-03-11 00:06:06,969 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1846 transitions. Word has length 24 [2021-03-11 00:06:06,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:06:06,969 INFO L480 AbstractCegarLoop]: Abstraction has 586 states and 1846 transitions. [2021-03-11 00:06:06,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-03-11 00:06:06,969 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1846 transitions. [2021-03-11 00:06:06,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:06:06,972 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:06:06,972 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:06:07,187 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:06:07,187 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:06:07,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:06:07,188 INFO L82 PathProgramCache]: Analyzing trace with hash 420086484, now seen corresponding path program 11 times [2021-03-11 00:06:07,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:06:07,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115103465] [2021-03-11 00:06:07,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:06:07,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:06:07,241 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:07,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115103465] [2021-03-11 00:06:07,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343243314] [2021-03-11 00:06:07,242 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 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 [2021-03-11 00:06:07,270 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:06:07,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:06:07,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:06:07,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:06:07,375 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:07,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:06:07,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-11 00:06:07,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601891911] [2021-03-11 00:06:07,376 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:06:07,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:06:07,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:06:07,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:06:07,377 INFO L87 Difference]: Start difference. First operand 586 states and 1846 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:07,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:06:07,684 INFO L93 Difference]: Finished difference Result 1258 states and 3765 transitions. [2021-03-11 00:06:07,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-11 00:06:07,685 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:06:07,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:06:07,692 INFO L225 Difference]: With dead ends: 1258 [2021-03-11 00:06:07,692 INFO L226 Difference]: Without dead ends: 1248 [2021-03-11 00:06:07,693 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 194.1ms TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-03-11 00:06:07,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-03-11 00:06:07,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 758. [2021-03-11 00:06:07,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 3.224570673712021) internal successors, (2441), 757 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:07,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2441 transitions. [2021-03-11 00:06:07,726 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2441 transitions. Word has length 24 [2021-03-11 00:06:07,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:06:07,726 INFO L480 AbstractCegarLoop]: Abstraction has 758 states and 2441 transitions. [2021-03-11 00:06:07,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:07,726 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2441 transitions. [2021-03-11 00:06:07,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:06:07,729 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:06:07,729 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:06:07,955 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-03-11 00:06:07,955 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:06:07,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:06:07,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1891164602, now seen corresponding path program 12 times [2021-03-11 00:06:07,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:06:07,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577627850] [2021-03-11 00:06:07,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:06:07,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:06:08,002 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:08,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577627850] [2021-03-11 00:06:08,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362561215] [2021-03-11 00:06:08,002 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:06:08,034 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:06:08,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:06:08,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:06:08,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:06:08,125 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:08,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:06:08,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-11 00:06:08,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676162741] [2021-03-11 00:06:08,126 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:06:08,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:06:08,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:06:08,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:06:08,127 INFO L87 Difference]: Start difference. First operand 758 states and 2441 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:08,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:06:08,407 INFO L93 Difference]: Finished difference Result 1329 states and 4025 transitions. [2021-03-11 00:06:08,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-11 00:06:08,408 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:06:08,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:06:08,415 INFO L225 Difference]: With dead ends: 1329 [2021-03-11 00:06:08,415 INFO L226 Difference]: Without dead ends: 1329 [2021-03-11 00:06:08,416 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 195.1ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-03-11 00:06:08,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-03-11 00:06:08,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 764. [2021-03-11 00:06:08,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 3.220183486238532) internal successors, (2457), 763 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:08,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2457 transitions. [2021-03-11 00:06:08,449 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2457 transitions. Word has length 24 [2021-03-11 00:06:08,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:06:08,450 INFO L480 AbstractCegarLoop]: Abstraction has 764 states and 2457 transitions. [2021-03-11 00:06:08,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:08,450 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2457 transitions. [2021-03-11 00:06:08,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:06:08,453 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:06:08,453 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:06:08,675 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:06:08,675 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:06:08,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:06:08,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1458287998, now seen corresponding path program 13 times [2021-03-11 00:06:08,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:06:08,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741118314] [2021-03-11 00:06:08,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:06:08,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:06:08,736 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:08,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741118314] [2021-03-11 00:06:08,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657601670] [2021-03-11 00:06:08,737 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 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 [2021-03-11 00:06:08,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:06:08,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:06:08,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:06:08,830 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:08,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:06:08,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-11 00:06:08,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568072706] [2021-03-11 00:06:08,831 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:06:08,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:06:08,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:06:08,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:06:08,831 INFO L87 Difference]: Start difference. First operand 764 states and 2457 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-03-11 00:06:09,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:06:09,215 INFO L93 Difference]: Finished difference Result 1548 states and 4638 transitions. [2021-03-11 00:06:09,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-11 00:06:09,216 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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 24 [2021-03-11 00:06:09,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:06:09,225 INFO L225 Difference]: With dead ends: 1548 [2021-03-11 00:06:09,225 INFO L226 Difference]: Without dead ends: 1544 [2021-03-11 00:06:09,226 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 218.9ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:06:09,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-03-11 00:06:09,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 772. [2021-03-11 00:06:09,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.204928664072633) internal successors, (2471), 771 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:09,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2471 transitions. [2021-03-11 00:06:09,284 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2471 transitions. Word has length 24 [2021-03-11 00:06:09,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:06:09,285 INFO L480 AbstractCegarLoop]: Abstraction has 772 states and 2471 transitions. [2021-03-11 00:06:09,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 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) [2021-03-11 00:06:09,285 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2471 transitions. [2021-03-11 00:06:09,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:06:09,288 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:06:09,288 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:06:09,503 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-03-11 00:06:09,503 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:06:09,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:06:09,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1186278808, now seen corresponding path program 14 times [2021-03-11 00:06:09,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:06:09,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986203219] [2021-03-11 00:06:09,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:06:09,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:06:09,560 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:09,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986203219] [2021-03-11 00:06:09,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772445219] [2021-03-11 00:06:09,560 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 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 [2021-03-11 00:06:09,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:06:09,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:06:09,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:06:09,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:06:09,722 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:09,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:06:09,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:06:09,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578125503] [2021-03-11 00:06:09,723 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:06:09,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:06:09,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:06:09,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:06:09,724 INFO L87 Difference]: Start difference. First operand 772 states and 2471 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:10,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:06:10,624 INFO L93 Difference]: Finished difference Result 2734 states and 8136 transitions. [2021-03-11 00:06:10,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-03-11 00:06:10,625 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:06:10,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:06:10,640 INFO L225 Difference]: With dead ends: 2734 [2021-03-11 00:06:10,641 INFO L226 Difference]: Without dead ends: 2734 [2021-03-11 00:06:10,642 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 524.1ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-03-11 00:06:10,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2021-03-11 00:06:10,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 841. [2021-03-11 00:06:10,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 3.3107142857142855) internal successors, (2781), 840 states have internal predecessors, (2781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:10,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2781 transitions. [2021-03-11 00:06:10,706 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2781 transitions. Word has length 24 [2021-03-11 00:06:10,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:06:10,706 INFO L480 AbstractCegarLoop]: Abstraction has 841 states and 2781 transitions. [2021-03-11 00:06:10,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:10,707 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2781 transitions. [2021-03-11 00:06:10,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:06:10,710 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:06:10,710 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:06:10,923 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:06:10,923 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:06:10,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:06:10,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1753230888, now seen corresponding path program 15 times [2021-03-11 00:06:10,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:06:10,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378673215] [2021-03-11 00:06:10,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:06:10,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:06:10,970 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:10,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378673215] [2021-03-11 00:06:10,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755948639] [2021-03-11 00:06:10,971 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 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 [2021-03-11 00:06:10,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:06:10,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:06:10,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:06:10,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:06:11,120 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:11,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:06:11,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:06:11,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708267110] [2021-03-11 00:06:11,121 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:06:11,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:06:11,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:06:11,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:06:11,122 INFO L87 Difference]: Start difference. First operand 841 states and 2781 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:11,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:06:11,938 INFO L93 Difference]: Finished difference Result 2693 states and 8043 transitions. [2021-03-11 00:06:11,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-03-11 00:06:11,939 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:06:11,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:06:11,953 INFO L225 Difference]: With dead ends: 2693 [2021-03-11 00:06:11,953 INFO L226 Difference]: Without dead ends: 2693 [2021-03-11 00:06:11,954 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 497.8ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-03-11 00:06:11,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-03-11 00:06:11,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 831. [2021-03-11 00:06:12,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 3.289156626506024) internal successors, (2730), 830 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:12,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2730 transitions. [2021-03-11 00:06:12,005 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2730 transitions. Word has length 24 [2021-03-11 00:06:12,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:06:12,006 INFO L480 AbstractCegarLoop]: Abstraction has 831 states and 2730 transitions. [2021-03-11 00:06:12,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:12,006 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2730 transitions. [2021-03-11 00:06:12,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:06:12,009 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:06:12,009 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:06:12,222 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-03-11 00:06:12,222 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:06:12,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:06:12,223 INFO L82 PathProgramCache]: Analyzing trace with hash 580885030, now seen corresponding path program 16 times [2021-03-11 00:06:12,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:06:12,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35111265] [2021-03-11 00:06:12,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:06:12,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:06:12,269 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:12,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35111265] [2021-03-11 00:06:12,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415848944] [2021-03-11 00:06:12,269 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 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 [2021-03-11 00:06:12,290 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:06:12,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:06:12,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:06:12,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:06:12,384 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:12,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:06:12,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-11 00:06:12,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838908529] [2021-03-11 00:06:12,385 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:06:12,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:06:12,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:06:12,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:06:12,385 INFO L87 Difference]: Start difference. First operand 831 states and 2730 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:13,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:06:13,057 INFO L93 Difference]: Finished difference Result 2677 states and 7780 transitions. [2021-03-11 00:06:13,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-03-11 00:06:13,058 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:06:13,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:06:13,067 INFO L225 Difference]: With dead ends: 2677 [2021-03-11 00:06:13,067 INFO L226 Difference]: Without dead ends: 2677 [2021-03-11 00:06:13,068 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 379.9ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-03-11 00:06:13,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-03-11 00:06:13,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 845. [2021-03-11 00:06:13,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2997630331753554) internal successors, (2785), 844 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:13,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2785 transitions. [2021-03-11 00:06:13,114 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2785 transitions. Word has length 24 [2021-03-11 00:06:13,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:06:13,114 INFO L480 AbstractCegarLoop]: Abstraction has 845 states and 2785 transitions. [2021-03-11 00:06:13,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:13,115 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2785 transitions. [2021-03-11 00:06:13,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:06:13,118 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:06:13,118 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:06:13,331 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-03-11 00:06:13,331 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:06:13,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:06:13,332 INFO L82 PathProgramCache]: Analyzing trace with hash 662261118, now seen corresponding path program 17 times [2021-03-11 00:06:13,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:06:13,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683462308] [2021-03-11 00:06:13,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:06:13,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:06:13,377 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:13,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683462308] [2021-03-11 00:06:13,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847257801] [2021-03-11 00:06:13,377 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:06:13,406 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-11 00:06:13,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:06:13,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:06:13,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:06:13,490 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:13,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:06:13,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-11 00:06:13,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044099674] [2021-03-11 00:06:13,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:06:13,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:06:13,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:06:13,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:06:13,492 INFO L87 Difference]: Start difference. First operand 845 states and 2785 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:14,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:06:14,143 INFO L93 Difference]: Finished difference Result 2474 states and 7308 transitions. [2021-03-11 00:06:14,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-11 00:06:14,144 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:06:14,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:06:14,150 INFO L225 Difference]: With dead ends: 2474 [2021-03-11 00:06:14,150 INFO L226 Difference]: Without dead ends: 2470 [2021-03-11 00:06:14,151 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 362.9ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-03-11 00:06:14,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-03-11 00:06:14,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 845. [2021-03-11 00:06:14,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2973933649289098) internal successors, (2783), 844 states have internal predecessors, (2783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:14,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2783 transitions. [2021-03-11 00:06:14,196 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2783 transitions. Word has length 24 [2021-03-11 00:06:14,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:06:14,196 INFO L480 AbstractCegarLoop]: Abstraction has 845 states and 2783 transitions. [2021-03-11 00:06:14,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:14,196 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2783 transitions. [2021-03-11 00:06:14,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:06:14,199 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:06:14,199 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:06:14,425 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-03-11 00:06:14,426 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:06:14,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:06:14,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1592918334, now seen corresponding path program 18 times [2021-03-11 00:06:14,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:06:14,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755565001] [2021-03-11 00:06:14,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:06:14,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:06:14,472 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:14,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755565001] [2021-03-11 00:06:14,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509745019] [2021-03-11 00:06:14,472 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 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 [2021-03-11 00:06:14,515 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-11 00:06:14,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:06:14,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:06:14,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:06:14,616 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:14,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:06:14,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:06:14,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502639447] [2021-03-11 00:06:14,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:06:14,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:06:14,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:06:14,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:06:14,617 INFO L87 Difference]: Start difference. First operand 845 states and 2783 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:15,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:06:15,342 INFO L93 Difference]: Finished difference Result 2514 states and 7408 transitions. [2021-03-11 00:06:15,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-03-11 00:06:15,355 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:06:15,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:06:15,364 INFO L225 Difference]: With dead ends: 2514 [2021-03-11 00:06:15,365 INFO L226 Difference]: Without dead ends: 2514 [2021-03-11 00:06:15,366 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 402.1ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-03-11 00:06:15,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-03-11 00:06:15,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 853. [2021-03-11 00:06:15,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.3039906103286385) internal successors, (2815), 852 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:15,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2815 transitions. [2021-03-11 00:06:15,410 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2815 transitions. Word has length 24 [2021-03-11 00:06:15,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:06:15,410 INFO L480 AbstractCegarLoop]: Abstraction has 853 states and 2815 transitions. [2021-03-11 00:06:15,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:15,411 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2815 transitions. [2021-03-11 00:06:15,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:06:15,414 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:06:15,414 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:06:15,639 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-03-11 00:06:15,639 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:06:15,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:06:15,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1059009808, now seen corresponding path program 19 times [2021-03-11 00:06:15,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:06:15,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859004172] [2021-03-11 00:06:15,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:06:15,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:06:15,686 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:15,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859004172] [2021-03-11 00:06:15,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232096412] [2021-03-11 00:06:15,687 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:06:15,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:06:15,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:06:15,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:06:15,817 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:15,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:06:15,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:06:15,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620626948] [2021-03-11 00:06:15,819 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:06:15,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:06:15,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:06:15,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:06:15,820 INFO L87 Difference]: Start difference. First operand 853 states and 2815 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:16,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:06:16,544 INFO L93 Difference]: Finished difference Result 2332 states and 6984 transitions. [2021-03-11 00:06:16,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-11 00:06:16,544 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:06:16,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:06:16,553 INFO L225 Difference]: With dead ends: 2332 [2021-03-11 00:06:16,553 INFO L226 Difference]: Without dead ends: 2328 [2021-03-11 00:06:16,553 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 411.6ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-03-11 00:06:16,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-03-11 00:06:16,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 853. [2021-03-11 00:06:16,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.301643192488263) internal successors, (2813), 852 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:16,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2813 transitions. [2021-03-11 00:06:16,596 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2813 transitions. Word has length 24 [2021-03-11 00:06:16,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:06:16,596 INFO L480 AbstractCegarLoop]: Abstraction has 853 states and 2813 transitions. [2021-03-11 00:06:16,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:16,596 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2813 transitions. [2021-03-11 00:06:16,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:06:16,600 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:06:16,600 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:06:16,815 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:06:16,815 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:06:16,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:06:16,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1971295360, now seen corresponding path program 3 times [2021-03-11 00:06:16,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:06:16,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486926769] [2021-03-11 00:06:16,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:06:16,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:06:16,852 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:06:16,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486926769] [2021-03-11 00:06:16,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905101418] [2021-03-11 00:06:16,853 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:06:16,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-11 00:06:16,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:06:16,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:06:16,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:06:16,942 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:06:16,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:06:16,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-03-11 00:06:16,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696026262] [2021-03-11 00:06:16,943 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-11 00:06:16,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:06:16,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-11 00:06:16,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-03-11 00:06:16,944 INFO L87 Difference]: Start difference. First operand 853 states and 2813 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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) [2021-03-11 00:06:17,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:06:17,034 INFO L93 Difference]: Finished difference Result 929 states and 3034 transitions. [2021-03-11 00:06:17,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-11 00:06:17,035 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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 24 [2021-03-11 00:06:17,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:06:17,038 INFO L225 Difference]: With dead ends: 929 [2021-03-11 00:06:17,038 INFO L226 Difference]: Without dead ends: 929 [2021-03-11 00:06:17,038 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 66.0ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:06:17,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-03-11 00:06:17,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 780. [2021-03-11 00:06:17,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 3.3029525032092426) internal successors, (2573), 779 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:17,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2573 transitions. [2021-03-11 00:06:17,061 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2573 transitions. Word has length 24 [2021-03-11 00:06:17,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:06:17,061 INFO L480 AbstractCegarLoop]: Abstraction has 780 states and 2573 transitions. [2021-03-11 00:06:17,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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) [2021-03-11 00:06:17,062 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2573 transitions. [2021-03-11 00:06:17,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:06:17,065 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:06:17,065 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:06:17,285 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:06:17,286 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:06:17,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:06:17,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1041095616, now seen corresponding path program 20 times [2021-03-11 00:06:17,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:06:17,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65837139] [2021-03-11 00:06:17,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:06:17,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:06:17,337 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:17,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65837139] [2021-03-11 00:06:17,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379361434] [2021-03-11 00:06:17,337 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 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 [2021-03-11 00:06:17,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:06:17,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:06:17,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:06:17,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:06:17,471 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:17,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:06:17,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-03-11 00:06:17,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052957001] [2021-03-11 00:06:17,474 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-11 00:06:17,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:06:17,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-11 00:06:17,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-03-11 00:06:17,476 INFO L87 Difference]: Start difference. First operand 780 states and 2573 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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) [2021-03-11 00:06:17,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:06:17,798 INFO L93 Difference]: Finished difference Result 1555 states and 4761 transitions. [2021-03-11 00:06:17,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:06:17,798 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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 24 [2021-03-11 00:06:17,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:06:17,804 INFO L225 Difference]: With dead ends: 1555 [2021-03-11 00:06:17,804 INFO L226 Difference]: Without dead ends: 1555 [2021-03-11 00:06:17,805 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 174.7ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-03-11 00:06:17,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-03-11 00:06:17,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 842. [2021-03-11 00:06:17,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 3.296076099881094) internal successors, (2772), 841 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:17,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2772 transitions. [2021-03-11 00:06:17,837 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2772 transitions. Word has length 24 [2021-03-11 00:06:17,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:06:17,837 INFO L480 AbstractCegarLoop]: Abstraction has 842 states and 2772 transitions. [2021-03-11 00:06:17,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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) [2021-03-11 00:06:17,838 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2772 transitions. [2021-03-11 00:06:17,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:06:17,841 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:06:17,841 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:06:18,067 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-03-11 00:06:18,067 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:06:18,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:06:18,068 INFO L82 PathProgramCache]: Analyzing trace with hash 861583836, now seen corresponding path program 21 times [2021-03-11 00:06:18,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:06:18,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044392348] [2021-03-11 00:06:18,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:06:18,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:06:18,107 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:18,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044392348] [2021-03-11 00:06:18,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125174247] [2021-03-11 00:06:18,108 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 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 [2021-03-11 00:06:18,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:06:18,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:06:18,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:06:18,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:06:18,188 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:18,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:06:18,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-03-11 00:06:18,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609306281] [2021-03-11 00:06:18,188 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-11 00:06:18,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:06:18,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-11 00:06:18,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-03-11 00:06:18,191 INFO L87 Difference]: Start difference. First operand 842 states and 2772 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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) [2021-03-11 00:06:18,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:06:18,466 INFO L93 Difference]: Finished difference Result 1605 states and 4891 transitions. [2021-03-11 00:06:18,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-11 00:06:18,467 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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 24 [2021-03-11 00:06:18,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:06:18,471 INFO L225 Difference]: With dead ends: 1605 [2021-03-11 00:06:18,471 INFO L226 Difference]: Without dead ends: 1605 [2021-03-11 00:06:18,471 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 156.4ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-03-11 00:06:18,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-03-11 00:06:18,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 896. [2021-03-11 00:06:18,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.2905027932960893) internal successors, (2945), 895 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:18,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2945 transitions. [2021-03-11 00:06:18,501 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2945 transitions. Word has length 24 [2021-03-11 00:06:18,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:06:18,501 INFO L480 AbstractCegarLoop]: Abstraction has 896 states and 2945 transitions. [2021-03-11 00:06:18,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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) [2021-03-11 00:06:18,501 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2945 transitions. [2021-03-11 00:06:18,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:06:18,505 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:06:18,505 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:06:18,719 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:06:18,719 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:06:18,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:06:18,720 INFO L82 PathProgramCache]: Analyzing trace with hash 816762694, now seen corresponding path program 22 times [2021-03-11 00:06:18,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:06:18,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620862979] [2021-03-11 00:06:18,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:06:18,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:06:18,778 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:06:18,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620862979] [2021-03-11 00:06:18,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143320600] [2021-03-11 00:06:18,779 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 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 [2021-03-11 00:06:18,799 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:06:18,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:06:18,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:06:18,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:06:18,847 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:06:18,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:06:18,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-03-11 00:06:18,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963368826] [2021-03-11 00:06:18,848 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-11 00:06:18,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:06:18,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-11 00:06:18,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-03-11 00:06:18,849 INFO L87 Difference]: Start difference. First operand 896 states and 2945 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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) [2021-03-11 00:06:19,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:06:19,061 INFO L93 Difference]: Finished difference Result 1524 states and 4690 transitions. [2021-03-11 00:06:19,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-11 00:06:19,061 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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 24 [2021-03-11 00:06:19,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:06:19,067 INFO L225 Difference]: With dead ends: 1524 [2021-03-11 00:06:19,067 INFO L226 Difference]: Without dead ends: 1520 [2021-03-11 00:06:19,067 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 130.3ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:06:19,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-03-11 00:06:19,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 896. [2021-03-11 00:06:19,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.288268156424581) internal successors, (2943), 895 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:19,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2943 transitions. [2021-03-11 00:06:19,098 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2943 transitions. Word has length 24 [2021-03-11 00:06:19,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:06:19,098 INFO L480 AbstractCegarLoop]: Abstraction has 896 states and 2943 transitions. [2021-03-11 00:06:19,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 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) [2021-03-11 00:06:19,098 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2943 transitions. [2021-03-11 00:06:19,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:06:19,101 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:06:19,101 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:06:19,315 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-03-11 00:06:19,315 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:06:19,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:06:19,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1414099352, now seen corresponding path program 23 times [2021-03-11 00:06:19,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:06:19,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529454683] [2021-03-11 00:06:19,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:06:19,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:06:19,361 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:19,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529454683] [2021-03-11 00:06:19,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320266168] [2021-03-11 00:06:19,362 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 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 [2021-03-11 00:06:19,384 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:06:19,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:06:19,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:06:19,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:06:19,437 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:19,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:06:19,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-03-11 00:06:19,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535855646] [2021-03-11 00:06:19,437 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-11 00:06:19,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:06:19,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-11 00:06:19,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-03-11 00:06:19,438 INFO L87 Difference]: Start difference. First operand 896 states and 2943 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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) [2021-03-11 00:06:19,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:06:19,743 INFO L93 Difference]: Finished difference Result 1508 states and 4652 transitions. [2021-03-11 00:06:19,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-11 00:06:19,743 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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 24 [2021-03-11 00:06:19,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:06:19,747 INFO L225 Difference]: With dead ends: 1508 [2021-03-11 00:06:19,748 INFO L226 Difference]: Without dead ends: 1496 [2021-03-11 00:06:19,748 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 164.4ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-03-11 00:06:19,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-03-11 00:06:19,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 904. [2021-03-11 00:06:19,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 3.276854928017719) internal successors, (2959), 903 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:19,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2959 transitions. [2021-03-11 00:06:19,779 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2959 transitions. Word has length 24 [2021-03-11 00:06:19,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:06:19,779 INFO L480 AbstractCegarLoop]: Abstraction has 904 states and 2959 transitions. [2021-03-11 00:06:19,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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) [2021-03-11 00:06:19,779 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2959 transitions. [2021-03-11 00:06:19,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:06:19,782 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:06:19,782 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:06:20,007 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-03-11 00:06:20,007 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:06:20,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:06:20,008 INFO L82 PathProgramCache]: Analyzing trace with hash 887679068, now seen corresponding path program 24 times [2021-03-11 00:06:20,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:06:20,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950960491] [2021-03-11 00:06:20,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:06:20,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:06:20,066 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:20,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950960491] [2021-03-11 00:06:20,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673628842] [2021-03-11 00:06:20,067 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 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 [2021-03-11 00:06:20,093 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:06:20,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:06:20,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:06:20,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:06:20,200 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:20,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:06:20,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:06:20,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482460542] [2021-03-11 00:06:20,202 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:06:20,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:06:20,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:06:20,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:06:20,203 INFO L87 Difference]: Start difference. First operand 904 states and 2959 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:20,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:06:20,845 INFO L93 Difference]: Finished difference Result 2412 states and 7565 transitions. [2021-03-11 00:06:20,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-11 00:06:20,846 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:06:20,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:06:20,850 INFO L225 Difference]: With dead ends: 2412 [2021-03-11 00:06:20,851 INFO L226 Difference]: Without dead ends: 2412 [2021-03-11 00:06:20,851 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 400.8ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-03-11 00:06:20,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-03-11 00:06:20,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 960. [2021-03-11 00:06:20,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 3.367049009384776) internal successors, (3229), 959 states have internal predecessors, (3229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:20,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3229 transitions. [2021-03-11 00:06:20,885 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3229 transitions. Word has length 24 [2021-03-11 00:06:20,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:06:20,886 INFO L480 AbstractCegarLoop]: Abstraction has 960 states and 3229 transitions. [2021-03-11 00:06:20,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:20,886 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3229 transitions. [2021-03-11 00:06:20,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:06:20,889 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:06:20,889 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:06:21,115 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-03-11 00:06:21,115 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:06:21,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:06:21,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1454631148, now seen corresponding path program 25 times [2021-03-11 00:06:21,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:06:21,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122935585] [2021-03-11 00:06:21,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:06:21,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:06:21,170 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:21,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122935585] [2021-03-11 00:06:21,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114617389] [2021-03-11 00:06:21,171 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:06:21,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:06:21,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:06:21,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:06:21,300 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:21,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:06:21,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:06:21,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106089203] [2021-03-11 00:06:21,300 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:06:21,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:06:21,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:06:21,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:06:21,301 INFO L87 Difference]: Start difference. First operand 960 states and 3229 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:21,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:06:21,805 INFO L93 Difference]: Finished difference Result 2335 states and 7372 transitions. [2021-03-11 00:06:21,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-11 00:06:21,806 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:06:21,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:06:21,811 INFO L225 Difference]: With dead ends: 2335 [2021-03-11 00:06:21,811 INFO L226 Difference]: Without dead ends: 2335 [2021-03-11 00:06:21,812 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 344.8ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-03-11 00:06:21,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-03-11 00:06:21,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 957. [2021-03-11 00:06:21,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:21,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-03-11 00:06:21,843 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-03-11 00:06:21,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:06:21,843 INFO L480 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-03-11 00:06:21,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:21,843 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-03-11 00:06:21,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:06:21,846 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:06:21,846 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:06:22,058 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-03-11 00:06:22,058 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:06:22,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:06:22,059 INFO L82 PathProgramCache]: Analyzing trace with hash 282285290, now seen corresponding path program 26 times [2021-03-11 00:06:22,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:06:22,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779880945] [2021-03-11 00:06:22,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:06:22,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:06:22,109 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:22,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779880945] [2021-03-11 00:06:22,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089442734] [2021-03-11 00:06:22,109 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 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 [2021-03-11 00:06:22,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:06:22,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:06:22,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:06:22,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:06:22,217 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:22,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:06:22,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-11 00:06:22,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419885216] [2021-03-11 00:06:22,218 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:06:22,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:06:22,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:06:22,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:06:22,218 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:22,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:06:22,699 INFO L93 Difference]: Finished difference Result 2285 states and 7121 transitions. [2021-03-11 00:06:22,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-11 00:06:22,701 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:06:22,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:06:22,706 INFO L225 Difference]: With dead ends: 2285 [2021-03-11 00:06:22,706 INFO L226 Difference]: Without dead ends: 2285 [2021-03-11 00:06:22,707 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 291.8ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-03-11 00:06:22,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-03-11 00:06:22,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 963. [2021-03-11 00:06:22,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:22,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-03-11 00:06:22,743 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-03-11 00:06:22,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:06:22,743 INFO L480 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-03-11 00:06:22,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:22,743 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-03-11 00:06:22,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:06:22,746 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:06:22,746 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:06:22,957 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-03-11 00:06:22,957 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:06:22,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:06:22,958 INFO L82 PathProgramCache]: Analyzing trace with hash 363661378, now seen corresponding path program 27 times [2021-03-11 00:06:22,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:06:22,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861263772] [2021-03-11 00:06:22,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:06:22,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:06:23,002 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:23,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861263772] [2021-03-11 00:06:23,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089173061] [2021-03-11 00:06:23,002 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 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 [2021-03-11 00:06:23,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:06:23,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:06:23,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:06:23,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:06:23,105 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:23,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:06:23,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-11 00:06:23,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470039867] [2021-03-11 00:06:23,106 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:06:23,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:06:23,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:06:23,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:06:23,107 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:23,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:06:23,510 INFO L93 Difference]: Finished difference Result 2176 states and 6849 transitions. [2021-03-11 00:06:23,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-11 00:06:23,511 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:06:23,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:06:23,515 INFO L225 Difference]: With dead ends: 2176 [2021-03-11 00:06:23,515 INFO L226 Difference]: Without dead ends: 2172 [2021-03-11 00:06:23,516 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 238.1ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:06:23,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-03-11 00:06:23,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 957. [2021-03-11 00:06:23,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:23,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-03-11 00:06:23,541 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-03-11 00:06:23,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:06:23,541 INFO L480 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-03-11 00:06:23,541 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:23,541 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-03-11 00:06:23,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:06:23,544 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:06:23,544 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:06:23,767 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:06:23,767 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:06:23,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:06:23,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1294318594, now seen corresponding path program 28 times [2021-03-11 00:06:23,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:06:23,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273236758] [2021-03-11 00:06:23,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:06:23,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:06:23,825 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:23,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273236758] [2021-03-11 00:06:23,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800852541] [2021-03-11 00:06:23,826 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 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 [2021-03-11 00:06:23,863 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:06:23,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:06:23,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:06:23,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:06:23,961 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:23,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:06:23,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:06:23,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129906043] [2021-03-11 00:06:23,962 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:06:23,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:06:23,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:06:23,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:06:23,963 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:24,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:06:24,406 INFO L93 Difference]: Finished difference Result 2199 states and 6893 transitions. [2021-03-11 00:06:24,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-11 00:06:24,406 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:06:24,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:06:24,411 INFO L225 Difference]: With dead ends: 2199 [2021-03-11 00:06:24,411 INFO L226 Difference]: Without dead ends: 2199 [2021-03-11 00:06:24,411 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 294.8ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:06:24,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-03-11 00:06:24,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 963. [2021-03-11 00:06:24,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:24,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-03-11 00:06:24,440 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-03-11 00:06:24,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:06:24,440 INFO L480 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-03-11 00:06:24,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:24,440 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-03-11 00:06:24,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:06:24,442 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:06:24,442 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:06:24,647 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:06:24,647 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:06:24,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:06:24,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1357609548, now seen corresponding path program 29 times [2021-03-11 00:06:24,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:06:24,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234742565] [2021-03-11 00:06:24,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:06:24,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:06:24,696 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:24,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234742565] [2021-03-11 00:06:24,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874512906] [2021-03-11 00:06:24,696 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 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 [2021-03-11 00:06:24,721 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:06:24,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:06:24,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:06:24,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:06:24,802 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:24,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:06:24,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:06:24,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341662224] [2021-03-11 00:06:24,803 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:06:24,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:06:24,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:06:24,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:06:24,803 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:25,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:06:25,236 INFO L93 Difference]: Finished difference Result 2156 states and 6791 transitions. [2021-03-11 00:06:25,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-11 00:06:25,237 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:06:25,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:06:25,243 INFO L225 Difference]: With dead ends: 2156 [2021-03-11 00:06:25,243 INFO L226 Difference]: Without dead ends: 2152 [2021-03-11 00:06:25,244 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 264.3ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-03-11 00:06:25,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-03-11 00:06:25,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 957. [2021-03-11 00:06:25,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:25,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-03-11 00:06:25,280 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-03-11 00:06:25,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:06:25,280 INFO L480 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-03-11 00:06:25,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:25,280 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-03-11 00:06:25,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:06:25,283 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:06:25,283 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:06:25,510 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-03-11 00:06:25,511 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:06:25,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:06:25,511 INFO L82 PathProgramCache]: Analyzing trace with hash -354181564, now seen corresponding path program 30 times [2021-03-11 00:06:25,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:06:25,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390361712] [2021-03-11 00:06:25,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:06:25,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:06:25,553 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:25,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390361712] [2021-03-11 00:06:25,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939965419] [2021-03-11 00:06:25,554 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 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 [2021-03-11 00:06:25,600 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:06:25,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:06:25,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:06:25,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:06:25,671 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:25,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:06:25,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-11 00:06:25,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180830882] [2021-03-11 00:06:25,671 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:06:25,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:06:25,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:06:25,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:06:25,672 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:26,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:06:26,010 INFO L93 Difference]: Finished difference Result 2097 states and 6377 transitions. [2021-03-11 00:06:26,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-11 00:06:26,011 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:06:26,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:06:26,014 INFO L225 Difference]: With dead ends: 2097 [2021-03-11 00:06:26,014 INFO L226 Difference]: Without dead ends: 2097 [2021-03-11 00:06:26,015 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 213.8ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:06:26,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-03-11 00:06:26,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1047. [2021-03-11 00:06:26,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.378585086042065) internal successors, (3534), 1046 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:26,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3534 transitions. [2021-03-11 00:06:26,063 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3534 transitions. Word has length 24 [2021-03-11 00:06:26,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:06:26,064 INFO L480 AbstractCegarLoop]: Abstraction has 1047 states and 3534 transitions. [2021-03-11 00:06:26,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:26,064 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3534 transitions. [2021-03-11 00:06:26,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:06:26,066 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:06:26,066 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:06:26,267 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:06:26,267 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:06:26,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:06:26,268 INFO L82 PathProgramCache]: Analyzing trace with hash -272805476, now seen corresponding path program 31 times [2021-03-11 00:06:26,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:06:26,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015391294] [2021-03-11 00:06:26,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:06:26,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:06:26,309 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:26,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015391294] [2021-03-11 00:06:26,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598699198] [2021-03-11 00:06:26,310 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:06:26,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:06:26,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:06:26,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:06:26,436 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:26,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:06:26,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-11 00:06:26,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202539110] [2021-03-11 00:06:26,439 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:06:26,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:06:26,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:06:26,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:06:26,440 INFO L87 Difference]: Start difference. First operand 1047 states and 3534 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:26,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:06:26,824 INFO L93 Difference]: Finished difference Result 1963 states and 6051 transitions. [2021-03-11 00:06:26,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-11 00:06:26,825 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:06:26,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:06:26,830 INFO L225 Difference]: With dead ends: 1963 [2021-03-11 00:06:26,830 INFO L226 Difference]: Without dead ends: 1959 [2021-03-11 00:06:26,831 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 216.8ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-03-11 00:06:26,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-03-11 00:06:26,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1047. [2021-03-11 00:06:26,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.376673040152964) internal successors, (3532), 1046 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:26,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3532 transitions. [2021-03-11 00:06:26,865 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3532 transitions. Word has length 24 [2021-03-11 00:06:26,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:06:26,865 INFO L480 AbstractCegarLoop]: Abstraction has 1047 states and 3532 transitions. [2021-03-11 00:06:26,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:26,865 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3532 transitions. [2021-03-11 00:06:26,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:06:26,868 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:06:26,868 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:06:27,090 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-03-11 00:06:27,090 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:06:27,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:06:27,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1787897448, now seen corresponding path program 32 times [2021-03-11 00:06:27,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:06:27,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331011221] [2021-03-11 00:06:27,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:06:27,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:06:27,130 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:27,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331011221] [2021-03-11 00:06:27,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716379699] [2021-03-11 00:06:27,131 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 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 [2021-03-11 00:06:27,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:06:27,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:06:27,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:06:27,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:06:27,213 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:27,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:06:27,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-03-11 00:06:27,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834011294] [2021-03-11 00:06:27,214 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:06:27,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:06:27,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:06:27,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:06:27,215 INFO L87 Difference]: Start difference. First operand 1047 states and 3532 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:27,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:06:27,460 INFO L93 Difference]: Finished difference Result 1728 states and 5494 transitions. [2021-03-11 00:06:27,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-11 00:06:27,460 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:06:27,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:06:27,464 INFO L225 Difference]: With dead ends: 1728 [2021-03-11 00:06:27,464 INFO L226 Difference]: Without dead ends: 1716 [2021-03-11 00:06:27,464 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 132.5ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-03-11 00:06:27,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-03-11 00:06:27,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1047. [2021-03-11 00:06:27,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.372848948374761) internal successors, (3528), 1046 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:27,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3528 transitions. [2021-03-11 00:06:27,488 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3528 transitions. Word has length 24 [2021-03-11 00:06:27,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:06:27,488 INFO L480 AbstractCegarLoop]: Abstraction has 1047 states and 3528 transitions. [2021-03-11 00:06:27,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:27,488 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3528 transitions. [2021-03-11 00:06:27,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:06:27,491 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:06:27,491 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:06:27,719 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:06:27,719 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:06:27,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:06:27,719 INFO L82 PathProgramCache]: Analyzing trace with hash -190770732, now seen corresponding path program 33 times [2021-03-11 00:06:27,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:06:27,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790900633] [2021-03-11 00:06:27,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:06:27,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:06:27,761 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:27,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790900633] [2021-03-11 00:06:27,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305746283] [2021-03-11 00:06:27,762 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 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 [2021-03-11 00:06:27,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:06:27,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:06:27,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:06:27,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:06:27,867 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:27,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:06:27,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:06:27,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078949975] [2021-03-11 00:06:27,868 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:06:27,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:06:27,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:06:27,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:06:27,868 INFO L87 Difference]: Start difference. First operand 1047 states and 3528 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:28,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:06:28,283 INFO L93 Difference]: Finished difference Result 1821 states and 5719 transitions. [2021-03-11 00:06:28,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-11 00:06:28,284 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:06:28,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:06:28,289 INFO L225 Difference]: With dead ends: 1821 [2021-03-11 00:06:28,289 INFO L226 Difference]: Without dead ends: 1821 [2021-03-11 00:06:28,290 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 260.2ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-03-11 00:06:28,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-03-11 00:06:28,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1119. [2021-03-11 00:06:28,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.370304114490161) internal successors, (3768), 1118 states have internal predecessors, (3768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:28,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3768 transitions. [2021-03-11 00:06:28,331 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3768 transitions. Word has length 24 [2021-03-11 00:06:28,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:06:28,332 INFO L480 AbstractCegarLoop]: Abstraction has 1119 states and 3768 transitions. [2021-03-11 00:06:28,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:28,332 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3768 transitions. [2021-03-11 00:06:28,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:06:28,335 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:06:28,335 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:06:28,563 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-03-11 00:06:28,563 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:06:28,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:06:28,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1452268422, now seen corresponding path program 34 times [2021-03-11 00:06:28,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:06:28,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791309157] [2021-03-11 00:06:28,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:06:28,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:06:28,611 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:28,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791309157] [2021-03-11 00:06:28,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063414057] [2021-03-11 00:06:28,612 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 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 [2021-03-11 00:06:28,644 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:06:28,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:06:28,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:06:28,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:06:28,749 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:28,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:06:28,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-11 00:06:28,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532810975] [2021-03-11 00:06:28,750 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:06:28,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:06:28,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:06:28,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:06:28,751 INFO L87 Difference]: Start difference. First operand 1119 states and 3768 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:29,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:06:29,160 INFO L93 Difference]: Finished difference Result 1790 states and 5648 transitions. [2021-03-11 00:06:29,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-11 00:06:29,161 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:06:29,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:06:29,165 INFO L225 Difference]: With dead ends: 1790 [2021-03-11 00:06:29,165 INFO L226 Difference]: Without dead ends: 1786 [2021-03-11 00:06:29,165 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 261.3ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-03-11 00:06:29,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-03-11 00:06:29,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1119. [2021-03-11 00:06:29,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.368515205724508) internal successors, (3766), 1118 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:29,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3766 transitions. [2021-03-11 00:06:29,189 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3766 transitions. Word has length 24 [2021-03-11 00:06:29,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:06:29,190 INFO L480 AbstractCegarLoop]: Abstraction has 1119 states and 3766 transitions. [2021-03-11 00:06:29,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:29,190 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3766 transitions. [2021-03-11 00:06:29,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-11 00:06:29,192 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:06:29,192 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:06:29,416 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-03-11 00:06:29,417 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:06:29,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:06:29,417 INFO L82 PathProgramCache]: Analyzing trace with hash 184811244, now seen corresponding path program 35 times [2021-03-11 00:06:29,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:06:29,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015011748] [2021-03-11 00:06:29,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:06:29,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:06:29,456 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:29,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015011748] [2021-03-11 00:06:29,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005331386] [2021-03-11 00:06:29,457 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 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 [2021-03-11 00:06:29,489 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:06:29,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:06:29,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-11 00:06:29,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:06:29,565 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:29,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:06:29,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-11 00:06:29,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475099185] [2021-03-11 00:06:29,566 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:06:29,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:06:29,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:06:29,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:06:29,567 INFO L87 Difference]: Start difference. First operand 1119 states and 3766 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:29,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:06:29,759 INFO L93 Difference]: Finished difference Result 1649 states and 5332 transitions. [2021-03-11 00:06:29,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-11 00:06:29,760 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-11 00:06:29,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:06:29,764 INFO L225 Difference]: With dead ends: 1649 [2021-03-11 00:06:29,764 INFO L226 Difference]: Without dead ends: 1637 [2021-03-11 00:06:29,764 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 110.5ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:06:29,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-03-11 00:06:29,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1119. [2021-03-11 00:06:29,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.3649373881932023) internal successors, (3762), 1118 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:29,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3762 transitions. [2021-03-11 00:06:29,786 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3762 transitions. Word has length 24 [2021-03-11 00:06:29,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:06:29,786 INFO L480 AbstractCegarLoop]: Abstraction has 1119 states and 3762 transitions. [2021-03-11 00:06:29,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:29,786 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3762 transitions. [2021-03-11 00:06:29,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:06:29,789 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:06:29,789 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:06:29,989 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-03-11 00:06:29,990 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:06:29,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:06:29,990 INFO L82 PathProgramCache]: Analyzing trace with hash -998684486, now seen corresponding path program 4 times [2021-03-11 00:06:29,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:06:29,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355555804] [2021-03-11 00:06:29,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:06:30,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:06:30,434 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2021-03-11 00:06:30,630 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-03-11 00:06:30,808 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-03-11 00:06:30,932 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:30,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355555804] [2021-03-11 00:06:30,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509205584] [2021-03-11 00:06:30,933 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:06:30,972 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:06:30,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:06:30,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:06:30,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:06:32,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:32,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:32,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:32,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:32,009 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 33 treesize of output 19 [2021-03-11 00:06:32,010 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:32,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:32,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:32,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:32,024 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 28 treesize of output 16 [2021-03-11 00:06:32,026 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:32,256 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 51 [2021-03-11 00:06:32,257 INFO L628 ElimStorePlain]: treesize reduction 114, result has 53.8 percent of original size [2021-03-11 00:06:32,257 INFO L518 ElimStorePlain]: Eliminatee A vanished before elimination [2021-03-11 00:06:32,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:32,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:32,267 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 21 treesize of output 13 [2021-03-11 00:06:32,270 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:32,342 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:06:32,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:32,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-11 00:06:32,353 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:32,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:32,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:32,361 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 28 treesize of output 16 [2021-03-11 00:06:32,364 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:32,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:06:32,433 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:06:32,434 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 12 variables, input treesize:285, output treesize:51 [2021-03-11 00:06:32,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:32,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:06:32,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-11 00:06:32,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392177917] [2021-03-11 00:06:32,514 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:06:32,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:06:32,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:06:32,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:06:32,515 INFO L87 Difference]: Start difference. First operand 1119 states and 3762 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:32,981 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 41 [2021-03-11 00:06:33,658 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 64 [2021-03-11 00:06:33,974 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2021-03-11 00:06:34,117 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 42 [2021-03-11 00:06:34,425 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 74 [2021-03-11 00:06:34,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:06:34,665 INFO L93 Difference]: Finished difference Result 1517 states and 4955 transitions. [2021-03-11 00:06:34,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-11 00:06:34,665 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:06:34,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:06:34,669 INFO L225 Difference]: With dead ends: 1517 [2021-03-11 00:06:34,669 INFO L226 Difference]: Without dead ends: 1502 [2021-03-11 00:06:34,670 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 2940.0ms TimeCoverageRelationStatistics Valid=174, Invalid=638, Unknown=0, NotChecked=0, Total=812 [2021-03-11 00:06:34,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-03-11 00:06:34,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1141. [2021-03-11 00:06:34,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 1140 states have (on average 3.362280701754386) internal successors, (3833), 1140 states have internal predecessors, (3833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:34,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3833 transitions. [2021-03-11 00:06:34,706 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3833 transitions. Word has length 26 [2021-03-11 00:06:34,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:06:34,706 INFO L480 AbstractCegarLoop]: Abstraction has 1141 states and 3833 transitions. [2021-03-11 00:06:34,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:34,706 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3833 transitions. [2021-03-11 00:06:34,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:06:34,709 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:06:34,709 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:06:34,911 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-03-11 00:06:34,911 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:06:34,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:06:34,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1267884794, now seen corresponding path program 5 times [2021-03-11 00:06:34,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:06:34,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719617473] [2021-03-11 00:06:34,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:06:34,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:06:35,445 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2021-03-11 00:06:35,679 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-03-11 00:06:35,861 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-03-11 00:06:36,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:36,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719617473] [2021-03-11 00:06:36,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122505000] [2021-03-11 00:06:36,002 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 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 [2021-03-11 00:06:36,025 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:06:36,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:06:36,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:06:36,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:06:36,673 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-03-11 00:06:36,755 INFO L446 ElimStorePlain]: Different costs {1=[A], 2=[v_prenex_14, v_prenex_16]} [2021-03-11 00:06:36,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:36,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-11 00:06:36,765 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:36,921 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-03-11 00:06:36,922 INFO L628 ElimStorePlain]: treesize reduction 54, result has 69.8 percent of original size [2021-03-11 00:06:36,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:36,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:36,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:36,956 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 21 treesize of output 13 [2021-03-11 00:06:36,958 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:36,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:36,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:36,967 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 28 treesize of output 16 [2021-03-11 00:06:36,973 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:37,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:06:37,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:37,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:37,022 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 28 treesize of output 16 [2021-03-11 00:06:37,024 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:37,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:06:37,067 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:06:37,067 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:193, output treesize:51 [2021-03-11 00:06:37,153 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:37,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:06:37,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-11 00:06:37,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890089592] [2021-03-11 00:06:37,154 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:06:37,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:06:37,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:06:37,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:06:37,155 INFO L87 Difference]: Start difference. First operand 1141 states and 3833 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:38,013 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 42 [2021-03-11 00:06:38,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:06:38,385 INFO L93 Difference]: Finished difference Result 1495 states and 4899 transitions. [2021-03-11 00:06:38,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-11 00:06:38,386 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:06:38,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:06:38,389 INFO L225 Difference]: With dead ends: 1495 [2021-03-11 00:06:38,389 INFO L226 Difference]: Without dead ends: 1480 [2021-03-11 00:06:38,390 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 2189.1ms TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2021-03-11 00:06:38,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2021-03-11 00:06:38,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 1150. [2021-03-11 00:06:38,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1149 states have (on average 3.3568320278503045) internal successors, (3857), 1149 states have internal predecessors, (3857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:38,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 3857 transitions. [2021-03-11 00:06:38,411 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 3857 transitions. Word has length 26 [2021-03-11 00:06:38,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:06:38,411 INFO L480 AbstractCegarLoop]: Abstraction has 1150 states and 3857 transitions. [2021-03-11 00:06:38,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:38,411 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 3857 transitions. [2021-03-11 00:06:38,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:06:38,414 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:06:38,414 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:06:38,614 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:06:38,615 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:06:38,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:06:38,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1435653194, now seen corresponding path program 36 times [2021-03-11 00:06:38,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:06:38,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363042526] [2021-03-11 00:06:38,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:06:38,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:06:38,993 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 35 [2021-03-11 00:06:39,148 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 38 [2021-03-11 00:06:39,323 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2021-03-11 00:06:39,488 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-03-11 00:06:39,678 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:39,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363042526] [2021-03-11 00:06:39,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550242751] [2021-03-11 00:06:39,679 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 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 [2021-03-11 00:06:39,720 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:06:39,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:06:39,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:06:39,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:06:40,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:40,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:40,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:40,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:40,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:40,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:40,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-03-11 00:06:40,696 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:40,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:40,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:40,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:40,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:40,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:40,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:40,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:06:40,712 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:40,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:40,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:40,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:40,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:40,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:40,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:40,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-03-11 00:06:40,729 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:40,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:40,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:40,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:40,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:40,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:40,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:40,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-03-11 00:06:40,746 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:40,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:40,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:40,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:40,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:40,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:40,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:40,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-03-11 00:06:40,764 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:40,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:40,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:40,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:40,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:40,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:40,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:40,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:06:40,781 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:40,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:40,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:40,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:40,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:40,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:40,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:40,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-03-11 00:06:40,800 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:40,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:40,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:40,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:40,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:40,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:40,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:40,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:06:40,816 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:40,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:40,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:40,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:40,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:40,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:40,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:40,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-03-11 00:06:40,834 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:40,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:40,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:40,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:40,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:40,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:40,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:40,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:06:40,852 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:40,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:40,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:40,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:40,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:40,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:40,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:40,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-03-11 00:06:40,869 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:40,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:40,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:40,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:40,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:40,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:40,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:40,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-03-11 00:06:40,888 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:40,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:40,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:40,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:40,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:40,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:40,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:40,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-03-11 00:06:40,909 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:40,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:40,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:40,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:40,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:40,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:40,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:40,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-03-11 00:06:40,926 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:40,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:40,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:40,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:40,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:40,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-03-11 00:06:40,937 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:40,974 INFO L628 ElimStorePlain]: treesize reduction 34, result has 44.3 percent of original size [2021-03-11 00:06:40,977 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-11 00:06:40,977 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-03-11 00:06:41,028 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:41,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:06:41,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-03-11 00:06:41,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783902590] [2021-03-11 00:06:41,029 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:06:41,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:06:41,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:06:41,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:06:41,030 INFO L87 Difference]: Start difference. First operand 1150 states and 3857 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:41,779 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 44 [2021-03-11 00:06:42,624 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 38 [2021-03-11 00:06:42,792 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 42 [2021-03-11 00:06:42,958 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 47 [2021-03-11 00:06:43,216 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 42 [2021-03-11 00:06:43,671 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2021-03-11 00:06:44,261 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 55 [2021-03-11 00:06:44,437 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-03-11 00:06:44,588 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 55 [2021-03-11 00:06:44,804 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-03-11 00:06:44,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:06:44,823 INFO L93 Difference]: Finished difference Result 1660 states and 5351 transitions. [2021-03-11 00:06:44,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-11 00:06:44,823 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:06:44,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:06:44,827 INFO L225 Difference]: With dead ends: 1660 [2021-03-11 00:06:44,827 INFO L226 Difference]: Without dead ends: 1645 [2021-03-11 00:06:44,828 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 4189.2ms TimeCoverageRelationStatistics Valid=391, Invalid=1961, Unknown=0, NotChecked=0, Total=2352 [2021-03-11 00:06:44,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1645 states. [2021-03-11 00:06:44,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1645 to 1180. [2021-03-11 00:06:44,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 3.340966921119593) internal successors, (3939), 1179 states have internal predecessors, (3939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:44,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3939 transitions. [2021-03-11 00:06:44,850 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3939 transitions. Word has length 26 [2021-03-11 00:06:44,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:06:44,850 INFO L480 AbstractCegarLoop]: Abstraction has 1180 states and 3939 transitions. [2021-03-11 00:06:44,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:44,850 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3939 transitions. [2021-03-11 00:06:44,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:06:44,852 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:06:44,853 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:06:45,053 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-03-11 00:06:45,053 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:06:45,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:06:45,054 INFO L82 PathProgramCache]: Analyzing trace with hash -630606018, now seen corresponding path program 6 times [2021-03-11 00:06:45,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:06:45,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311413154] [2021-03-11 00:06:45,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:06:45,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:06:45,461 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 39 [2021-03-11 00:06:45,715 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2021-03-11 00:06:45,964 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2021-03-11 00:06:46,164 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 30 [2021-03-11 00:06:46,343 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 27 [2021-03-11 00:06:46,397 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:46,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311413154] [2021-03-11 00:06:46,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607393812] [2021-03-11 00:06:46,398 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 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 [2021-03-11 00:06:46,440 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:06:46,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:06:46,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:06:46,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:06:46,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:46,889 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:06:46,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-03-11 00:06:46,897 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:46,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:46,913 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:06:46,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-03-11 00:06:46,915 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:46,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:46,930 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:06:46,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-03-11 00:06:46,932 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:46,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:46,952 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:06:46,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-03-11 00:06:46,956 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:46,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:46,976 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:06:46,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-03-11 00:06:46,979 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:46,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:47,000 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:06:47,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-03-11 00:06:47,012 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:47,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:47,028 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:06:47,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-03-11 00:06:47,030 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:47,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:47,050 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:06:47,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-03-11 00:06:47,054 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:47,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:47,069 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:06:47,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:06:47,073 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:47,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:47,099 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:06:47,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:06:47,101 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:47,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:47,121 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:06:47,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-03-11 00:06:47,129 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:47,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:47,145 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:06:47,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:06:47,147 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:47,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:47,169 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:06:47,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-03-11 00:06:47,170 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:47,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:47,189 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:06:47,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-03-11 00:06:47,193 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:47,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:47,213 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:06:47,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-03-11 00:06:47,217 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:47,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:47,227 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:06:47,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:06:47,229 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:47,328 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:06:47,330 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:06:47,331 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-03-11 00:06:47,617 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:47,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:06:47,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-03-11 00:06:47,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686899141] [2021-03-11 00:06:47,618 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:06:47,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:06:47,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:06:47,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:06:47,619 INFO L87 Difference]: Start difference. First operand 1180 states and 3939 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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) [2021-03-11 00:06:48,363 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 59 [2021-03-11 00:06:48,583 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2021-03-11 00:06:48,757 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 56 [2021-03-11 00:06:48,942 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 54 [2021-03-11 00:06:49,098 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 47 [2021-03-11 00:06:49,432 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-03-11 00:06:49,632 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2021-03-11 00:06:49,881 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 63 [2021-03-11 00:06:50,064 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 44 [2021-03-11 00:06:50,290 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 68 [2021-03-11 00:06:50,468 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 68 [2021-03-11 00:06:51,145 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 56 [2021-03-11 00:06:51,477 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 33 [2021-03-11 00:06:51,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:06:51,630 INFO L93 Difference]: Finished difference Result 1843 states and 5867 transitions. [2021-03-11 00:06:51,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-11 00:06:51,630 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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) Word has length 26 [2021-03-11 00:06:51,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:06:51,634 INFO L225 Difference]: With dead ends: 1843 [2021-03-11 00:06:51,635 INFO L226 Difference]: Without dead ends: 1828 [2021-03-11 00:06:51,635 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 4703.5ms TimeCoverageRelationStatistics Valid=290, Invalid=1602, Unknown=0, NotChecked=0, Total=1892 [2021-03-11 00:06:51,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2021-03-11 00:06:51,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 1198. [2021-03-11 00:06:51,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 3.346700083542189) internal successors, (4006), 1197 states have internal predecessors, (4006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:51,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 4006 transitions. [2021-03-11 00:06:51,675 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 4006 transitions. Word has length 26 [2021-03-11 00:06:51,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:06:51,675 INFO L480 AbstractCegarLoop]: Abstraction has 1198 states and 4006 transitions. [2021-03-11 00:06:51,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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) [2021-03-11 00:06:51,675 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 4006 transitions. [2021-03-11 00:06:51,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:06:51,677 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:06:51,677 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:06:51,878 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:06:51,878 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:06:51,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:06:51,879 INFO L82 PathProgramCache]: Analyzing trace with hash 919775546, now seen corresponding path program 37 times [2021-03-11 00:06:51,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:06:51,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542270384] [2021-03-11 00:06:51,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:06:51,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:06:52,177 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 35 [2021-03-11 00:06:52,311 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 38 [2021-03-11 00:06:52,483 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2021-03-11 00:06:52,766 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:52,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542270384] [2021-03-11 00:06:52,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403373715] [2021-03-11 00:06:52,767 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 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 [2021-03-11 00:06:52,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:06:52,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-11 00:06:52,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:06:53,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:53,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:53,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 16 [2021-03-11 00:06:53,649 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:53,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:53,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:53,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-03-11 00:06:53,666 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:53,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:53,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:53,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 19 [2021-03-11 00:06:53,681 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:53,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:53,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:53,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 16 [2021-03-11 00:06:53,697 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:53,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:53,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:53,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 16 [2021-03-11 00:06:53,712 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:53,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:53,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:53,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 7 [2021-03-11 00:06:53,729 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:53,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:53,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:53,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-03-11 00:06:53,744 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:53,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:53,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:53,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 13 [2021-03-11 00:06:53,761 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:53,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:53,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:53,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 19 [2021-03-11 00:06:53,778 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:53,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:53,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:53,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 13 [2021-03-11 00:06:53,792 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:53,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:53,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:53,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 16 [2021-03-11 00:06:53,806 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:53,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:53,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:53,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2021-03-11 00:06:53,825 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:53,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:53,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:53,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-03-11 00:06:53,841 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:53,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:53,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:53,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 13 [2021-03-11 00:06:53,861 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:53,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:53,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:53,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 13 [2021-03-11 00:06:53,875 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:53,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:53,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:06:53,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:06:53,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-03-11 00:06:53,885 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:06:53,933 INFO L628 ElimStorePlain]: treesize reduction 34, result has 49.3 percent of original size [2021-03-11 00:06:53,935 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-11 00:06:53,936 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:809, output treesize:21 [2021-03-11 00:06:53,984 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:53,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:06:53,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-03-11 00:06:53,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335172036] [2021-03-11 00:06:53,985 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:06:53,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:06:53,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:06:53,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:06:53,986 INFO L87 Difference]: Start difference. First operand 1198 states and 4006 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:54,755 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 43 [2021-03-11 00:06:55,542 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 53 [2021-03-11 00:06:55,780 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 47 [2021-03-11 00:06:56,028 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 42 [2021-03-11 00:06:56,435 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2021-03-11 00:06:57,079 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-03-11 00:06:57,628 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 55 [2021-03-11 00:06:57,819 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-03-11 00:06:57,979 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 55 [2021-03-11 00:06:58,174 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-03-11 00:06:58,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:06:58,190 INFO L93 Difference]: Finished difference Result 1879 states and 5994 transitions. [2021-03-11 00:06:58,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-11 00:06:58,191 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:06:58,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:06:58,194 INFO L225 Difference]: With dead ends: 1879 [2021-03-11 00:06:58,194 INFO L226 Difference]: Without dead ends: 1864 [2021-03-11 00:06:58,195 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 4360.2ms TimeCoverageRelationStatistics Valid=468, Invalid=2082, Unknown=0, NotChecked=0, Total=2550 [2021-03-11 00:06:58,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1864 states. [2021-03-11 00:06:58,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1864 to 1206. [2021-03-11 00:06:58,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1206 states, 1205 states have (on average 3.349377593360996) internal successors, (4036), 1205 states have internal predecessors, (4036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:58,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1206 states to 1206 states and 4036 transitions. [2021-03-11 00:06:58,217 INFO L78 Accepts]: Start accepts. Automaton has 1206 states and 4036 transitions. Word has length 26 [2021-03-11 00:06:58,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:06:58,217 INFO L480 AbstractCegarLoop]: Abstraction has 1206 states and 4036 transitions. [2021-03-11 00:06:58,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:06:58,217 INFO L276 IsEmpty]: Start isEmpty. Operand 1206 states and 4036 transitions. [2021-03-11 00:06:58,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:06:58,220 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:06:58,220 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:06:58,420 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-03-11 00:06:58,420 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:06:58,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:06:58,421 INFO L82 PathProgramCache]: Analyzing trace with hash -56543298, now seen corresponding path program 38 times [2021-03-11 00:06:58,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:06:58,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716411021] [2021-03-11 00:06:58,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:06:58,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:06:59,108 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:06:59,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716411021] [2021-03-11 00:06:59,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063600760] [2021-03-11 00:06:59,108 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 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 [2021-03-11 00:06:59,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:06:59,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:06:59,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-11 00:06:59,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:07:00,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:00,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:00,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:00,107 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-03-11 00:07:00,107 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 33 [2021-03-11 00:07:00,110 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:00,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:00,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:00,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:00,164 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-03-11 00:07:00,164 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 33 [2021-03-11 00:07:00,170 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:00,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:00,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:00,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:00,229 INFO L354 Elim1Store]: treesize reduction 11, result has 62.1 percent of original size [2021-03-11 00:07:00,229 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 36 [2021-03-11 00:07:00,236 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:00,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:00,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:00,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:00,282 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:07:00,282 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2021-03-11 00:07:00,295 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:00,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:00,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:00,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:00,342 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-03-11 00:07:00,343 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 28 [2021-03-11 00:07:00,345 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:00,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:00,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:00,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:00,391 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-03-11 00:07:00,392 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 28 [2021-03-11 00:07:00,394 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:00,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:00,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:00,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:00,425 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:07:00,426 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-03-11 00:07:00,427 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:00,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:00,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:00,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:00,459 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:07:00,460 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 1 [2021-03-11 00:07:00,461 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:00,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:00,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:00,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:00,514 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-03-11 00:07:00,514 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 26 [2021-03-11 00:07:00,521 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:00,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:00,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:00,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:00,571 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-03-11 00:07:00,572 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 30 [2021-03-11 00:07:00,579 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:00,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:00,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:00,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:00,614 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:07:00,615 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-03-11 00:07:00,616 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:00,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:00,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:00,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:00,704 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-03-11 00:07:00,704 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 30 [2021-03-11 00:07:00,713 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:00,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:00,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:00,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:00,744 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:07:00,745 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-03-11 00:07:00,746 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:00,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:00,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:00,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:00,774 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:07:00,775 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-03-11 00:07:00,776 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:00,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:00,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:00,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:00,806 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:07:00,806 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 1 [2021-03-11 00:07:00,807 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:00,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:00,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:00,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:00,826 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:07:00,827 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-03-11 00:07:00,828 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:01,042 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2021-03-11 00:07:01,043 INFO L628 ElimStorePlain]: treesize reduction 172, result has 48.0 percent of original size [2021-03-11 00:07:01,047 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:07:01,047 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:953, output treesize:180 [2021-03-11 00:07:01,241 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-03-11 00:07:01,309 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:07:01,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:07:01,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-03-11 00:07:01,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164979593] [2021-03-11 00:07:01,309 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-11 00:07:01,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:07:01,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-11 00:07:01,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-03-11 00:07:01,310 INFO L87 Difference]: Start difference. First operand 1206 states and 4036 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:07:02,224 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-03-11 00:07:02,378 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 42 [2021-03-11 00:07:02,690 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2021-03-11 00:07:03,324 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2021-03-11 00:07:03,498 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2021-03-11 00:07:03,952 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 47 [2021-03-11 00:07:04,123 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 45 [2021-03-11 00:07:04,511 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 54 [2021-03-11 00:07:04,663 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-03-11 00:07:05,029 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 55 [2021-03-11 00:07:05,206 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2021-03-11 00:07:05,393 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-03-11 00:07:05,862 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 65 [2021-03-11 00:07:06,277 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2021-03-11 00:07:06,541 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 42 [2021-03-11 00:07:06,850 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2021-03-11 00:07:07,110 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2021-03-11 00:07:07,255 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 42 [2021-03-11 00:07:07,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:07:07,418 INFO L93 Difference]: Finished difference Result 2467 states and 7615 transitions. [2021-03-11 00:07:07,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-11 00:07:07,419 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:07:07,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:07:07,424 INFO L225 Difference]: With dead ends: 2467 [2021-03-11 00:07:07,424 INFO L226 Difference]: Without dead ends: 2422 [2021-03-11 00:07:07,425 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1000 ImplicationChecksByTransitivity, 6249.9ms TimeCoverageRelationStatistics Valid=531, Invalid=3129, Unknown=0, NotChecked=0, Total=3660 [2021-03-11 00:07:07,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2422 states. [2021-03-11 00:07:07,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2422 to 1381. [2021-03-11 00:07:07,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1381 states, 1380 states have (on average 3.318840579710145) internal successors, (4580), 1380 states have internal predecessors, (4580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:07:07,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1381 states to 1381 states and 4580 transitions. [2021-03-11 00:07:07,456 INFO L78 Accepts]: Start accepts. Automaton has 1381 states and 4580 transitions. Word has length 26 [2021-03-11 00:07:07,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:07:07,456 INFO L480 AbstractCegarLoop]: Abstraction has 1381 states and 4580 transitions. [2021-03-11 00:07:07,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:07:07,456 INFO L276 IsEmpty]: Start isEmpty. Operand 1381 states and 4580 transitions. [2021-03-11 00:07:07,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:07:07,459 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:07:07,459 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:07:07,659 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable332 [2021-03-11 00:07:07,660 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:07:07,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:07:07,660 INFO L82 PathProgramCache]: Analyzing trace with hash -2141610526, now seen corresponding path program 7 times [2021-03-11 00:07:07,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:07:07,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5735469] [2021-03-11 00:07:07,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:07:07,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:07:07,953 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2021-03-11 00:07:08,069 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2021-03-11 00:07:08,354 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:07:08,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5735469] [2021-03-11 00:07:08,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998620525] [2021-03-11 00:07:08,354 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 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 [2021-03-11 00:07:08,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:07:08,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:07:08,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:07:09,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:09,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:09,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:09,273 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 21 treesize of output 13 [2021-03-11 00:07:09,274 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:09,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:09,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:09,284 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 13 [2021-03-11 00:07:09,286 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:09,508 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2021-03-11 00:07:09,509 INFO L628 ElimStorePlain]: treesize reduction 93, result has 59.6 percent of original size [2021-03-11 00:07:09,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:09,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:09,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:09,519 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 28 treesize of output 16 [2021-03-11 00:07:09,521 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:09,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:09,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-11 00:07:09,531 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:09,595 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:07:09,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:09,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:09,602 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 28 treesize of output 16 [2021-03-11 00:07:09,604 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:09,656 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:07:09,657 INFO L518 ElimStorePlain]: Eliminatee v_prenex_23 vanished before elimination [2021-03-11 00:07:09,661 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:07:09,661 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 12 variables, input treesize:285, output treesize:51 [2021-03-11 00:07:09,725 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:07:09,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:07:09,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-11 00:07:09,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862945610] [2021-03-11 00:07:09,726 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:07:09,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:07:09,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:07:09,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:07:09,727 INFO L87 Difference]: Start difference. First operand 1381 states and 4580 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:07:10,205 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 28 [2021-03-11 00:07:10,561 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2021-03-11 00:07:10,935 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 65 [2021-03-11 00:07:11,200 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 63 [2021-03-11 00:07:11,613 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 75 [2021-03-11 00:07:11,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:07:11,827 INFO L93 Difference]: Finished difference Result 1801 states and 5845 transitions. [2021-03-11 00:07:11,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-11 00:07:11,828 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:07:11,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:07:11,832 INFO L225 Difference]: With dead ends: 1801 [2021-03-11 00:07:11,832 INFO L226 Difference]: Without dead ends: 1786 [2021-03-11 00:07:11,832 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 2729.2ms TimeCoverageRelationStatistics Valid=188, Invalid=682, Unknown=0, NotChecked=0, Total=870 [2021-03-11 00:07:11,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-03-11 00:07:11,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1398. [2021-03-11 00:07:11,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1398 states, 1397 states have (on average 3.3149606299212597) internal successors, (4631), 1397 states have internal predecessors, (4631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:07:11,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 4631 transitions. [2021-03-11 00:07:11,862 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 4631 transitions. Word has length 26 [2021-03-11 00:07:11,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:07:11,862 INFO L480 AbstractCegarLoop]: Abstraction has 1398 states and 4631 transitions. [2021-03-11 00:07:11,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:07:11,863 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 4631 transitions. [2021-03-11 00:07:11,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:07:11,867 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:07:11,867 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:07:12,079 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable438,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:07:12,080 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:07:12,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:07:12,080 INFO L82 PathProgramCache]: Analyzing trace with hash 124958754, now seen corresponding path program 8 times [2021-03-11 00:07:12,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:07:12,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467280963] [2021-03-11 00:07:12,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:07:12,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:07:12,344 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2021-03-11 00:07:12,463 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-03-11 00:07:12,793 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:07:12,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467280963] [2021-03-11 00:07:12,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437890389] [2021-03-11 00:07:12,794 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 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 [2021-03-11 00:07:12,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:07:12,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:07:12,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-11 00:07:12,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:07:13,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:13,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:13,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:13,199 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-03-11 00:07:13,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 27 [2021-03-11 00:07:13,207 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:13,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:13,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:13,229 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-03-11 00:07:13,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:07:13,231 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:13,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:13,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:13,274 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-03-11 00:07:13,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 30 [2021-03-11 00:07:13,283 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:13,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:13,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:13,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:13,307 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-03-11 00:07:13,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:07:13,309 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:13,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:13,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:13,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:13,333 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-03-11 00:07:13,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:07:13,334 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:13,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:13,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:13,357 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-03-11 00:07:13,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 22 [2021-03-11 00:07:13,359 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:13,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:13,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:13,407 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-03-11 00:07:13,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:07:13,409 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:13,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:13,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:13,429 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-03-11 00:07:13,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:07:13,431 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:13,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:13,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:13,468 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-03-11 00:07:13,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 26 [2021-03-11 00:07:13,471 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:13,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:13,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:13,498 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:07:13,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 37 [2021-03-11 00:07:13,502 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:13,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:13,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:13,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:13,520 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-03-11 00:07:13,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:07:13,522 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:13,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:13,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:13,548 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:07:13,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 37 [2021-03-11 00:07:13,550 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:13,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:13,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:13,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:13,583 INFO L354 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2021-03-11 00:07:13,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 30 [2021-03-11 00:07:13,586 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:13,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:13,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:13,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:13,618 INFO L354 Elim1Store]: treesize reduction 8, result has 57.9 percent of original size [2021-03-11 00:07:13,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 23 [2021-03-11 00:07:13,620 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:13,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:13,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:13,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:13,644 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:07:13,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2021-03-11 00:07:13,652 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:13,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:13,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:13,664 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-03-11 00:07:13,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:07:13,666 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:13,797 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-11 00:07:13,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:07:13,799 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:07:13,800 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:777, output treesize:249 [2021-03-11 00:07:13,961 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-11 00:07:14,215 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 38 [2021-03-11 00:07:14,366 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:07:14,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:07:14,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-11 00:07:14,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377091361] [2021-03-11 00:07:14,366 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:07:14,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:07:14,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:07:14,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:07:14,367 INFO L87 Difference]: Start difference. First operand 1398 states and 4631 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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) [2021-03-11 00:07:15,208 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2021-03-11 00:07:15,362 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 35 [2021-03-11 00:07:15,533 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 41 [2021-03-11 00:07:15,810 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2021-03-11 00:07:16,063 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 55 [2021-03-11 00:07:16,396 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 61 [2021-03-11 00:07:16,573 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-03-11 00:07:16,981 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 68 [2021-03-11 00:07:17,215 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 69 [2021-03-11 00:07:17,504 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2021-03-11 00:07:17,669 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-11 00:07:18,054 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2021-03-11 00:07:18,457 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2021-03-11 00:07:19,053 WARN L205 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2021-03-11 00:07:19,438 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 37 [2021-03-11 00:07:20,090 WARN L205 SmtUtils]: Spent 555.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 71 [2021-03-11 00:07:20,664 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 40 [2021-03-11 00:07:20,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:07:20,795 INFO L93 Difference]: Finished difference Result 2032 states and 6448 transitions. [2021-03-11 00:07:20,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-11 00:07:20,795 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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) Word has length 26 [2021-03-11 00:07:20,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:07:20,799 INFO L225 Difference]: With dead ends: 2032 [2021-03-11 00:07:20,799 INFO L226 Difference]: Without dead ends: 2017 [2021-03-11 00:07:20,800 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 6401.4ms TimeCoverageRelationStatistics Valid=313, Invalid=1757, Unknown=0, NotChecked=0, Total=2070 [2021-03-11 00:07:20,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2017 states. [2021-03-11 00:07:20,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2017 to 1420. [2021-03-11 00:07:20,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1420 states, 1419 states have (on average 3.320648343904158) internal successors, (4712), 1419 states have internal predecessors, (4712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:07:20,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1420 states to 1420 states and 4712 transitions. [2021-03-11 00:07:20,830 INFO L78 Accepts]: Start accepts. Automaton has 1420 states and 4712 transitions. Word has length 26 [2021-03-11 00:07:20,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:07:20,830 INFO L480 AbstractCegarLoop]: Abstraction has 1420 states and 4712 transitions. [2021-03-11 00:07:20,830 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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) [2021-03-11 00:07:20,830 INFO L276 IsEmpty]: Start isEmpty. Operand 1420 states and 4712 transitions. [2021-03-11 00:07:20,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:07:20,833 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:07:20,833 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:07:21,034 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable459 [2021-03-11 00:07:21,034 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:07:21,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:07:21,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1812450954, now seen corresponding path program 9 times [2021-03-11 00:07:21,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:07:21,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975624309] [2021-03-11 00:07:21,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:07:21,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:07:21,270 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2021-03-11 00:07:21,414 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2021-03-11 00:07:21,656 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:07:21,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975624309] [2021-03-11 00:07:21,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108024595] [2021-03-11 00:07:21,657 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 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 [2021-03-11 00:07:21,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:07:21,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:07:21,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:07:21,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:07:22,091 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-03-11 00:07:22,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:22,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:22,655 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 21 treesize of output 13 [2021-03-11 00:07:22,656 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:22,911 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-03-11 00:07:22,912 INFO L628 ElimStorePlain]: treesize reduction 98, result has 60.6 percent of original size [2021-03-11 00:07:22,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:22,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:22,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:22,923 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 28 treesize of output 16 [2021-03-11 00:07:22,925 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:22,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:22,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-11 00:07:22,935 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:23,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:07:23,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:23,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:23,038 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 21 treesize of output 13 [2021-03-11 00:07:23,041 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:23,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:07:23,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:23,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:23,133 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 28 treesize of output 16 [2021-03-11 00:07:23,135 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:23,210 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:07:23,215 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:07:23,216 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 12 variables, input treesize:285, output treesize:51 [2021-03-11 00:07:23,303 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:07:23,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:07:23,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-11 00:07:23,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007177363] [2021-03-11 00:07:23,304 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:07:23,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:07:23,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:07:23,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:07:23,305 INFO L87 Difference]: Start difference. First operand 1420 states and 4712 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:07:23,473 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 28 [2021-03-11 00:07:23,665 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 31 [2021-03-11 00:07:23,878 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 36 [2021-03-11 00:07:24,038 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 28 [2021-03-11 00:07:24,365 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 46 [2021-03-11 00:07:24,568 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-03-11 00:07:24,911 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 55 [2021-03-11 00:07:25,178 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 47 [2021-03-11 00:07:25,691 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 54 [2021-03-11 00:07:26,181 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2021-03-11 00:07:26,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:07:26,293 INFO L93 Difference]: Finished difference Result 1935 states and 6256 transitions. [2021-03-11 00:07:26,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-11 00:07:26,293 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:07:26,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:07:26,298 INFO L225 Difference]: With dead ends: 1935 [2021-03-11 00:07:26,298 INFO L226 Difference]: Without dead ends: 1920 [2021-03-11 00:07:26,298 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 3619.4ms TimeCoverageRelationStatistics Valid=234, Invalid=888, Unknown=0, NotChecked=0, Total=1122 [2021-03-11 00:07:26,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1920 states. [2021-03-11 00:07:26,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1920 to 1429. [2021-03-11 00:07:26,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1429 states, 1428 states have (on average 3.3249299719887957) internal successors, (4748), 1428 states have internal predecessors, (4748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:07:26,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1429 states to 1429 states and 4748 transitions. [2021-03-11 00:07:26,326 INFO L78 Accepts]: Start accepts. Automaton has 1429 states and 4748 transitions. Word has length 26 [2021-03-11 00:07:26,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:07:26,326 INFO L480 AbstractCegarLoop]: Abstraction has 1429 states and 4748 transitions. [2021-03-11 00:07:26,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:07:26,326 INFO L276 IsEmpty]: Start isEmpty. Operand 1429 states and 4748 transitions. [2021-03-11 00:07:26,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:07:26,329 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:07:26,329 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:07:26,530 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable495,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:07:26,530 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:07:26,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:07:26,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1980260046, now seen corresponding path program 10 times [2021-03-11 00:07:26,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:07:26,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91085435] [2021-03-11 00:07:26,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:07:26,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:07:26,847 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2021-03-11 00:07:26,972 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-03-11 00:07:27,218 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:07:27,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91085435] [2021-03-11 00:07:27,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208809628] [2021-03-11 00:07:27,218 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 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 [2021-03-11 00:07:27,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:07:27,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:07:27,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:07:27,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:07:27,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:27,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:27,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:27,741 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 13 [2021-03-11 00:07:27,742 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:27,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:27,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:27,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:27,753 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 33 treesize of output 19 [2021-03-11 00:07:27,754 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:27,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:27,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:27,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:27,767 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 33 treesize of output 19 [2021-03-11 00:07:27,769 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:27,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:27,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:27,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:27,781 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 28 treesize of output 16 [2021-03-11 00:07:27,782 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:27,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:27,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:27,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:27,795 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 13 [2021-03-11 00:07:27,797 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:27,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:27,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:27,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:27,809 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 31 treesize of output 19 [2021-03-11 00:07:27,811 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:27,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:27,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:27,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:27,823 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 21 treesize of output 13 [2021-03-11 00:07:27,824 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:27,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:27,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:27,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:27,840 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 28 treesize of output 16 [2021-03-11 00:07:27,842 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:27,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:27,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:27,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:27,853 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 21 treesize of output 13 [2021-03-11 00:07:27,858 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:27,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:27,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:27,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:27,870 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 28 treesize of output 16 [2021-03-11 00:07:27,871 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:27,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:27,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:27,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:27,882 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 33 treesize of output 19 [2021-03-11 00:07:27,883 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:27,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:27,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:27,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:27,894 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 31 treesize of output 19 [2021-03-11 00:07:27,895 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:27,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:27,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:27,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:27,907 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 33 treesize of output 19 [2021-03-11 00:07:27,908 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:27,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:27,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:27,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:27,918 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 28 treesize of output 16 [2021-03-11 00:07:27,920 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:27,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:27,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:27,927 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 19 [2021-03-11 00:07:27,929 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:28,029 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-03-11 00:07:28,030 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-03-11 00:07:28,032 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:07:28,033 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-03-11 00:07:28,116 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:07:28,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:07:28,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-11 00:07:28,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300545587] [2021-03-11 00:07:28,117 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:07:28,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:07:28,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:07:28,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:07:28,117 INFO L87 Difference]: Start difference. First operand 1429 states and 4748 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:07:28,537 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 35 [2021-03-11 00:07:29,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:07:29,087 INFO L93 Difference]: Finished difference Result 1734 states and 5693 transitions. [2021-03-11 00:07:29,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-11 00:07:29,088 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:07:29,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:07:29,093 INFO L225 Difference]: With dead ends: 1734 [2021-03-11 00:07:29,093 INFO L226 Difference]: Without dead ends: 1719 [2021-03-11 00:07:29,093 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1506.4ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-03-11 00:07:29,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1719 states. [2021-03-11 00:07:29,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1719 to 1438. [2021-03-11 00:07:29,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1438 states, 1437 states have (on average 3.329157967988866) internal successors, (4784), 1437 states have internal predecessors, (4784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:07:29,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1438 states to 1438 states and 4784 transitions. [2021-03-11 00:07:29,129 INFO L78 Accepts]: Start accepts. Automaton has 1438 states and 4784 transitions. Word has length 26 [2021-03-11 00:07:29,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:07:29,129 INFO L480 AbstractCegarLoop]: Abstraction has 1438 states and 4784 transitions. [2021-03-11 00:07:29,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:07:29,129 INFO L276 IsEmpty]: Start isEmpty. Operand 1438 states and 4784 transitions. [2021-03-11 00:07:29,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:07:29,133 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:07:29,133 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:07:29,333 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable516,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:07:29,334 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:07:29,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:07:29,334 INFO L82 PathProgramCache]: Analyzing trace with hash 247191222, now seen corresponding path program 11 times [2021-03-11 00:07:29,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:07:29,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773079192] [2021-03-11 00:07:29,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:07:29,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:07:29,572 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2021-03-11 00:07:29,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:07:29,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773079192] [2021-03-11 00:07:29,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867256033] [2021-03-11 00:07:29,838 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 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 [2021-03-11 00:07:29,864 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:07:29,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:07:29,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:07:29,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:07:30,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:30,408 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:07:30,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-03-11 00:07:30,414 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:30,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:30,441 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:07:30,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-03-11 00:07:30,445 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:30,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:30,463 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:07:30,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:07:30,465 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:30,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:30,483 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:07:30,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:07:30,484 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:30,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:30,503 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:07:30,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:07:30,505 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:30,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:30,529 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:07:30,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-03-11 00:07:30,532 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:30,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:30,557 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:07:30,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-03-11 00:07:30,562 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:30,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:30,585 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:07:30,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-03-11 00:07:30,594 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:30,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:30,615 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:07:30,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-03-11 00:07:30,617 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:30,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:30,641 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:07:30,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-03-11 00:07:30,648 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:30,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:30,667 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:07:30,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:07:30,669 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:30,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:30,694 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:07:30,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-03-11 00:07:30,696 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:30,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:30,714 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:07:30,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-03-11 00:07:30,717 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:30,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:30,735 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:07:30,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-03-11 00:07:30,737 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:30,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:30,754 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:07:30,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-03-11 00:07:30,756 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:30,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:30,766 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:07:30,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-03-11 00:07:30,768 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:30,879 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-11 00:07:30,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:07:30,886 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:07:30,887 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:657, output treesize:174 [2021-03-11 00:07:31,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:07:31,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:07:31,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-11 00:07:31,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361743106] [2021-03-11 00:07:31,184 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:07:31,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:07:31,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:07:31,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:07:31,185 INFO L87 Difference]: Start difference. First operand 1438 states and 4784 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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) [2021-03-11 00:07:31,380 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 28 [2021-03-11 00:07:31,576 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 26 [2021-03-11 00:07:31,987 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 39 [2021-03-11 00:07:32,316 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2021-03-11 00:07:32,645 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2021-03-11 00:07:32,987 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 49 [2021-03-11 00:07:33,309 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2021-03-11 00:07:33,491 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 40 [2021-03-11 00:07:33,826 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 50 [2021-03-11 00:07:34,077 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-03-11 00:07:34,387 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 53 [2021-03-11 00:07:34,807 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 51 [2021-03-11 00:07:35,391 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 51 [2021-03-11 00:07:35,642 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2021-03-11 00:07:35,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:07:35,883 INFO L93 Difference]: Finished difference Result 2377 states and 7644 transitions. [2021-03-11 00:07:35,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-11 00:07:35,884 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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) Word has length 26 [2021-03-11 00:07:35,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:07:35,889 INFO L225 Difference]: With dead ends: 2377 [2021-03-11 00:07:35,889 INFO L226 Difference]: Without dead ends: 2347 [2021-03-11 00:07:35,889 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 4483.9ms TimeCoverageRelationStatistics Valid=381, Invalid=1689, Unknown=0, NotChecked=0, Total=2070 [2021-03-11 00:07:35,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2347 states. [2021-03-11 00:07:35,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2347 to 1438. [2021-03-11 00:07:35,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1438 states, 1437 states have (on average 3.329157967988866) internal successors, (4784), 1437 states have internal predecessors, (4784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:07:35,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1438 states to 1438 states and 4784 transitions. [2021-03-11 00:07:35,922 INFO L78 Accepts]: Start accepts. Automaton has 1438 states and 4784 transitions. Word has length 26 [2021-03-11 00:07:35,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:07:35,923 INFO L480 AbstractCegarLoop]: Abstraction has 1438 states and 4784 transitions. [2021-03-11 00:07:35,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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) [2021-03-11 00:07:35,923 INFO L276 IsEmpty]: Start isEmpty. Operand 1438 states and 4784 transitions. [2021-03-11 00:07:35,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:07:35,926 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:07:35,926 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:07:36,126 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable548,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:07:36,127 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:07:36,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:07:36,127 INFO L82 PathProgramCache]: Analyzing trace with hash 317421942, now seen corresponding path program 12 times [2021-03-11 00:07:36,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:07:36,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206128037] [2021-03-11 00:07:36,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:07:36,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:07:36,385 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2021-03-11 00:07:36,599 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2021-03-11 00:07:36,763 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2021-03-11 00:07:36,961 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:07:36,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206128037] [2021-03-11 00:07:36,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780835507] [2021-03-11 00:07:36,961 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 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 [2021-03-11 00:07:36,985 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:07:36,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:07:36,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:07:36,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:07:37,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:37,364 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:07:37,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-03-11 00:07:37,370 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:37,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:37,391 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:07:37,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-03-11 00:07:37,392 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:37,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:37,405 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:07:37,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-03-11 00:07:37,406 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:37,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:37,423 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:07:37,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-03-11 00:07:37,425 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:37,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:37,442 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:07:37,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-03-11 00:07:37,446 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:37,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:37,465 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:07:37,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-03-11 00:07:37,472 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:37,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:37,486 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:07:37,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-03-11 00:07:37,487 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:37,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:37,505 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:07:37,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-03-11 00:07:37,507 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:37,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:37,521 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:07:37,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:07:37,523 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:37,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:37,537 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:07:37,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:07:37,538 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:37,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:37,556 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:07:37,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-03-11 00:07:37,560 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:37,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:37,575 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:07:37,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:07:37,576 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:37,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:37,591 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:07:37,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-03-11 00:07:37,592 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:37,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:37,610 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:07:37,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-03-11 00:07:37,613 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:37,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:37,629 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:07:37,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-03-11 00:07:37,632 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:37,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:37,650 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:07:37,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:07:37,651 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:37,752 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-11 00:07:37,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:07:37,755 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:07:37,755 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:609, output treesize:165 [2021-03-11 00:07:37,886 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-11 00:07:38,025 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:07:38,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:07:38,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-03-11 00:07:38,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357671105] [2021-03-11 00:07:38,026 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:07:38,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:07:38,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:07:38,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:07:38,026 INFO L87 Difference]: Start difference. First operand 1438 states and 4784 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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) [2021-03-11 00:07:38,929 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2021-03-11 00:07:39,098 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2021-03-11 00:07:39,473 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 57 [2021-03-11 00:07:39,668 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2021-03-11 00:07:39,829 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 40 [2021-03-11 00:07:40,074 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 58 [2021-03-11 00:07:40,474 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2021-03-11 00:07:40,730 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 68 [2021-03-11 00:07:40,992 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 45 [2021-03-11 00:07:41,121 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-11 00:07:41,396 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2021-03-11 00:07:41,745 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 39 [2021-03-11 00:07:42,134 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 32 [2021-03-11 00:07:42,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:07:42,292 INFO L93 Difference]: Finished difference Result 2013 states and 6563 transitions. [2021-03-11 00:07:42,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-11 00:07:42,293 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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) Word has length 26 [2021-03-11 00:07:42,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:07:42,298 INFO L225 Difference]: With dead ends: 2013 [2021-03-11 00:07:42,298 INFO L226 Difference]: Without dead ends: 1998 [2021-03-11 00:07:42,298 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 4643.3ms TimeCoverageRelationStatistics Valid=307, Invalid=1415, Unknown=0, NotChecked=0, Total=1722 [2021-03-11 00:07:42,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1998 states. [2021-03-11 00:07:42,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1998 to 1438. [2021-03-11 00:07:42,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1438 states, 1437 states have (on average 3.329157967988866) internal successors, (4784), 1437 states have internal predecessors, (4784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:07:42,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1438 states to 1438 states and 4784 transitions. [2021-03-11 00:07:42,329 INFO L78 Accepts]: Start accepts. Automaton has 1438 states and 4784 transitions. Word has length 26 [2021-03-11 00:07:42,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:07:42,329 INFO L480 AbstractCegarLoop]: Abstraction has 1438 states and 4784 transitions. [2021-03-11 00:07:42,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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) [2021-03-11 00:07:42,329 INFO L276 IsEmpty]: Start isEmpty. Operand 1438 states and 4784 transitions. [2021-03-11 00:07:42,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:07:42,332 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:07:42,332 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:07:42,533 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable589,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:07:42,533 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:07:42,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:07:42,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1219202938, now seen corresponding path program 39 times [2021-03-11 00:07:42,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:07:42,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789048838] [2021-03-11 00:07:42,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:07:42,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:07:43,012 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2021-03-11 00:07:43,313 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:07:43,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789048838] [2021-03-11 00:07:43,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469023298] [2021-03-11 00:07:43,314 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 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 [2021-03-11 00:07:43,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:07:43,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:07:43,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:07:43,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:07:44,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:44,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:44,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:44,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:44,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:44,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:44,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-03-11 00:07:44,251 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:44,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:44,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:44,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:44,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:44,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:44,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:44,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:07:44,268 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:44,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:44,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:44,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:44,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:44,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:44,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:44,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-03-11 00:07:44,284 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:44,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:44,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:44,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:44,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:44,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:44,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:44,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-03-11 00:07:44,303 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:44,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:44,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:44,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:44,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:44,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:44,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:44,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-03-11 00:07:44,325 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:44,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:44,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:44,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:44,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:44,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:44,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:44,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:07:44,345 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:44,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:44,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:44,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:44,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:44,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:44,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:44,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-03-11 00:07:44,365 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:44,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:44,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:44,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:44,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:44,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:44,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:44,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-03-11 00:07:44,386 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:44,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:44,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:44,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:44,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:44,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:44,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:44,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-03-11 00:07:44,405 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:44,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:44,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:44,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:44,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:44,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:44,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:44,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-03-11 00:07:44,421 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:44,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:44,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:44,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:44,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:44,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:44,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:44,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-03-11 00:07:44,438 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:44,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:44,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:44,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:44,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:44,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:44,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:44,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:07:44,454 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:44,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:44,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:44,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:44,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:44,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:44,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:44,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-03-11 00:07:44,470 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:44,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:44,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:44,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:44,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:44,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:44,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:44,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-03-11 00:07:44,485 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:44,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:44,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:44,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:44,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:44,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:07:44,494 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:44,530 INFO L628 ElimStorePlain]: treesize reduction 34, result has 44.3 percent of original size [2021-03-11 00:07:44,532 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-11 00:07:44,533 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-03-11 00:07:44,568 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:07:44,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:07:44,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-03-11 00:07:44,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085076384] [2021-03-11 00:07:44,569 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:07:44,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:07:44,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:07:44,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:07:44,569 INFO L87 Difference]: Start difference. First operand 1438 states and 4784 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:07:45,192 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 67 [2021-03-11 00:07:45,665 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-03-11 00:07:45,937 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 76 [2021-03-11 00:07:46,314 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 50 [2021-03-11 00:07:46,471 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-03-11 00:07:46,777 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 64 [2021-03-11 00:07:47,214 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 58 [2021-03-11 00:07:47,427 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 58 [2021-03-11 00:07:48,000 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 69 [2021-03-11 00:07:48,636 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2021-03-11 00:07:48,820 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-03-11 00:07:49,370 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2021-03-11 00:07:49,566 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2021-03-11 00:07:49,879 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 55 [2021-03-11 00:07:50,098 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 44 [2021-03-11 00:07:50,356 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2021-03-11 00:07:50,518 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-03-11 00:07:50,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:07:50,933 INFO L93 Difference]: Finished difference Result 3246 states and 10037 transitions. [2021-03-11 00:07:50,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-03-11 00:07:50,934 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:07:50,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:07:50,940 INFO L225 Difference]: With dead ends: 3246 [2021-03-11 00:07:50,940 INFO L226 Difference]: Without dead ends: 3201 [2021-03-11 00:07:50,941 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1191 ImplicationChecksByTransitivity, 6253.7ms TimeCoverageRelationStatistics Valid=659, Invalid=3247, Unknown=0, NotChecked=0, Total=3906 [2021-03-11 00:07:50,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3201 states. [2021-03-11 00:07:50,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3201 to 1453. [2021-03-11 00:07:50,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1453 states, 1452 states have (on average 3.34297520661157) internal successors, (4854), 1452 states have internal predecessors, (4854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:07:50,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1453 states to 1453 states and 4854 transitions. [2021-03-11 00:07:50,987 INFO L78 Accepts]: Start accepts. Automaton has 1453 states and 4854 transitions. Word has length 26 [2021-03-11 00:07:50,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:07:50,987 INFO L480 AbstractCegarLoop]: Abstraction has 1453 states and 4854 transitions. [2021-03-11 00:07:50,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:07:50,987 INFO L276 IsEmpty]: Start isEmpty. Operand 1453 states and 4854 transitions. [2021-03-11 00:07:50,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:07:50,990 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:07:50,990 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:07:51,190 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable606 [2021-03-11 00:07:51,191 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:07:51,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:07:51,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1873451990, now seen corresponding path program 40 times [2021-03-11 00:07:51,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:07:51,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959481956] [2021-03-11 00:07:51,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:07:51,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:07:51,635 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2021-03-11 00:07:51,926 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:07:51,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959481956] [2021-03-11 00:07:51,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834262174] [2021-03-11 00:07:51,926 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 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 [2021-03-11 00:07:51,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:07:51,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:07:51,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:07:51,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:07:52,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:52,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:52,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:52,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:52,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:52,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-03-11 00:07:52,772 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:52,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:52,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:52,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:52,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:52,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:52,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:07:52,792 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:52,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:52,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:52,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:52,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:52,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:52,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-03-11 00:07:52,810 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:52,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:52,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:52,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:52,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:52,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:52,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 13 [2021-03-11 00:07:52,830 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:52,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:52,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:52,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:52,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:52,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:52,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:07:52,846 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:52,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:52,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:52,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:52,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:52,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:52,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:07:52,864 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:52,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:52,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:52,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:52,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:52,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:52,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-03-11 00:07:52,883 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:52,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:52,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:52,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:52,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:52,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:52,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-03-11 00:07:52,903 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:52,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:52,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:52,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:52,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:52,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:52,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-03-11 00:07:52,940 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:52,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:52,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:52,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:52,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:52,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:52,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-03-11 00:07:52,958 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:52,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:52,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:52,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:52,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:52,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:52,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-03-11 00:07:52,975 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:52,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:52,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:52,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:52,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:52,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:52,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:07:52,991 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:52,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:52,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:53,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:53,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:53,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:53,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-03-11 00:07:53,009 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:53,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:53,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:53,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:53,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:53,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:53,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-03-11 00:07:53,026 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:53,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:53,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:07:53,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:07:53,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2021-03-11 00:07:53,037 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:07:53,092 INFO L628 ElimStorePlain]: treesize reduction 34, result has 44.3 percent of original size [2021-03-11 00:07:53,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-11 00:07:53,095 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:685, output treesize:21 [2021-03-11 00:07:53,135 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:07:53,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:07:53,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-03-11 00:07:53,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718513027] [2021-03-11 00:07:53,136 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:07:53,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:07:53,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:07:53,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:07:53,137 INFO L87 Difference]: Start difference. First operand 1453 states and 4854 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:07:53,327 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 34 [2021-03-11 00:07:53,618 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2021-03-11 00:07:53,966 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 69 [2021-03-11 00:07:54,159 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 40 [2021-03-11 00:07:54,389 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2021-03-11 00:07:54,551 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 39 [2021-03-11 00:07:54,871 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 68 [2021-03-11 00:07:55,009 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 36 [2021-03-11 00:07:55,282 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 50 [2021-03-11 00:07:55,781 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 65 [2021-03-11 00:07:56,023 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-03-11 00:07:56,176 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2021-03-11 00:07:56,410 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 61 [2021-03-11 00:07:56,731 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-03-11 00:07:57,026 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 71 [2021-03-11 00:07:57,485 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2021-03-11 00:07:58,149 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 45 [2021-03-11 00:07:58,332 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 43 [2021-03-11 00:07:58,584 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2021-03-11 00:07:58,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:07:58,906 INFO L93 Difference]: Finished difference Result 3018 states and 9515 transitions. [2021-03-11 00:07:58,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-11 00:07:58,907 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:07:58,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:07:58,913 INFO L225 Difference]: With dead ends: 3018 [2021-03-11 00:07:58,914 INFO L226 Difference]: Without dead ends: 2973 [2021-03-11 00:07:58,914 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 959 ImplicationChecksByTransitivity, 5768.3ms TimeCoverageRelationStatistics Valid=591, Invalid=2601, Unknown=0, NotChecked=0, Total=3192 [2021-03-11 00:07:58,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2973 states. [2021-03-11 00:07:58,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2973 to 1456. [2021-03-11 00:07:58,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1456 states, 1455 states have (on average 3.3450171821305843) internal successors, (4867), 1455 states have internal predecessors, (4867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:07:58,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 4867 transitions. [2021-03-11 00:07:58,957 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 4867 transitions. Word has length 26 [2021-03-11 00:07:58,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:07:58,957 INFO L480 AbstractCegarLoop]: Abstraction has 1456 states and 4867 transitions. [2021-03-11 00:07:58,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:07:58,957 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 4867 transitions. [2021-03-11 00:07:58,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:07:58,960 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:07:58,960 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:07:59,164 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable712 [2021-03-11 00:07:59,165 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:07:59,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:07:59,165 INFO L82 PathProgramCache]: Analyzing trace with hash -39803338, now seen corresponding path program 41 times [2021-03-11 00:07:59,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:07:59,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214388856] [2021-03-11 00:07:59,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:07:59,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:07:59,442 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2021-03-11 00:07:59,582 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2021-03-11 00:07:59,829 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-03-11 00:07:59,950 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-03-11 00:08:00,072 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-03-11 00:08:00,259 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:00,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214388856] [2021-03-11 00:08:00,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471476966] [2021-03-11 00:08:00,260 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 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 [2021-03-11 00:08:00,286 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:08:00,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:08:00,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:08:00,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:08:01,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:01,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:01,046 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:01,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-03-11 00:08:01,058 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:01,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:01,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:01,096 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-03-11 00:08:01,096 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 26 [2021-03-11 00:08:01,101 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:01,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:01,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:01,146 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-03-11 00:08:01,146 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 33 [2021-03-11 00:08:01,149 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:01,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:01,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:01,190 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-03-11 00:08:01,190 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 25 [2021-03-11 00:08:01,193 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:01,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:01,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:01,241 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-03-11 00:08:01,241 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 28 [2021-03-11 00:08:01,244 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:01,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:01,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:01,289 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-03-11 00:08:01,289 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 35 [2021-03-11 00:08:01,293 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:01,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:01,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:01,334 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-03-11 00:08:01,335 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 28 [2021-03-11 00:08:01,364 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:01,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:01,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:01,403 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-03-11 00:08:01,404 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 28 [2021-03-11 00:08:01,406 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:01,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:01,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:01,433 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:08:01,433 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-03-11 00:08:01,434 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:01,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:01,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:01,459 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:08:01,460 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-03-11 00:08:01,461 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:01,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:01,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:01,505 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-03-11 00:08:01,506 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 25 [2021-03-11 00:08:01,508 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:01,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:01,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:01,540 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:08:01,540 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-03-11 00:08:01,541 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:01,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:01,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:01,582 INFO L354 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2021-03-11 00:08:01,583 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 23 [2021-03-11 00:08:01,586 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:01,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:01,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:01,625 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-03-11 00:08:01,625 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 25 [2021-03-11 00:08:01,628 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:01,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:01,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:01,654 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:08:01,654 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-03-11 00:08:01,655 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:01,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:01,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:01,671 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:08:01,671 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-03-11 00:08:01,672 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:01,838 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 26 [2021-03-11 00:08:01,838 INFO L628 ElimStorePlain]: treesize reduction 171, result has 38.7 percent of original size [2021-03-11 00:08:01,841 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:08:01,841 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:761, output treesize:90 [2021-03-11 00:08:01,989 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:01,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:08:01,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-03-11 00:08:01,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301098033] [2021-03-11 00:08:01,990 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:08:01,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:08:01,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:08:01,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:08:01,990 INFO L87 Difference]: Start difference. First operand 1456 states and 4867 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:02,158 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 34 [2021-03-11 00:08:02,502 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 40 [2021-03-11 00:08:02,677 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2021-03-11 00:08:02,801 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-03-11 00:08:03,013 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 65 [2021-03-11 00:08:03,216 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 44 [2021-03-11 00:08:03,492 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2021-03-11 00:08:03,675 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2021-03-11 00:08:03,973 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 70 [2021-03-11 00:08:04,182 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 41 [2021-03-11 00:08:04,392 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-03-11 00:08:04,645 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 47 [2021-03-11 00:08:04,847 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-03-11 00:08:05,337 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 61 [2021-03-11 00:08:05,622 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2021-03-11 00:08:05,818 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2021-03-11 00:08:06,096 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 63 [2021-03-11 00:08:06,506 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 82 [2021-03-11 00:08:06,694 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-03-11 00:08:07,005 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 70 [2021-03-11 00:08:07,470 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2021-03-11 00:08:07,787 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 57 [2021-03-11 00:08:08,560 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 48 [2021-03-11 00:08:08,992 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 46 [2021-03-11 00:08:09,218 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 44 [2021-03-11 00:08:09,666 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 48 [2021-03-11 00:08:10,055 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 42 [2021-03-11 00:08:10,326 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-03-11 00:08:10,627 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-03-11 00:08:10,884 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 62 [2021-03-11 00:08:11,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:08:11,200 INFO L93 Difference]: Finished difference Result 3484 states and 10843 transitions. [2021-03-11 00:08:11,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-03-11 00:08:11,201 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:08:11,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:08:11,208 INFO L225 Difference]: With dead ends: 3484 [2021-03-11 00:08:11,208 INFO L226 Difference]: Without dead ends: 3424 [2021-03-11 00:08:11,209 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1289 ImplicationChecksByTransitivity, 8910.3ms TimeCoverageRelationStatistics Valid=813, Invalid=3347, Unknown=0, NotChecked=0, Total=4160 [2021-03-11 00:08:11,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3424 states. [2021-03-11 00:08:11,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3424 to 1469. [2021-03-11 00:08:11,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1469 states, 1468 states have (on average 3.356267029972752) internal successors, (4927), 1468 states have internal predecessors, (4927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:11,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1469 states to 1469 states and 4927 transitions. [2021-03-11 00:08:11,248 INFO L78 Accepts]: Start accepts. Automaton has 1469 states and 4927 transitions. Word has length 26 [2021-03-11 00:08:11,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:08:11,248 INFO L480 AbstractCegarLoop]: Abstraction has 1469 states and 4927 transitions. [2021-03-11 00:08:11,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:11,248 INFO L276 IsEmpty]: Start isEmpty. Operand 1469 states and 4927 transitions. [2021-03-11 00:08:11,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:08:11,251 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:08:11,251 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:08:11,451 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable808 [2021-03-11 00:08:11,452 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:08:11,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:08:11,452 INFO L82 PathProgramCache]: Analyzing trace with hash 950706158, now seen corresponding path program 13 times [2021-03-11 00:08:11,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:08:11,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922537600] [2021-03-11 00:08:11,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:08:11,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:08:11,827 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2021-03-11 00:08:11,993 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 33 [2021-03-11 00:08:12,196 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2021-03-11 00:08:12,400 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2021-03-11 00:08:12,528 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-03-11 00:08:12,580 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:12,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922537600] [2021-03-11 00:08:12,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489784648] [2021-03-11 00:08:12,580 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 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 [2021-03-11 00:08:12,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:08:12,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-11 00:08:12,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:08:13,307 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2021-03-11 00:08:13,386 INFO L446 ElimStorePlain]: Different costs {2=[A, v_prenex_38], 3=[v_prenex_40, v_prenex_36]} [2021-03-11 00:08:13,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:13,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:13,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:13,399 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 28 treesize of output 16 [2021-03-11 00:08:13,401 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:13,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:13,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:13,410 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 33 treesize of output 19 [2021-03-11 00:08:13,412 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:13,640 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2021-03-11 00:08:13,641 INFO L628 ElimStorePlain]: treesize reduction 114, result has 55.3 percent of original size [2021-03-11 00:08:13,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:13,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:13,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:13,653 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 28 treesize of output 16 [2021-03-11 00:08:13,655 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:13,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:13,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:13,662 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 21 treesize of output 13 [2021-03-11 00:08:13,664 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:13,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:13,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:13,756 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 21 treesize of output 13 [2021-03-11 00:08:13,759 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:13,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:13,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:13,828 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 11 treesize of output 7 [2021-03-11 00:08:13,831 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:13,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:13,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:08:13,891 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:293, output treesize:61 [2021-03-11 00:08:13,977 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:13,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:08:13,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-11 00:08:13,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160298537] [2021-03-11 00:08:13,978 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:08:13,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:08:13,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:08:13,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:08:13,979 INFO L87 Difference]: Start difference. First operand 1469 states and 4927 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:14,794 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2021-03-11 00:08:15,344 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-11 00:08:15,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:08:15,425 INFO L93 Difference]: Finished difference Result 1822 states and 6002 transitions. [2021-03-11 00:08:15,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-11 00:08:15,426 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:08:15,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:08:15,430 INFO L225 Difference]: With dead ends: 1822 [2021-03-11 00:08:15,430 INFO L226 Difference]: Without dead ends: 1807 [2021-03-11 00:08:15,430 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 2582.6ms TimeCoverageRelationStatistics Valid=145, Invalid=611, Unknown=0, NotChecked=0, Total=756 [2021-03-11 00:08:15,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1807 states. [2021-03-11 00:08:15,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1807 to 1461. [2021-03-11 00:08:15,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1461 states, 1460 states have (on average 3.3602739726027395) internal successors, (4906), 1460 states have internal predecessors, (4906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:15,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1461 states to 1461 states and 4906 transitions. [2021-03-11 00:08:15,457 INFO L78 Accepts]: Start accepts. Automaton has 1461 states and 4906 transitions. Word has length 26 [2021-03-11 00:08:15,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:08:15,457 INFO L480 AbstractCegarLoop]: Abstraction has 1461 states and 4906 transitions. [2021-03-11 00:08:15,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:15,457 INFO L276 IsEmpty]: Start isEmpty. Operand 1461 states and 4906 transitions. [2021-03-11 00:08:15,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:08:15,460 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:08:15,460 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:08:15,661 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable909 [2021-03-11 00:08:15,661 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:08:15,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:08:15,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1721464722, now seen corresponding path program 14 times [2021-03-11 00:08:15,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:08:15,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104208524] [2021-03-11 00:08:15,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:08:15,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:08:15,962 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-03-11 00:08:16,165 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 35 [2021-03-11 00:08:16,281 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-03-11 00:08:16,476 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:16,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104208524] [2021-03-11 00:08:16,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560184257] [2021-03-11 00:08:16,476 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 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 [2021-03-11 00:08:16,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:08:16,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:08:16,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-11 00:08:16,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:08:16,861 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-03-11 00:08:17,457 INFO L354 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2021-03-11 00:08:17,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 39 [2021-03-11 00:08:17,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:17,496 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-03-11 00:08:17,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 28 [2021-03-11 00:08:17,498 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:17,779 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-03-11 00:08:17,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:17,816 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:17,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 43 [2021-03-11 00:08:17,822 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:17,865 INFO L354 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2021-03-11 00:08:17,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 36 [2021-03-11 00:08:17,876 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:18,412 WARN L205 SmtUtils]: Spent 535.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 78 [2021-03-11 00:08:18,413 INFO L628 ElimStorePlain]: treesize reduction 18, result has 94.8 percent of original size [2021-03-11 00:08:18,457 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-03-11 00:08:18,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-03-11 00:08:18,460 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:18,499 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-03-11 00:08:18,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 29 [2021-03-11 00:08:18,506 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:18,762 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-03-11 00:08:18,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:18,802 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:18,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 34 [2021-03-11 00:08:18,816 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:18,854 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-03-11 00:08:18,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 29 [2021-03-11 00:08:18,861 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:19,094 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-03-11 00:08:19,094 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:19,169 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:08:19,169 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:365, output treesize:857 [2021-03-11 00:08:20,229 WARN L205 SmtUtils]: Spent 958.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 106 [2021-03-11 00:08:20,795 WARN L205 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2021-03-11 00:08:21,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:21,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:08:21,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-03-11 00:08:21,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234113831] [2021-03-11 00:08:21,010 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:08:21,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:08:21,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:08:21,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:08:21,010 INFO L87 Difference]: Start difference. First operand 1461 states and 4906 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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) [2021-03-11 00:08:21,342 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 22 [2021-03-11 00:08:21,596 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 28 [2021-03-11 00:08:22,307 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 45 [2021-03-11 00:08:22,592 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-11 00:08:23,236 WARN L205 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 48 [2021-03-11 00:08:23,596 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 46 [2021-03-11 00:08:24,542 WARN L205 SmtUtils]: Spent 891.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 108 [2021-03-11 00:08:25,152 WARN L205 SmtUtils]: Spent 530.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 49 [2021-03-11 00:08:25,944 WARN L205 SmtUtils]: Spent 646.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 56 [2021-03-11 00:08:26,908 WARN L205 SmtUtils]: Spent 862.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 75 [2021-03-11 00:08:27,579 WARN L205 SmtUtils]: Spent 613.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 58 [2021-03-11 00:08:28,093 WARN L205 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 56 [2021-03-11 00:08:28,782 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 69 [2021-03-11 00:08:29,518 WARN L205 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-03-11 00:08:30,575 WARN L205 SmtUtils]: Spent 657.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 75 [2021-03-11 00:08:31,622 WARN L205 SmtUtils]: Spent 984.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 123 [2021-03-11 00:08:32,286 WARN L205 SmtUtils]: Spent 590.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 57 [2021-03-11 00:08:33,122 WARN L205 SmtUtils]: Spent 759.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 90 [2021-03-11 00:08:33,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:08:33,315 INFO L93 Difference]: Finished difference Result 2104 states and 6764 transitions. [2021-03-11 00:08:33,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-11 00:08:33,317 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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) Word has length 26 [2021-03-11 00:08:33,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:08:33,321 INFO L225 Difference]: With dead ends: 2104 [2021-03-11 00:08:33,321 INFO L226 Difference]: Without dead ends: 2089 [2021-03-11 00:08:33,322 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 13429.6ms TimeCoverageRelationStatistics Valid=280, Invalid=1526, Unknown=0, NotChecked=0, Total=1806 [2021-03-11 00:08:33,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2021-03-11 00:08:33,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 1465. [2021-03-11 00:08:33,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1465 states, 1464 states have (on average 3.365437158469945) internal successors, (4927), 1464 states have internal predecessors, (4927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:33,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1465 states to 1465 states and 4927 transitions. [2021-03-11 00:08:33,367 INFO L78 Accepts]: Start accepts. Automaton has 1465 states and 4927 transitions. Word has length 26 [2021-03-11 00:08:33,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:08:33,368 INFO L480 AbstractCegarLoop]: Abstraction has 1465 states and 4927 transitions. [2021-03-11 00:08:33,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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) [2021-03-11 00:08:33,368 INFO L276 IsEmpty]: Start isEmpty. Operand 1465 states and 4927 transitions. [2021-03-11 00:08:33,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:08:33,372 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:08:33,372 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:08:33,587 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable921,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:08:33,587 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:08:33,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:08:33,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1741432748, now seen corresponding path program 15 times [2021-03-11 00:08:33,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:08:33,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507883406] [2021-03-11 00:08:33,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:08:33,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:08:33,992 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2021-03-11 00:08:34,249 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 35 [2021-03-11 00:08:34,473 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2021-03-11 00:08:34,661 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:34,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507883406] [2021-03-11 00:08:34,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850264072] [2021-03-11 00:08:34,661 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 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 [2021-03-11 00:08:34,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:08:34,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:08:34,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:08:34,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:08:35,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:35,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:35,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:35,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:35,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:35,380 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:08:35,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:08:35,382 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:35,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:35,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:35,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:35,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:35,408 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:35,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 27 [2021-03-11 00:08:35,411 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:35,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:35,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:35,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:35,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:35,434 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:08:35,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:08:35,435 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:35,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:35,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:35,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:35,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:35,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:35,459 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:08:35,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:08:35,460 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:35,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:35,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:35,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:35,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:35,499 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:08:35,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:08:35,501 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:35,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:35,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:35,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:35,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:35,529 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:35,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 24 [2021-03-11 00:08:35,537 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:35,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:35,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:35,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:35,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:35,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:35,566 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:35,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 24 [2021-03-11 00:08:35,570 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:35,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:35,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:35,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:35,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:35,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:35,609 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:08:35,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-03-11 00:08:35,612 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:35,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:35,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:35,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:35,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:35,642 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:08:35,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 20 [2021-03-11 00:08:35,645 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:35,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:35,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:35,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:35,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:35,673 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:35,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 27 [2021-03-11 00:08:35,678 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:35,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:35,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:35,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:35,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:35,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:35,702 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:08:35,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:08:35,704 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:35,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:35,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:35,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:35,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:35,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:35,731 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:35,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-03-11 00:08:35,738 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:35,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:35,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:35,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:35,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:35,761 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:08:35,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:08:35,762 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:35,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:35,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:35,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:35,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:35,785 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:08:35,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-03-11 00:08:35,787 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:35,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:35,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:35,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:35,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:35,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:35,813 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:08:35,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:08:35,815 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:35,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:35,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:35,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:35,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:35,841 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:08:35,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-03-11 00:08:35,845 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:36,026 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-11 00:08:36,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:36,036 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:08:36,036 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:825, output treesize:196 [2021-03-11 00:08:36,312 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-03-11 00:08:36,472 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:36,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:08:36,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-11 00:08:36,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912779114] [2021-03-11 00:08:36,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:08:36,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:08:36,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:08:36,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:08:36,474 INFO L87 Difference]: Start difference. First operand 1465 states and 4927 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:37,035 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 27 [2021-03-11 00:08:37,352 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 43 [2021-03-11 00:08:37,545 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-03-11 00:08:37,994 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 47 [2021-03-11 00:08:38,516 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2021-03-11 00:08:38,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:08:38,558 INFO L93 Difference]: Finished difference Result 2031 states and 6671 transitions. [2021-03-11 00:08:38,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-11 00:08:38,558 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:08:38,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:08:38,562 INFO L225 Difference]: With dead ends: 2031 [2021-03-11 00:08:38,562 INFO L226 Difference]: Without dead ends: 2016 [2021-03-11 00:08:38,562 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 2986.7ms TimeCoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2021-03-11 00:08:38,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2016 states. [2021-03-11 00:08:38,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2016 to 1462. [2021-03-11 00:08:38,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1462 states, 1461 states have (on average 3.36208076659822) internal successors, (4912), 1461 states have internal predecessors, (4912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:38,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1462 states to 1462 states and 4912 transitions. [2021-03-11 00:08:38,581 INFO L78 Accepts]: Start accepts. Automaton has 1462 states and 4912 transitions. Word has length 26 [2021-03-11 00:08:38,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:08:38,581 INFO L480 AbstractCegarLoop]: Abstraction has 1462 states and 4912 transitions. [2021-03-11 00:08:38,581 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:38,581 INFO L276 IsEmpty]: Start isEmpty. Operand 1462 states and 4912 transitions. [2021-03-11 00:08:38,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:08:38,583 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:08:38,583 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:08:38,795 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1001 [2021-03-11 00:08:38,795 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:08:38,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:08:38,796 INFO L82 PathProgramCache]: Analyzing trace with hash 576217266, now seen corresponding path program 16 times [2021-03-11 00:08:38,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:08:38,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138095723] [2021-03-11 00:08:38,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:08:38,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:08:39,113 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2021-03-11 00:08:39,336 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2021-03-11 00:08:39,541 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2021-03-11 00:08:39,725 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-03-11 00:08:39,904 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-03-11 00:08:39,949 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:39,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138095723] [2021-03-11 00:08:39,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576797401] [2021-03-11 00:08:39,950 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 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 [2021-03-11 00:08:39,981 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:08:39,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:08:39,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-11 00:08:39,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:08:40,579 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-11 00:08:40,998 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 48 [2021-03-11 00:08:41,100 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_55], 2=[A, v_prenex_56]} [2021-03-11 00:08:41,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:41,108 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 21 treesize of output 13 [2021-03-11 00:08:41,110 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:41,303 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-03-11 00:08:41,303 INFO L628 ElimStorePlain]: treesize reduction 54, result has 69.8 percent of original size [2021-03-11 00:08:41,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:41,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:41,312 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 28 treesize of output 16 [2021-03-11 00:08:41,314 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:41,393 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:41,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:41,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:41,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:41,403 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 28 treesize of output 16 [2021-03-11 00:08:41,405 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:41,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:41,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:41,412 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 21 treesize of output 13 [2021-03-11 00:08:41,415 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:41,480 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:41,483 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:08:41,483 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:193, output treesize:51 [2021-03-11 00:08:41,582 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:41,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:08:41,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-11 00:08:41,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850898148] [2021-03-11 00:08:41,583 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:08:41,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:08:41,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:08:41,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:08:41,584 INFO L87 Difference]: Start difference. First operand 1462 states and 4912 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:42,096 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 36 [2021-03-11 00:08:42,250 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2021-03-11 00:08:42,791 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 39 [2021-03-11 00:08:43,386 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 48 [2021-03-11 00:08:43,774 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2021-03-11 00:08:44,115 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-03-11 00:08:44,891 WARN L205 SmtUtils]: Spent 670.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2021-03-11 00:08:45,466 WARN L205 SmtUtils]: Spent 526.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2021-03-11 00:08:45,667 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 31 [2021-03-11 00:08:46,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:08:46,003 INFO L93 Difference]: Finished difference Result 2123 states and 6934 transitions. [2021-03-11 00:08:46,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-11 00:08:46,004 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:08:46,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:08:46,009 INFO L225 Difference]: With dead ends: 2123 [2021-03-11 00:08:46,009 INFO L226 Difference]: Without dead ends: 2108 [2021-03-11 00:08:46,010 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 5191.9ms TimeCoverageRelationStatistics Valid=227, Invalid=963, Unknown=0, NotChecked=0, Total=1190 [2021-03-11 00:08:46,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2021-03-11 00:08:46,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 1465. [2021-03-11 00:08:46,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1465 states, 1464 states have (on average 3.3633879781420766) internal successors, (4924), 1464 states have internal predecessors, (4924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:46,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1465 states to 1465 states and 4924 transitions. [2021-03-11 00:08:46,045 INFO L78 Accepts]: Start accepts. Automaton has 1465 states and 4924 transitions. Word has length 26 [2021-03-11 00:08:46,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:08:46,045 INFO L480 AbstractCegarLoop]: Abstraction has 1465 states and 4924 transitions. [2021-03-11 00:08:46,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:08:46,045 INFO L276 IsEmpty]: Start isEmpty. Operand 1465 states and 4924 transitions. [2021-03-11 00:08:46,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:08:46,049 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:08:46,049 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:08:46,249 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1078,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:08:46,250 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:08:46,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:08:46,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1041315514, now seen corresponding path program 17 times [2021-03-11 00:08:46,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:08:46,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919751360] [2021-03-11 00:08:46,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:08:46,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:08:46,555 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2021-03-11 00:08:46,698 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2021-03-11 00:08:46,868 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2021-03-11 00:08:47,018 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-03-11 00:08:47,228 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:47,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919751360] [2021-03-11 00:08:47,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006186256] [2021-03-11 00:08:47,228 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 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 [2021-03-11 00:08:47,251 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:08:47,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:08:47,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:08:47,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:08:47,913 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-11 00:08:48,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:48,018 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:48,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-03-11 00:08:48,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:48,231 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-03-11 00:08:48,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:48,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:48,255 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:08:48,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-03-11 00:08:48,258 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:48,456 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-03-11 00:08:48,456 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:48,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:48,480 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:48,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-03-11 00:08:48,483 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:48,677 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-03-11 00:08:48,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:48,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:48,700 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:08:48,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-03-11 00:08:48,704 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:48,886 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-03-11 00:08:48,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:48,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:48,909 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:08:48,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-03-11 00:08:48,911 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:49,088 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-03-11 00:08:49,089 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:49,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:49,110 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:49,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-03-11 00:08:49,113 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:49,290 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-03-11 00:08:49,291 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:49,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:49,307 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:49,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-03-11 00:08:49,311 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:49,430 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-03-11 00:08:49,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:49,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:49,443 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:49,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-03-11 00:08:49,446 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:49,560 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-03-11 00:08:49,561 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:08:49,577 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:08:49,577 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:309, output treesize:174 [2021-03-11 00:08:49,741 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-11 00:08:49,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:49,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:08:49,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-11 00:08:49,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768173130] [2021-03-11 00:08:49,909 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:08:49,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:08:49,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:08:49,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:08:49,909 INFO L87 Difference]: Start difference. First operand 1465 states and 4924 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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) [2021-03-11 00:08:50,074 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 28 [2021-03-11 00:08:50,246 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 28 [2021-03-11 00:08:50,688 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 38 [2021-03-11 00:08:50,944 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 40 [2021-03-11 00:08:51,203 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-03-11 00:08:51,628 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 45 [2021-03-11 00:08:52,046 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2021-03-11 00:08:52,440 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 47 [2021-03-11 00:08:52,861 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 45 [2021-03-11 00:08:53,188 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-03-11 00:08:53,871 WARN L205 SmtUtils]: Spent 523.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2021-03-11 00:08:54,824 WARN L205 SmtUtils]: Spent 892.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 57 [2021-03-11 00:08:54,995 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-11 00:08:55,404 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-03-11 00:08:55,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:08:55,660 INFO L93 Difference]: Finished difference Result 2065 states and 6709 transitions. [2021-03-11 00:08:55,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:08:55,661 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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) Word has length 26 [2021-03-11 00:08:55,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:08:55,665 INFO L225 Difference]: With dead ends: 2065 [2021-03-11 00:08:55,666 INFO L226 Difference]: Without dead ends: 2035 [2021-03-11 00:08:55,666 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 6243.6ms TimeCoverageRelationStatistics Valid=274, Invalid=1286, Unknown=0, NotChecked=0, Total=1560 [2021-03-11 00:08:55,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2035 states. [2021-03-11 00:08:55,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2035 to 1459. [2021-03-11 00:08:55,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1459 states, 1458 states have (on average 3.3607681755829906) internal successors, (4900), 1458 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) [2021-03-11 00:08:55,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1459 states to 1459 states and 4900 transitions. [2021-03-11 00:08:55,704 INFO L78 Accepts]: Start accepts. Automaton has 1459 states and 4900 transitions. Word has length 26 [2021-03-11 00:08:55,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:08:55,705 INFO L480 AbstractCegarLoop]: Abstraction has 1459 states and 4900 transitions. [2021-03-11 00:08:55,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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) [2021-03-11 00:08:55,705 INFO L276 IsEmpty]: Start isEmpty. Operand 1459 states and 4900 transitions. [2021-03-11 00:08:55,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:08:55,708 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:08:55,708 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:08:55,927 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1088 [2021-03-11 00:08:55,928 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:08:55,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:08:55,928 INFO L82 PathProgramCache]: Analyzing trace with hash -2091148486, now seen corresponding path program 18 times [2021-03-11 00:08:55,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:08:55,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417868444] [2021-03-11 00:08:55,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:08:55,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:08:56,224 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-03-11 00:08:56,391 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2021-03-11 00:08:56,544 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 28 [2021-03-11 00:08:56,696 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-03-11 00:08:56,843 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2021-03-11 00:08:56,913 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:56,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417868444] [2021-03-11 00:08:56,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924726343] [2021-03-11 00:08:56,914 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 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 [2021-03-11 00:08:56,944 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:08:56,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:08:56,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:08:56,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:08:57,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:57,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:57,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:57,612 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 13 [2021-03-11 00:08:57,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:57,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:57,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:57,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:57,625 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 33 treesize of output 19 [2021-03-11 00:08:57,626 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:57,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:57,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:57,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:57,638 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 28 treesize of output 16 [2021-03-11 00:08:57,639 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:57,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:57,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:57,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:57,651 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 33 treesize of output 19 [2021-03-11 00:08:57,653 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:57,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:57,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:57,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:57,668 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 28 treesize of output 16 [2021-03-11 00:08:57,670 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:57,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:57,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:57,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:57,682 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 13 [2021-03-11 00:08:57,685 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:57,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:57,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:57,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:57,697 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 21 treesize of output 13 [2021-03-11 00:08:57,699 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:57,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:57,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:57,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:57,720 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 31 treesize of output 19 [2021-03-11 00:08:57,722 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:57,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:57,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:57,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:57,735 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 19 [2021-03-11 00:08:57,738 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:57,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:57,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:57,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:57,750 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 31 treesize of output 19 [2021-03-11 00:08:57,751 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:57,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:57,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:57,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:57,762 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 21 treesize of output 13 [2021-03-11 00:08:57,764 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:57,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:57,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:57,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:57,777 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 33 treesize of output 19 [2021-03-11 00:08:57,778 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:57,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:57,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:57,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:57,790 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 28 treesize of output 16 [2021-03-11 00:08:57,792 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:57,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:57,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:57,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:57,803 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 28 treesize of output 16 [2021-03-11 00:08:57,804 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:57,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:08:57,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:08:57,811 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 33 treesize of output 19 [2021-03-11 00:08:57,812 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:08:57,943 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-03-11 00:08:57,944 INFO L628 ElimStorePlain]: treesize reduction 25, result has 75.0 percent of original size [2021-03-11 00:08:57,947 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:08:57,947 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 2 variables, input treesize:588, output treesize:51 [2021-03-11 00:08:58,045 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:08:58,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:08:58,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-03-11 00:08:58,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599134627] [2021-03-11 00:08:58,045 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:08:58,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:08:58,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:08:58,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:08:58,046 INFO L87 Difference]: Start difference. First operand 1459 states and 4900 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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) [2021-03-11 00:08:58,589 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 36 [2021-03-11 00:08:58,732 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 35 [2021-03-11 00:08:59,140 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 33 [2021-03-11 00:08:59,382 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2021-03-11 00:08:59,859 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2021-03-11 00:09:00,121 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2021-03-11 00:09:00,304 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-03-11 00:09:00,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:09:00,612 INFO L93 Difference]: Finished difference Result 1950 states and 6361 transitions. [2021-03-11 00:09:00,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-11 00:09:00,613 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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) Word has length 26 [2021-03-11 00:09:00,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:09:00,617 INFO L225 Difference]: With dead ends: 1950 [2021-03-11 00:09:00,617 INFO L226 Difference]: Without dead ends: 1925 [2021-03-11 00:09:00,617 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 3159.7ms TimeCoverageRelationStatistics Valid=185, Invalid=871, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:09:00,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1925 states. [2021-03-11 00:09:00,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1925 to 1494. [2021-03-11 00:09:00,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1493 states have (on average 3.3563295378432687) internal successors, (5011), 1493 states have internal predecessors, (5011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:00,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 5011 transitions. [2021-03-11 00:09:00,645 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 5011 transitions. Word has length 26 [2021-03-11 00:09:00,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:09:00,645 INFO L480 AbstractCegarLoop]: Abstraction has 1494 states and 5011 transitions. [2021-03-11 00:09:00,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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) [2021-03-11 00:09:00,645 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 5011 transitions. [2021-03-11 00:09:00,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:09:00,648 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:09:00,648 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:09:00,848 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1103,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:09:00,848 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:09:00,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:09:00,849 INFO L82 PathProgramCache]: Analyzing trace with hash -31506310, now seen corresponding path program 19 times [2021-03-11 00:09:00,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:09:00,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703736376] [2021-03-11 00:09:00,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:09:00,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:01,137 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-03-11 00:09:01,276 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 32 [2021-03-11 00:09:01,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:09:01,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703736376] [2021-03-11 00:09:01,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364339634] [2021-03-11 00:09:01,614 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 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 [2021-03-11 00:09:01,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:01,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-11 00:09:01,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:09:02,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:02,158 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:09:02,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-03-11 00:09:02,162 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:02,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:02,183 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:02,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-03-11 00:09:02,186 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:02,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:02,207 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:02,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-03-11 00:09:02,213 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:02,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:02,230 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:09:02,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:09:02,231 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:02,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:02,254 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:02,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-03-11 00:09:02,257 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:02,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:02,273 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:09:02,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:09:02,275 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:02,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:02,292 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:09:02,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-03-11 00:09:02,293 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:02,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:02,311 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:09:02,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-03-11 00:09:02,313 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:02,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:02,336 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:02,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-03-11 00:09:02,344 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:02,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:02,377 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:02,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-03-11 00:09:02,383 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:02,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:02,407 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:09:02,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-03-11 00:09:02,409 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:02,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:02,440 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:09:02,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-03-11 00:09:02,443 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:02,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:02,461 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:09:02,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:09:02,463 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:02,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:02,480 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:09:02,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-03-11 00:09:02,482 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:02,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:02,499 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:09:02,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:09:02,501 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:02,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:02,518 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:09:02,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-03-11 00:09:02,521 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:02,682 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-11 00:09:02,683 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:02,690 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:09:02,690 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:689, output treesize:174 [2021-03-11 00:09:02,854 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-11 00:09:03,042 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:09:03,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:09:03,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-11 00:09:03,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092585792] [2021-03-11 00:09:03,042 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:09:03,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:09:03,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:09:03,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:09:03,043 INFO L87 Difference]: Start difference. First operand 1494 states and 5011 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:03,293 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 28 [2021-03-11 00:09:04,086 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2021-03-11 00:09:04,732 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-03-11 00:09:05,006 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-11 00:09:05,382 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2021-03-11 00:09:05,592 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-03-11 00:09:05,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:09:05,738 INFO L93 Difference]: Finished difference Result 2167 states and 7052 transitions. [2021-03-11 00:09:05,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-11 00:09:05,739 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:09:05,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:09:05,744 INFO L225 Difference]: With dead ends: 2167 [2021-03-11 00:09:05,744 INFO L226 Difference]: Without dead ends: 2142 [2021-03-11 00:09:05,744 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 3084.2ms TimeCoverageRelationStatistics Valid=223, Invalid=833, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:09:05,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2142 states. [2021-03-11 00:09:05,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2142 to 1497. [2021-03-11 00:09:05,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1497 states, 1496 states have (on average 3.356951871657754) internal successors, (5022), 1496 states have internal predecessors, (5022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:05,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1497 states to 1497 states and 5022 transitions. [2021-03-11 00:09:05,774 INFO L78 Accepts]: Start accepts. Automaton has 1497 states and 5022 transitions. Word has length 26 [2021-03-11 00:09:05,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:09:05,774 INFO L480 AbstractCegarLoop]: Abstraction has 1497 states and 5022 transitions. [2021-03-11 00:09:05,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:05,775 INFO L276 IsEmpty]: Start isEmpty. Operand 1497 states and 5022 transitions. [2021-03-11 00:09:05,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:09:05,778 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:09:05,778 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:09:05,979 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1135 [2021-03-11 00:09:05,979 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:09:05,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:09:05,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1960184130, now seen corresponding path program 20 times [2021-03-11 00:09:05,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:09:05,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132303660] [2021-03-11 00:09:05,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:09:05,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:06,290 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-03-11 00:09:06,420 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 35 [2021-03-11 00:09:06,726 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:09:06,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132303660] [2021-03-11 00:09:06,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968633680] [2021-03-11 00:09:06,727 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 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 [2021-03-11 00:09:06,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:09:06,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:09:06,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-11 00:09:06,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:09:07,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:07,365 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:07,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-03-11 00:09:07,368 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:07,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:07,388 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:07,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-03-11 00:09:07,393 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:07,604 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-03-11 00:09:07,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:07,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:07,621 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:09:07,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-03-11 00:09:07,623 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:07,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:07,634 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:07,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-03-11 00:09:07,636 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:07,789 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-03-11 00:09:07,789 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:07,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:07,811 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:09:07,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-03-11 00:09:07,813 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:07,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:07,826 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:07,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-03-11 00:09:07,832 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:08,030 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-03-11 00:09:08,030 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:08,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:08,053 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:09:08,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-03-11 00:09:08,056 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:08,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:08,072 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:08,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-03-11 00:09:08,079 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:08,259 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-03-11 00:09:08,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:08,280 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:09:08,281 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:309, output treesize:174 [2021-03-11 00:09:08,442 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-11 00:09:08,617 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:09:08,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:09:08,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-03-11 00:09:08,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839173136] [2021-03-11 00:09:08,618 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:09:08,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:09:08,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:09:08,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:09:08,618 INFO L87 Difference]: Start difference. First operand 1497 states and 5022 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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) [2021-03-11 00:09:10,037 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-03-11 00:09:10,281 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-11 00:09:10,590 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 32 [2021-03-11 00:09:10,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:09:10,716 INFO L93 Difference]: Finished difference Result 1676 states and 5533 transitions. [2021-03-11 00:09:10,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-11 00:09:10,717 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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) Word has length 26 [2021-03-11 00:09:10,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:09:10,721 INFO L225 Difference]: With dead ends: 1676 [2021-03-11 00:09:10,721 INFO L226 Difference]: Without dead ends: 1651 [2021-03-11 00:09:10,721 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 2592.7ms TimeCoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2021-03-11 00:09:10,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1651 states. [2021-03-11 00:09:10,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1651 to 1510. [2021-03-11 00:09:10,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1510 states, 1509 states have (on average 3.3631544068919816) internal successors, (5075), 1509 states have internal predecessors, (5075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:10,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1510 states to 1510 states and 5075 transitions. [2021-03-11 00:09:10,747 INFO L78 Accepts]: Start accepts. Automaton has 1510 states and 5075 transitions. Word has length 26 [2021-03-11 00:09:10,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:09:10,747 INFO L480 AbstractCegarLoop]: Abstraction has 1510 states and 5075 transitions. [2021-03-11 00:09:10,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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) [2021-03-11 00:09:10,747 INFO L276 IsEmpty]: Start isEmpty. Operand 1510 states and 5075 transitions. [2021-03-11 00:09:10,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:09:10,750 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:09:10,751 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:09:10,955 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1176 [2021-03-11 00:09:10,955 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:09:10,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:09:10,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1800748254, now seen corresponding path program 21 times [2021-03-11 00:09:10,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:09:10,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113206526] [2021-03-11 00:09:10,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:09:10,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:11,412 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 49 [2021-03-11 00:09:11,655 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 39 [2021-03-11 00:09:12,006 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2021-03-11 00:09:12,128 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2021-03-11 00:09:12,250 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2021-03-11 00:09:12,299 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:09:12,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113206526] [2021-03-11 00:09:12,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582951456] [2021-03-11 00:09:12,299 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 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 [2021-03-11 00:09:12,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:09:12,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:09:12,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-11 00:09:12,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:09:12,706 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-11 00:09:13,060 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-03-11 00:09:13,459 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 55 [2021-03-11 00:09:13,587 INFO L446 ElimStorePlain]: Different costs {1=[A], 2=[v_prenex_85, v_prenex_84]} [2021-03-11 00:09:13,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:13,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-03-11 00:09:13,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:13,809 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-03-11 00:09:13,809 INFO L628 ElimStorePlain]: treesize reduction 54, result has 69.8 percent of original size [2021-03-11 00:09:13,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:13,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:13,817 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 28 treesize of output 16 [2021-03-11 00:09:13,818 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:13,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:13,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:13,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:13,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:13,914 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 28 treesize of output 16 [2021-03-11 00:09:13,916 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:13,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:13,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:13,923 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 21 treesize of output 13 [2021-03-11 00:09:13,926 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:13,998 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:14,003 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:09:14,003 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:193, output treesize:51 [2021-03-11 00:09:14,155 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:09:14,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:09:14,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-11 00:09:14,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244731977] [2021-03-11 00:09:14,155 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:09:14,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:09:14,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:09:14,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:09:14,156 INFO L87 Difference]: Start difference. First operand 1510 states and 5075 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:14,942 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-03-11 00:09:15,237 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-03-11 00:09:15,511 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-11 00:09:15,920 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-03-11 00:09:16,592 WARN L205 SmtUtils]: Spent 580.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 73 [2021-03-11 00:09:16,901 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-03-11 00:09:17,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:09:17,231 INFO L93 Difference]: Finished difference Result 2093 states and 6807 transitions. [2021-03-11 00:09:17,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-11 00:09:17,232 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:09:17,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:09:17,236 INFO L225 Difference]: With dead ends: 2093 [2021-03-11 00:09:17,236 INFO L226 Difference]: Without dead ends: 2048 [2021-03-11 00:09:17,237 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 4567.3ms TimeCoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:09:17,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2048 states. [2021-03-11 00:09:17,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2048 to 1554. [2021-03-11 00:09:17,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1554 states, 1553 states have (on average 3.3708950418544754) internal successors, (5235), 1553 states have internal predecessors, (5235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:17,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1554 states to 1554 states and 5235 transitions. [2021-03-11 00:09:17,305 INFO L78 Accepts]: Start accepts. Automaton has 1554 states and 5235 transitions. Word has length 26 [2021-03-11 00:09:17,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:09:17,305 INFO L480 AbstractCegarLoop]: Abstraction has 1554 states and 5235 transitions. [2021-03-11 00:09:17,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:17,305 INFO L276 IsEmpty]: Start isEmpty. Operand 1554 states and 5235 transitions. [2021-03-11 00:09:17,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:09:17,311 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:09:17,311 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:09:17,537 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1207 [2021-03-11 00:09:17,538 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:09:17,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:09:17,538 INFO L82 PathProgramCache]: Analyzing trace with hash 183215474, now seen corresponding path program 22 times [2021-03-11 00:09:17,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:09:17,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104370242] [2021-03-11 00:09:17,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:09:17,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:17,824 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2021-03-11 00:09:18,073 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 37 [2021-03-11 00:09:18,290 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:09:18,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104370242] [2021-03-11 00:09:18,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845542919] [2021-03-11 00:09:18,290 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 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 [2021-03-11 00:09:18,312 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:09:18,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:09:18,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:09:18,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:09:18,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:18,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:18,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:18,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:18,716 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:09:18,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:09:18,717 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:18,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:18,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:18,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:18,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:18,744 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:18,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 27 [2021-03-11 00:09:18,747 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:18,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:18,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:18,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:18,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:18,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:18,769 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:09:18,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:09:18,770 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:18,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:18,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:18,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:18,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:18,797 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:18,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 24 [2021-03-11 00:09:18,804 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:18,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:18,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:18,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:18,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:18,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:18,834 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:09:18,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-03-11 00:09:18,837 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:18,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:18,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:18,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:18,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:18,860 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:09:18,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:09:18,862 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:18,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:18,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:18,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:18,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:18,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:18,892 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:18,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 24 [2021-03-11 00:09:18,895 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:18,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:18,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:18,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:18,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:18,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:18,924 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:18,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-03-11 00:09:18,932 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:18,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:18,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:18,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:18,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:18,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:18,955 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:09:18,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:09:18,957 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:18,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:18,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:18,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:18,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:18,979 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:09:18,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:09:18,980 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:18,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:18,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:18,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:18,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:19,009 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:09:19,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 20 [2021-03-11 00:09:19,012 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:19,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:19,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:19,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:19,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:19,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:19,040 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:09:19,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:09:19,042 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:19,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:19,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:19,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:19,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:19,068 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:09:19,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-03-11 00:09:19,070 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:19,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:19,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:19,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:19,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:19,098 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:19,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 27 [2021-03-11 00:09:19,102 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:19,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:19,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:19,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:19,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:19,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:19,127 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:09:19,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:09:19,128 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:19,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:19,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:19,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:19,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:19,147 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:09:19,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 17 [2021-03-11 00:09:19,150 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:19,289 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-11 00:09:19,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:19,292 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:09:19,292 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:729, output treesize:181 [2021-03-11 00:09:19,464 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-11 00:09:19,662 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:09:19,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:09:19,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-03-11 00:09:19,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235621235] [2021-03-11 00:09:19,663 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:09:19,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:09:19,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:09:19,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:09:19,664 INFO L87 Difference]: Start difference. First operand 1554 states and 5235 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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) [2021-03-11 00:09:20,825 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2021-03-11 00:09:21,166 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2021-03-11 00:09:21,516 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 33 [2021-03-11 00:09:21,860 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-03-11 00:09:22,099 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2021-03-11 00:09:22,414 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 48 [2021-03-11 00:09:22,808 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-03-11 00:09:23,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:09:23,053 INFO L93 Difference]: Finished difference Result 2012 states and 6621 transitions. [2021-03-11 00:09:23,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-11 00:09:23,054 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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) Word has length 26 [2021-03-11 00:09:23,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:09:23,059 INFO L225 Difference]: With dead ends: 2012 [2021-03-11 00:09:23,059 INFO L226 Difference]: Without dead ends: 1993 [2021-03-11 00:09:23,059 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 3634.5ms TimeCoverageRelationStatistics Valid=220, Invalid=970, Unknown=0, NotChecked=0, Total=1190 [2021-03-11 00:09:23,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1993 states. [2021-03-11 00:09:23,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1993 to 1545. [2021-03-11 00:09:23,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1545 states, 1544 states have (on average 3.3678756476683938) internal successors, (5200), 1544 states have internal predecessors, (5200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:23,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1545 states to 1545 states and 5200 transitions. [2021-03-11 00:09:23,087 INFO L78 Accepts]: Start accepts. Automaton has 1545 states and 5200 transitions. Word has length 26 [2021-03-11 00:09:23,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:09:23,088 INFO L480 AbstractCegarLoop]: Abstraction has 1545 states and 5200 transitions. [2021-03-11 00:09:23,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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) [2021-03-11 00:09:23,088 INFO L276 IsEmpty]: Start isEmpty. Operand 1545 states and 5200 transitions. [2021-03-11 00:09:23,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:09:23,090 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:09:23,090 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:09:23,290 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1217,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:09:23,291 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:09:23,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:09:23,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1506727430, now seen corresponding path program 23 times [2021-03-11 00:09:23,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:09:23,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486927698] [2021-03-11 00:09:23,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:09:23,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:23,581 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 37 [2021-03-11 00:09:23,716 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 31 [2021-03-11 00:09:23,902 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2021-03-11 00:09:24,025 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-03-11 00:09:24,151 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:09:24,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486927698] [2021-03-11 00:09:24,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162466377] [2021-03-11 00:09:24,151 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 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 [2021-03-11 00:09:24,177 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:09:24,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:09:24,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-11 00:09:24,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:09:24,608 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-11 00:09:25,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:25,153 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:09:25,153 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-03-11 00:09:25,156 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:25,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:25,189 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:25,189 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-03-11 00:09:25,207 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:25,908 WARN L205 SmtUtils]: Spent 700.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 78 [2021-03-11 00:09:25,908 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.3 percent of original size [2021-03-11 00:09:25,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:25,957 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:09:25,957 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-03-11 00:09:25,965 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:25,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:26,011 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:09:26,012 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-03-11 00:09:26,015 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:26,312 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-03-11 00:09:26,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:26,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:26,359 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:09:26,359 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-03-11 00:09:26,362 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:26,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:26,390 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:26,391 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-03-11 00:09:26,398 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:27,006 WARN L205 SmtUtils]: Spent 607.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2021-03-11 00:09:27,007 INFO L628 ElimStorePlain]: treesize reduction 9, result has 96.9 percent of original size [2021-03-11 00:09:27,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:27,039 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:27,039 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-03-11 00:09:27,049 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:27,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:27,081 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:09:27,081 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-03-11 00:09:27,085 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:27,338 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-03-11 00:09:27,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:27,380 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:09:27,380 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:361, output treesize:309 [2021-03-11 00:09:27,862 WARN L205 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2021-03-11 00:09:28,065 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:09:28,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:09:28,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-11 00:09:28,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092048084] [2021-03-11 00:09:28,066 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:09:28,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:09:28,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:09:28,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:09:28,066 INFO L87 Difference]: Start difference. First operand 1545 states and 5200 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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) [2021-03-11 00:09:28,320 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 29 [2021-03-11 00:09:28,657 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-03-11 00:09:28,804 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 36 [2021-03-11 00:09:29,398 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 43 [2021-03-11 00:09:30,488 WARN L205 SmtUtils]: Spent 890.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 79 [2021-03-11 00:09:30,943 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-11 00:09:31,166 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-03-11 00:09:31,866 WARN L205 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2021-03-11 00:09:31,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:09:31,986 INFO L93 Difference]: Finished difference Result 2065 states and 6802 transitions. [2021-03-11 00:09:31,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-11 00:09:31,987 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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) Word has length 26 [2021-03-11 00:09:31,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:09:31,992 INFO L225 Difference]: With dead ends: 2065 [2021-03-11 00:09:31,992 INFO L226 Difference]: Without dead ends: 2040 [2021-03-11 00:09:31,992 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 4733.9ms TimeCoverageRelationStatistics Valid=180, Invalid=812, Unknown=0, NotChecked=0, Total=992 [2021-03-11 00:09:31,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2040 states. [2021-03-11 00:09:32,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2040 to 1545. [2021-03-11 00:09:32,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1545 states, 1544 states have (on average 3.3678756476683938) internal successors, (5200), 1544 states have internal predecessors, (5200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:32,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1545 states to 1545 states and 5200 transitions. [2021-03-11 00:09:32,020 INFO L78 Accepts]: Start accepts. Automaton has 1545 states and 5200 transitions. Word has length 26 [2021-03-11 00:09:32,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:09:32,021 INFO L480 AbstractCegarLoop]: Abstraction has 1545 states and 5200 transitions. [2021-03-11 00:09:32,021 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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) [2021-03-11 00:09:32,021 INFO L276 IsEmpty]: Start isEmpty. Operand 1545 states and 5200 transitions. [2021-03-11 00:09:32,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:09:32,024 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:09:32,024 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:09:32,224 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1242 [2021-03-11 00:09:32,224 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:09:32,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:09:32,225 INFO L82 PathProgramCache]: Analyzing trace with hash -132958662, now seen corresponding path program 42 times [2021-03-11 00:09:32,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:09:32,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823312826] [2021-03-11 00:09:32,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:09:32,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:32,586 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2021-03-11 00:09:32,782 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2021-03-11 00:09:32,915 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 30 [2021-03-11 00:09:33,217 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:09:33,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823312826] [2021-03-11 00:09:33,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751317854] [2021-03-11 00:09:33,217 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 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 [2021-03-11 00:09:33,240 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:09:33,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:09:33,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:09:33,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:09:34,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:34,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:34,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:34,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:34,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:34,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:34,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-03-11 00:09:34,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:34,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:34,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:34,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:34,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:34,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:34,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:34,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-03-11 00:09:34,322 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:34,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:34,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:34,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:34,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:34,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:34,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:34,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-03-11 00:09:34,344 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:34,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:34,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:34,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:34,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:34,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:34,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:34,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-03-11 00:09:34,369 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:34,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:34,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:34,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:34,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:34,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:34,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:34,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2021-03-11 00:09:34,394 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:34,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:34,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:34,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:34,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:34,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:34,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:34,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-03-11 00:09:34,418 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:34,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:34,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:34,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:34,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:34,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:34,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:34,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-03-11 00:09:34,439 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:34,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:34,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:34,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:34,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:34,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:34,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:34,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-03-11 00:09:34,462 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:34,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:34,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:34,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:34,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:34,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:34,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:34,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 16 [2021-03-11 00:09:34,484 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:34,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:34,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:34,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:34,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:34,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:34,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:34,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 13 [2021-03-11 00:09:34,508 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:34,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:34,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:34,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:34,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:34,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:34,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:34,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-03-11 00:09:34,532 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:34,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:34,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:34,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:34,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:34,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:34,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:34,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-03-11 00:09:34,555 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:34,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:34,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:34,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:34,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:34,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:34,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:34,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-03-11 00:09:34,578 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:34,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:34,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:34,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:34,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:34,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:34,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:34,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 13 [2021-03-11 00:09:34,603 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:34,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:34,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:34,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:34,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:34,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:34,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:34,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-03-11 00:09:34,623 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:34,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:34,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:34,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:34,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:34,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2021-03-11 00:09:34,637 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:34,706 INFO L628 ElimStorePlain]: treesize reduction 38, result has 49.3 percent of original size [2021-03-11 00:09:34,708 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-11 00:09:34,708 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:27 [2021-03-11 00:09:34,767 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:09:34,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:09:34,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-03-11 00:09:34,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296906883] [2021-03-11 00:09:34,768 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:09:34,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:09:34,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:09:34,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:09:34,769 INFO L87 Difference]: Start difference. First operand 1545 states and 5200 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:35,843 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 34 [2021-03-11 00:09:36,089 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 37 [2021-03-11 00:09:36,249 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 36 [2021-03-11 00:09:36,503 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-03-11 00:09:37,108 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2021-03-11 00:09:37,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:09:37,257 INFO L93 Difference]: Finished difference Result 1992 states and 6522 transitions. [2021-03-11 00:09:37,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-11 00:09:37,258 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:09:37,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:09:37,262 INFO L225 Difference]: With dead ends: 1992 [2021-03-11 00:09:37,262 INFO L226 Difference]: Without dead ends: 1966 [2021-03-11 00:09:37,262 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 2974.4ms TimeCoverageRelationStatistics Valid=246, Invalid=1014, Unknown=0, NotChecked=0, Total=1260 [2021-03-11 00:09:37,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1966 states. [2021-03-11 00:09:37,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1966 to 1549. [2021-03-11 00:09:37,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1549 states, 1548 states have (on average 3.3656330749354004) internal successors, (5210), 1548 states have internal predecessors, (5210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:37,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1549 states to 1549 states and 5210 transitions. [2021-03-11 00:09:37,305 INFO L78 Accepts]: Start accepts. Automaton has 1549 states and 5210 transitions. Word has length 26 [2021-03-11 00:09:37,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:09:37,305 INFO L480 AbstractCegarLoop]: Abstraction has 1549 states and 5210 transitions. [2021-03-11 00:09:37,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:37,305 INFO L276 IsEmpty]: Start isEmpty. Operand 1549 states and 5210 transitions. [2021-03-11 00:09:37,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:09:37,307 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:09:37,308 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:09:37,517 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1302 [2021-03-11 00:09:37,517 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:09:37,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:09:37,518 INFO L82 PathProgramCache]: Analyzing trace with hash 934915902, now seen corresponding path program 43 times [2021-03-11 00:09:37,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:09:37,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073242880] [2021-03-11 00:09:37,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:09:37,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:37,816 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 36 [2021-03-11 00:09:37,981 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2021-03-11 00:09:38,113 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 29 [2021-03-11 00:09:38,411 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:09:38,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073242880] [2021-03-11 00:09:38,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985119502] [2021-03-11 00:09:38,412 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 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 [2021-03-11 00:09:38,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:38,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:09:38,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:09:39,013 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-03-11 00:09:39,124 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_97, v_prenex_95], 5=[A, v_prenex_93]} [2021-03-11 00:09:39,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:39,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:39,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:39,135 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 23 treesize of output 13 [2021-03-11 00:09:39,137 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:39,357 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2021-03-11 00:09:39,357 INFO L628 ElimStorePlain]: treesize reduction 146, result has 43.6 percent of original size [2021-03-11 00:09:39,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:39,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:39,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:39,367 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 23 treesize of output 13 [2021-03-11 00:09:39,370 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:39,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:39,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:39,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:09:39,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:39,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-03-11 00:09:39,453 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:39,514 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:39,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:09:39,520 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 27 treesize of output 13 [2021-03-11 00:09:39,522 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:39,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:39,579 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-11 00:09:39,580 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:294, output treesize:33 [2021-03-11 00:09:39,673 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:09:39,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:09:39,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-03-11 00:09:39,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536412902] [2021-03-11 00:09:39,673 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:09:39,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:09:39,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:09:39,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:09:39,674 INFO L87 Difference]: Start difference. First operand 1549 states and 5210 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:40,587 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 27 [2021-03-11 00:09:41,091 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 30 [2021-03-11 00:09:41,284 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 33 [2021-03-11 00:09:41,554 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 31 [2021-03-11 00:09:42,068 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 35 [2021-03-11 00:09:42,273 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 33 [2021-03-11 00:09:42,479 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 32 [2021-03-11 00:09:43,091 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2021-03-11 00:09:43,677 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2021-03-11 00:09:43,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:09:43,998 INFO L93 Difference]: Finished difference Result 2165 states and 7087 transitions. [2021-03-11 00:09:43,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-11 00:09:43,999 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:09:43,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:09:44,004 INFO L225 Difference]: With dead ends: 2165 [2021-03-11 00:09:44,004 INFO L226 Difference]: Without dead ends: 2150 [2021-03-11 00:09:44,004 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 4542.9ms TimeCoverageRelationStatistics Valid=441, Invalid=1815, Unknown=0, NotChecked=0, Total=2256 [2021-03-11 00:09:44,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2150 states. [2021-03-11 00:09:44,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2150 to 1549. [2021-03-11 00:09:44,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1549 states, 1548 states have (on average 3.3656330749354004) internal successors, (5210), 1548 states have internal predecessors, (5210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:44,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1549 states to 1549 states and 5210 transitions. [2021-03-11 00:09:44,035 INFO L78 Accepts]: Start accepts. Automaton has 1549 states and 5210 transitions. Word has length 26 [2021-03-11 00:09:44,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:09:44,035 INFO L480 AbstractCegarLoop]: Abstraction has 1549 states and 5210 transitions. [2021-03-11 00:09:44,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:09:44,035 INFO L276 IsEmpty]: Start isEmpty. Operand 1549 states and 5210 transitions. [2021-03-11 00:09:44,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:09:44,038 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:09:44,039 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:09:44,239 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1416 [2021-03-11 00:09:44,239 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:09:44,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:09:44,239 INFO L82 PathProgramCache]: Analyzing trace with hash 346540478, now seen corresponding path program 24 times [2021-03-11 00:09:44,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:09:44,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364141103] [2021-03-11 00:09:44,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:09:44,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:09:44,595 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 40 [2021-03-11 00:09:44,862 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2021-03-11 00:09:45,097 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2021-03-11 00:09:45,331 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 32 [2021-03-11 00:09:45,524 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 29 [2021-03-11 00:09:45,612 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:09:45,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364141103] [2021-03-11 00:09:45,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350029303] [2021-03-11 00:09:45,612 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 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 [2021-03-11 00:09:45,635 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:09:45,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:09:45,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:09:45,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:09:46,039 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-11 00:09:46,421 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-03-11 00:09:47,137 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:47,138 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-03-11 00:09:47,148 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:47,422 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-03-11 00:09:47,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:47,462 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:09:47,463 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-03-11 00:09:47,467 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:47,639 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-03-11 00:09:47,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:47,681 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:09:47,681 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-03-11 00:09:47,683 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:47,905 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-03-11 00:09:47,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:47,947 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:09:47,947 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-03-11 00:09:47,957 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:48,186 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-03-11 00:09:48,187 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:48,222 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:48,222 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-03-11 00:09:48,227 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:48,479 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-03-11 00:09:48,480 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:48,519 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:09:48,519 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-03-11 00:09:48,522 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:48,779 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-03-11 00:09:48,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:48,816 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:48,816 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-03-11 00:09:48,819 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:49,090 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-03-11 00:09:49,090 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:49,133 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:09:49,134 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-03-11 00:09:49,137 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:09:49,391 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-03-11 00:09:49,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:09:49,413 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:09:49,414 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:349, output treesize:430 [2021-03-11 00:09:49,972 WARN L205 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-03-11 00:09:50,210 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-11 00:09:50,406 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 20 [2021-03-11 00:09:50,423 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:09:50,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:09:50,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-11 00:09:50,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858716534] [2021-03-11 00:09:50,424 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:09:50,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:09:50,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:09:50,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:09:50,425 INFO L87 Difference]: Start difference. First operand 1549 states and 5210 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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) [2021-03-11 00:09:50,823 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 27 [2021-03-11 00:09:51,335 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-03-11 00:09:51,490 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 33 [2021-03-11 00:09:51,762 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 40 [2021-03-11 00:09:52,236 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-03-11 00:09:52,649 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 48 [2021-03-11 00:09:53,190 WARN L205 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 61 [2021-03-11 00:09:53,461 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 41 [2021-03-11 00:09:54,236 WARN L205 SmtUtils]: Spent 667.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2021-03-11 00:09:55,256 WARN L205 SmtUtils]: Spent 915.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2021-03-11 00:09:55,908 WARN L205 SmtUtils]: Spent 546.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 63 [2021-03-11 00:09:56,705 WARN L205 SmtUtils]: Spent 705.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2021-03-11 00:09:57,900 WARN L205 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 96 DAG size of output: 80 [2021-03-11 00:09:58,670 WARN L205 SmtUtils]: Spent 677.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 71 [2021-03-11 00:10:00,021 WARN L205 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 96 DAG size of output: 82 [2021-03-11 00:10:01,162 WARN L205 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 106 DAG size of output: 79 [2021-03-11 00:10:02,657 WARN L205 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 93 DAG size of output: 80 [2021-03-11 00:10:03,701 WARN L205 SmtUtils]: Spent 633.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 62 [2021-03-11 00:10:04,692 WARN L205 SmtUtils]: Spent 578.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 59 [2021-03-11 00:10:05,610 WARN L205 SmtUtils]: Spent 646.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 61 [2021-03-11 00:10:06,197 WARN L205 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 44 [2021-03-11 00:10:06,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:10:06,517 INFO L93 Difference]: Finished difference Result 2516 states and 7932 transitions. [2021-03-11 00:10:06,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-11 00:10:06,518 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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) Word has length 26 [2021-03-11 00:10:06,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:10:06,524 INFO L225 Difference]: With dead ends: 2516 [2021-03-11 00:10:06,524 INFO L226 Difference]: Without dead ends: 2452 [2021-03-11 00:10:06,524 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 17199.8ms TimeCoverageRelationStatistics Valid=411, Invalid=1941, Unknown=0, NotChecked=0, Total=2352 [2021-03-11 00:10:06,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2452 states. [2021-03-11 00:10:06,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2452 to 1584. [2021-03-11 00:10:06,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1584 states, 1583 states have (on average 3.370183196462413) internal successors, (5335), 1583 states have internal predecessors, (5335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:06,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1584 states to 1584 states and 5335 transitions. [2021-03-11 00:10:06,557 INFO L78 Accepts]: Start accepts. Automaton has 1584 states and 5335 transitions. Word has length 26 [2021-03-11 00:10:06,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:10:06,557 INFO L480 AbstractCegarLoop]: Abstraction has 1584 states and 5335 transitions. [2021-03-11 00:10:06,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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) [2021-03-11 00:10:06,557 INFO L276 IsEmpty]: Start isEmpty. Operand 1584 states and 5335 transitions. [2021-03-11 00:10:06,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:10:06,560 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:10:06,560 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:10:06,760 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1430 [2021-03-11 00:10:06,761 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:10:06,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:10:06,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1896922042, now seen corresponding path program 44 times [2021-03-11 00:10:06,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:10:06,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369699607] [2021-03-11 00:10:06,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:10:06,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:10:07,117 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 35 [2021-03-11 00:10:07,379 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 33 [2021-03-11 00:10:07,558 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 32 [2021-03-11 00:10:07,719 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 26 [2021-03-11 00:10:07,909 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:10:07,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369699607] [2021-03-11 00:10:07,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583449468] [2021-03-11 00:10:07,910 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 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 [2021-03-11 00:10:07,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:10:07,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:10:07,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-11 00:10:07,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:10:08,920 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-03-11 00:10:09,679 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_139], 5=[v_prenex_141, v_prenex_137]} [2021-03-11 00:10:09,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:09,739 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:10:09,739 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-03-11 00:10:09,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:09,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:09,795 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:10:09,795 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-03-11 00:10:09,800 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:10,218 WARN L205 SmtUtils]: Spent 417.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-03-11 00:10:10,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:10,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:10,269 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:10:10,269 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-03-11 00:10:10,273 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:10,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:10,310 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:10,310 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-03-11 00:10:10,327 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:10,728 WARN L205 SmtUtils]: Spent 400.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-03-11 00:10:10,729 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:10,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:10,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:10,792 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:10:10,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 24 [2021-03-11 00:10:10,796 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:10,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:10,831 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:10,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-03-11 00:10:10,844 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:11,188 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-03-11 00:10:11,189 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:11,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:11,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:11,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:11,247 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:10:11,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 28 [2021-03-11 00:10:11,252 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:11,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:11,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:11,296 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:10:11,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 28 [2021-03-11 00:10:11,299 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:11,597 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-03-11 00:10:11,598 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:11,628 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:10:11,628 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:393, output treesize:161 [2021-03-11 00:10:11,898 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2021-03-11 00:10:12,004 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:10:12,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:10:12,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-11 00:10:12,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435990085] [2021-03-11 00:10:12,005 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-11 00:10:12,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:10:12,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-11 00:10:12,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:10:12,005 INFO L87 Difference]: Start difference. First operand 1584 states and 5335 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:12,612 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 31 [2021-03-11 00:10:12,844 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 36 [2021-03-11 00:10:13,128 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 30 [2021-03-11 00:10:13,506 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 41 [2021-03-11 00:10:13,814 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 37 [2021-03-11 00:10:14,059 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 31 [2021-03-11 00:10:14,359 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 38 [2021-03-11 00:10:14,554 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 34 [2021-03-11 00:10:15,130 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 35 [2021-03-11 00:10:15,460 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 39 [2021-03-11 00:10:15,763 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-03-11 00:10:15,983 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-03-11 00:10:16,293 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 39 [2021-03-11 00:10:16,530 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2021-03-11 00:10:16,726 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 42 [2021-03-11 00:10:16,997 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 38 [2021-03-11 00:10:17,281 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-03-11 00:10:17,828 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 52 [2021-03-11 00:10:18,322 WARN L205 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 49 [2021-03-11 00:10:18,775 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 46 [2021-03-11 00:10:19,310 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-03-11 00:10:19,497 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 22 [2021-03-11 00:10:19,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:10:19,565 INFO L93 Difference]: Finished difference Result 2425 states and 7700 transitions. [2021-03-11 00:10:19,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-11 00:10:19,566 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:10:19,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:10:19,572 INFO L225 Difference]: With dead ends: 2425 [2021-03-11 00:10:19,572 INFO L226 Difference]: Without dead ends: 2381 [2021-03-11 00:10:19,572 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 863 ImplicationChecksByTransitivity, 8465.9ms TimeCoverageRelationStatistics Valid=486, Invalid=2376, Unknown=0, NotChecked=0, Total=2862 [2021-03-11 00:10:19,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2381 states. [2021-03-11 00:10:19,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2381 to 1591. [2021-03-11 00:10:19,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1591 states, 1590 states have (on average 3.3710691823899372) internal successors, (5360), 1590 states have internal predecessors, (5360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:19,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1591 states to 1591 states and 5360 transitions. [2021-03-11 00:10:19,610 INFO L78 Accepts]: Start accepts. Automaton has 1591 states and 5360 transitions. Word has length 26 [2021-03-11 00:10:19,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:10:19,610 INFO L480 AbstractCegarLoop]: Abstraction has 1591 states and 5360 transitions. [2021-03-11 00:10:19,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:19,610 INFO L276 IsEmpty]: Start isEmpty. Operand 1591 states and 5360 transitions. [2021-03-11 00:10:19,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:10:19,614 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:10:19,614 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:10:19,827 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1478 [2021-03-11 00:10:19,827 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:10:19,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:10:19,828 INFO L82 PathProgramCache]: Analyzing trace with hash 920603198, now seen corresponding path program 45 times [2021-03-11 00:10:19,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:10:19,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924872016] [2021-03-11 00:10:19,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:10:19,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:10:20,161 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-03-11 00:10:20,308 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-03-11 00:10:20,446 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 21 [2021-03-11 00:10:20,590 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-03-11 00:10:20,736 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-03-11 00:10:20,881 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-03-11 00:10:20,999 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:10:20,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924872016] [2021-03-11 00:10:20,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999799419] [2021-03-11 00:10:20,999 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 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 [2021-03-11 00:10:21,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:10:21,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:10:21,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:10:21,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:10:21,791 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-03-11 00:10:21,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:21,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:21,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:21,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:21,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:21,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:10:21,908 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:21,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:21,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:21,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:21,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:21,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:21,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 13 [2021-03-11 00:10:21,934 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:21,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:21,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:21,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:21,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:21,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:21,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2021-03-11 00:10:21,959 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:21,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:21,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:21,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:21,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:21,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:21,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:10:21,986 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:21,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:21,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:21,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-03-11 00:10:22,010 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:22,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:22,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 13 [2021-03-11 00:10:22,034 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:22,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:22,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2021-03-11 00:10:22,062 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:22,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:22,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2021-03-11 00:10:22,086 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:22,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:22,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-03-11 00:10:22,110 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:22,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:22,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-03-11 00:10:22,137 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:22,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:22,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 16 [2021-03-11 00:10:22,163 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:22,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:22,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-03-11 00:10:22,188 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:22,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:22,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 13 [2021-03-11 00:10:22,215 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:22,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:22,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-03-11 00:10:22,241 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:22,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:22,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 13 [2021-03-11 00:10:22,264 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:22,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:22,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:22,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 16 [2021-03-11 00:10:22,276 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:22,419 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2021-03-11 00:10:22,419 INFO L628 ElimStorePlain]: treesize reduction 60, result has 49.6 percent of original size [2021-03-11 00:10:22,421 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-11 00:10:22,422 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:913, output treesize:59 [2021-03-11 00:10:22,782 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:10:22,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:10:22,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-11 00:10:22,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005472828] [2021-03-11 00:10:22,782 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-11 00:10:22,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:10:22,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-11 00:10:22,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2021-03-11 00:10:22,783 INFO L87 Difference]: Start difference. First operand 1591 states and 5360 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:23,213 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-03-11 00:10:23,755 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-03-11 00:10:23,964 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2021-03-11 00:10:24,294 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2021-03-11 00:10:24,568 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2021-03-11 00:10:24,723 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-03-11 00:10:24,937 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2021-03-11 00:10:25,152 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2021-03-11 00:10:25,735 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-03-11 00:10:26,004 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-03-11 00:10:26,334 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-03-11 00:10:26,675 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-03-11 00:10:27,275 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-03-11 00:10:27,587 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2021-03-11 00:10:27,958 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2021-03-11 00:10:28,333 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-03-11 00:10:29,315 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2021-03-11 00:10:29,720 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-03-11 00:10:30,212 WARN L205 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2021-03-11 00:10:31,022 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2021-03-11 00:10:31,667 WARN L205 SmtUtils]: Spent 530.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2021-03-11 00:10:32,161 WARN L205 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-03-11 00:10:32,744 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 38 [2021-03-11 00:10:33,156 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 37 [2021-03-11 00:10:33,372 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 31 [2021-03-11 00:10:33,586 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-03-11 00:10:33,725 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-11 00:10:33,911 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-03-11 00:10:34,163 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 30 [2021-03-11 00:10:34,459 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-03-11 00:10:34,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:10:34,519 INFO L93 Difference]: Finished difference Result 3601 states and 11187 transitions. [2021-03-11 00:10:34,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-03-11 00:10:34,520 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:10:34,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:10:34,528 INFO L225 Difference]: With dead ends: 3601 [2021-03-11 00:10:34,529 INFO L226 Difference]: Without dead ends: 3565 [2021-03-11 00:10:34,529 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1576 ImplicationChecksByTransitivity, 11452.9ms TimeCoverageRelationStatistics Valid=846, Invalid=4124, Unknown=0, NotChecked=0, Total=4970 [2021-03-11 00:10:34,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3565 states. [2021-03-11 00:10:34,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3565 to 1723. [2021-03-11 00:10:34,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1723 states, 1722 states have (on average 3.3792102206736354) internal successors, (5819), 1722 states have internal predecessors, (5819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:34,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1723 states to 1723 states and 5819 transitions. [2021-03-11 00:10:34,576 INFO L78 Accepts]: Start accepts. Automaton has 1723 states and 5819 transitions. Word has length 26 [2021-03-11 00:10:34,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:10:34,577 INFO L480 AbstractCegarLoop]: Abstraction has 1723 states and 5819 transitions. [2021-03-11 00:10:34,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:34,577 INFO L276 IsEmpty]: Start isEmpty. Operand 1723 states and 5819 transitions. [2021-03-11 00:10:34,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:10:34,580 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:10:34,580 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:10:34,780 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1548,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:10:34,781 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:10:34,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:10:34,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1791604362, now seen corresponding path program 25 times [2021-03-11 00:10:34,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:10:34,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848306508] [2021-03-11 00:10:34,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:10:34,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:10:35,159 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 38 [2021-03-11 00:10:35,650 WARN L205 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2021-03-11 00:10:35,956 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2021-03-11 00:10:36,173 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 29 [2021-03-11 00:10:36,388 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2021-03-11 00:10:36,478 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:10:36,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848306508] [2021-03-11 00:10:36,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965379122] [2021-03-11 00:10:36,479 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 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 [2021-03-11 00:10:36,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:10:36,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-11 00:10:36,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:10:37,362 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-11 00:10:37,995 WARN L205 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 49 [2021-03-11 00:10:38,161 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_150, v_prenex_151], 3=[A, v_prenex_152]} [2021-03-11 00:10:38,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:38,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:38,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:38,176 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 33 treesize of output 19 [2021-03-11 00:10:38,179 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:38,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:38,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:38,190 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 28 treesize of output 16 [2021-03-11 00:10:38,193 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:38,539 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-03-11 00:10:38,540 INFO L628 ElimStorePlain]: treesize reduction 119, result has 50.4 percent of original size [2021-03-11 00:10:38,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:38,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:10:38,552 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 28 treesize of output 16 [2021-03-11 00:10:38,555 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:38,668 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-11 00:10:38,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:38,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:38,676 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 21 treesize of output 13 [2021-03-11 00:10:38,680 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:38,791 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-11 00:10:38,792 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:38,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:10:38,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-03-11 00:10:38,803 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:38,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:38,900 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:10:38,901 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 7 variables, input treesize:281, output treesize:56 [2021-03-11 00:10:39,061 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:10:39,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:10:39,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-11 00:10:39,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696204334] [2021-03-11 00:10:39,062 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:10:39,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:10:39,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:10:39,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:10:39,062 INFO L87 Difference]: Start difference. First operand 1723 states and 5819 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:39,404 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 28 [2021-03-11 00:10:39,822 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 43 [2021-03-11 00:10:40,342 WARN L205 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2021-03-11 00:10:41,133 WARN L205 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2021-03-11 00:10:41,654 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-03-11 00:10:41,963 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2021-03-11 00:10:42,691 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2021-03-11 00:10:43,164 WARN L205 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2021-03-11 00:10:44,054 WARN L205 SmtUtils]: Spent 834.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 74 [2021-03-11 00:10:45,239 WARN L205 SmtUtils]: Spent 945.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 80 [2021-03-11 00:10:46,038 WARN L205 SmtUtils]: Spent 618.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 72 [2021-03-11 00:10:46,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:10:46,615 INFO L93 Difference]: Finished difference Result 2316 states and 7537 transitions. [2021-03-11 00:10:46,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-11 00:10:46,618 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:10:46,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:10:46,623 INFO L225 Difference]: With dead ends: 2316 [2021-03-11 00:10:46,623 INFO L226 Difference]: Without dead ends: 2301 [2021-03-11 00:10:46,623 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 8550.8ms TimeCoverageRelationStatistics Valid=237, Invalid=819, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:10:46,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2301 states. [2021-03-11 00:10:46,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2301 to 1730. [2021-03-11 00:10:46,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1730 states, 1729 states have (on average 3.3817235396182763) internal successors, (5847), 1729 states have internal predecessors, (5847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:46,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1730 states to 1730 states and 5847 transitions. [2021-03-11 00:10:46,657 INFO L78 Accepts]: Start accepts. Automaton has 1730 states and 5847 transitions. Word has length 26 [2021-03-11 00:10:46,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:10:46,658 INFO L480 AbstractCegarLoop]: Abstraction has 1730 states and 5847 transitions. [2021-03-11 00:10:46,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:46,658 INFO L276 IsEmpty]: Start isEmpty. Operand 1730 states and 5847 transitions. [2021-03-11 00:10:46,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:10:46,661 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:10:46,661 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:10:46,861 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1568 [2021-03-11 00:10:46,862 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:10:46,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:10:46,862 INFO L82 PathProgramCache]: Analyzing trace with hash 885830154, now seen corresponding path program 26 times [2021-03-11 00:10:46,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:10:46,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306171637] [2021-03-11 00:10:46,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:10:46,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:10:47,284 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 39 [2021-03-11 00:10:47,732 WARN L205 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-03-11 00:10:48,032 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 30 [2021-03-11 00:10:48,282 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 26 [2021-03-11 00:10:48,509 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:10:48,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306171637] [2021-03-11 00:10:48,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912687364] [2021-03-11 00:10:48,509 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 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 [2021-03-11 00:10:48,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:10:48,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:10:48,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:10:48,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:10:48,953 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-11 00:10:49,262 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-03-11 00:10:49,700 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-03-11 00:10:49,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 28 [2021-03-11 00:10:49,705 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:50,103 WARN L205 SmtUtils]: Spent 398.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2021-03-11 00:10:50,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:50,186 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-03-11 00:10:50,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 32 [2021-03-11 00:10:50,190 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:50,588 WARN L205 SmtUtils]: Spent 396.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2021-03-11 00:10:50,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:50,654 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:50,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 43 [2021-03-11 00:10:50,665 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:51,522 WARN L205 SmtUtils]: Spent 857.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 152 [2021-03-11 00:10:51,523 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.6 percent of original size [2021-03-11 00:10:51,574 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:51,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 34 [2021-03-11 00:10:51,589 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:51,988 WARN L205 SmtUtils]: Spent 398.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2021-03-11 00:10:51,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:52,064 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-03-11 00:10:52,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 29 [2021-03-11 00:10:52,077 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:52,470 WARN L205 SmtUtils]: Spent 393.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2021-03-11 00:10:52,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:52,550 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-03-11 00:10:52,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 29 [2021-03-11 00:10:52,563 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:52,953 WARN L205 SmtUtils]: Spent 388.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2021-03-11 00:10:52,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:53,033 INFO L354 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2021-03-11 00:10:53,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 36 [2021-03-11 00:10:53,048 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:53,802 WARN L205 SmtUtils]: Spent 752.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 130 [2021-03-11 00:10:53,803 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.2 percent of original size [2021-03-11 00:10:53,888 INFO L354 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2021-03-11 00:10:53,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 39 [2021-03-11 00:10:53,892 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:10:54,277 WARN L205 SmtUtils]: Spent 385.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-11 00:10:54,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:10:54,347 INFO L550 ElimStorePlain]: Start of recursive call 1: 16 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:10:54,347 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 24 variables, input treesize:381, output treesize:745 [2021-03-11 00:10:55,632 WARN L205 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 86 DAG size of output: 78 [2021-03-11 00:10:56,451 WARN L205 SmtUtils]: Spent 675.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-03-11 00:10:56,715 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 20 [2021-03-11 00:10:56,751 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:10:56,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:10:56,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-03-11 00:10:56,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147670016] [2021-03-11 00:10:56,751 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:10:56,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:10:56,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:10:56,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:10:56,752 INFO L87 Difference]: Start difference. First operand 1730 states and 5847 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:10:57,138 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 30 [2021-03-11 00:10:57,552 WARN L205 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 34 [2021-03-11 00:10:57,759 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 33 [2021-03-11 00:10:58,094 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 34 [2021-03-11 00:10:58,546 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 38 [2021-03-11 00:10:58,813 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 44 [2021-03-11 00:10:59,253 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2021-03-11 00:10:59,421 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 29 [2021-03-11 00:10:59,852 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 45 [2021-03-11 00:11:00,964 WARN L205 SmtUtils]: Spent 1000.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 55 [2021-03-11 00:11:01,623 WARN L205 SmtUtils]: Spent 574.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 39 [2021-03-11 00:11:02,110 WARN L205 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2021-03-11 00:11:02,371 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-03-11 00:11:03,240 WARN L205 SmtUtils]: Spent 498.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-03-11 00:11:04,003 WARN L205 SmtUtils]: Spent 590.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 57 [2021-03-11 00:11:05,554 WARN L205 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 104 DAG size of output: 91 [2021-03-11 00:11:06,666 WARN L205 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 105 DAG size of output: 62 [2021-03-11 00:11:07,829 WARN L205 SmtUtils]: Spent 980.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 96 [2021-03-11 00:11:09,132 WARN L205 SmtUtils]: Spent 968.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 87 [2021-03-11 00:11:10,310 WARN L205 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 99 DAG size of output: 95 [2021-03-11 00:11:11,807 WARN L205 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 128 DAG size of output: 114 [2021-03-11 00:11:13,575 WARN L205 SmtUtils]: Spent 1.36 s on a formula simplification. DAG size of input: 135 DAG size of output: 111 [2021-03-11 00:11:15,673 WARN L205 SmtUtils]: Spent 1.86 s on a formula simplification. DAG size of input: 91 DAG size of output: 83 [2021-03-11 00:11:16,887 WARN L205 SmtUtils]: Spent 780.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 42 [2021-03-11 00:11:17,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:17,220 INFO L93 Difference]: Finished difference Result 2958 states and 9371 transitions. [2021-03-11 00:11:17,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-11 00:11:17,223 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:11:17,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:17,228 INFO L225 Difference]: With dead ends: 2958 [2021-03-11 00:11:17,228 INFO L226 Difference]: Without dead ends: 2920 [2021-03-11 00:11:17,228 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 22268.2ms TimeCoverageRelationStatistics Valid=425, Invalid=1737, Unknown=0, NotChecked=0, Total=2162 [2021-03-11 00:11:17,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2920 states. [2021-03-11 00:11:17,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2920 to 1734. [2021-03-11 00:11:17,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1734 states, 1733 states have (on average 3.385458742065782) internal successors, (5867), 1733 states have internal predecessors, (5867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:17,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 5867 transitions. [2021-03-11 00:11:17,265 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 5867 transitions. Word has length 26 [2021-03-11 00:11:17,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:17,265 INFO L480 AbstractCegarLoop]: Abstraction has 1734 states and 5867 transitions. [2021-03-11 00:11:17,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:17,266 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 5867 transitions. [2021-03-11 00:11:17,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:11:17,268 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:17,269 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:11:17,483 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1580,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:17,483 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:17,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:17,483 INFO L82 PathProgramCache]: Analyzing trace with hash 2122915566, now seen corresponding path program 46 times [2021-03-11 00:11:17,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:17,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350621191] [2021-03-11 00:11:17,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:17,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:17,775 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-03-11 00:11:17,913 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-03-11 00:11:18,352 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-03-11 00:11:18,508 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:18,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350621191] [2021-03-11 00:11:18,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101479787] [2021-03-11 00:11:18,508 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 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 [2021-03-11 00:11:18,533 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:11:18,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:11:18,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:11:18,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:11:18,940 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-11 00:11:19,109 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-03-11 00:11:19,286 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-11 00:11:20,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:20,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:20,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:20,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:20,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:20,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:20,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-03-11 00:11:20,188 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:20,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:20,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:20,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:20,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:20,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:20,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:20,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-03-11 00:11:20,217 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:20,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:20,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:20,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:20,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:20,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:20,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:20,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-03-11 00:11:20,244 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:20,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:20,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:20,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:20,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:20,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:20,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:20,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-03-11 00:11:20,271 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:20,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:20,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:20,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:20,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:20,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:20,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:20,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-03-11 00:11:20,300 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:20,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:20,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:20,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:20,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:20,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:20,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:20,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-03-11 00:11:20,330 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:20,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:20,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:20,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:20,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:20,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:20,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:20,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-03-11 00:11:20,360 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:20,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:20,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:20,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:20,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:20,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:20,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:20,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 13 [2021-03-11 00:11:20,393 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:20,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:20,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:20,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:20,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:20,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:20,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:20,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2021-03-11 00:11:20,425 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:20,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:20,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:20,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:20,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:20,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:20,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:20,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-03-11 00:11:20,455 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:20,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:20,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:20,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:20,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:20,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:20,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:20,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2021-03-11 00:11:20,486 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:20,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:20,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:20,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:20,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:20,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:20,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:20,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 16 [2021-03-11 00:11:20,515 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:20,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:20,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:20,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:20,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:20,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:20,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:20,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-03-11 00:11:20,544 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:20,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:20,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:20,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:20,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:20,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:20,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:20,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-03-11 00:11:20,573 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:20,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:20,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:20,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:20,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:20,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:20,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:20,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 13 [2021-03-11 00:11:20,602 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:20,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:20,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:20,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:20,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:11:20,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-03-11 00:11:20,612 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:20,696 INFO L628 ElimStorePlain]: treesize reduction 20, result has 64.9 percent of original size [2021-03-11 00:11:20,699 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-11 00:11:20,699 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:31 [2021-03-11 00:11:20,806 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:20,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:11:20,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-03-11 00:11:20,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001548250] [2021-03-11 00:11:20,807 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:11:20,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:20,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:11:20,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:11:20,808 INFO L87 Difference]: Start difference. First operand 1734 states and 5867 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:21,543 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 40 [2021-03-11 00:11:21,779 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 27 [2021-03-11 00:11:22,216 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 35 [2021-03-11 00:11:22,710 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2021-03-11 00:11:23,074 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2021-03-11 00:11:23,444 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 36 [2021-03-11 00:11:24,497 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2021-03-11 00:11:24,972 WARN L205 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 43 [2021-03-11 00:11:25,332 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-03-11 00:11:25,649 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-03-11 00:11:25,961 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-03-11 00:11:26,472 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2021-03-11 00:11:26,828 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-03-11 00:11:27,379 WARN L205 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 60 [2021-03-11 00:11:27,840 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2021-03-11 00:11:28,233 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2021-03-11 00:11:28,672 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-03-11 00:11:29,039 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-03-11 00:11:29,599 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-03-11 00:11:29,897 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 27 [2021-03-11 00:11:30,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:30,211 INFO L93 Difference]: Finished difference Result 3422 states and 10960 transitions. [2021-03-11 00:11:30,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-11 00:11:30,213 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:11:30,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:30,221 INFO L225 Difference]: With dead ends: 3422 [2021-03-11 00:11:30,221 INFO L226 Difference]: Without dead ends: 3386 [2021-03-11 00:11:30,222 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 8781.9ms TimeCoverageRelationStatistics Valid=538, Invalid=2432, Unknown=0, NotChecked=0, Total=2970 [2021-03-11 00:11:30,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3386 states. [2021-03-11 00:11:30,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3386 to 1843. [2021-03-11 00:11:30,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1843 states, 1842 states have (on average 3.4044516829533116) internal successors, (6271), 1842 states have internal predecessors, (6271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:30,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1843 states to 1843 states and 6271 transitions. [2021-03-11 00:11:30,269 INFO L78 Accepts]: Start accepts. Automaton has 1843 states and 6271 transitions. Word has length 26 [2021-03-11 00:11:30,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:30,269 INFO L480 AbstractCegarLoop]: Abstraction has 1843 states and 6271 transitions. [2021-03-11 00:11:30,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:30,270 INFO L276 IsEmpty]: Start isEmpty. Operand 1843 states and 6271 transitions. [2021-03-11 00:11:30,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:11:30,274 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:30,274 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:11:30,489 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1631 [2021-03-11 00:11:30,489 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:30,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:30,489 INFO L82 PathProgramCache]: Analyzing trace with hash -338403078, now seen corresponding path program 47 times [2021-03-11 00:11:30,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:30,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834825901] [2021-03-11 00:11:30,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:30,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:30,949 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 31 [2021-03-11 00:11:31,159 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 34 [2021-03-11 00:11:31,451 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2021-03-11 00:11:31,655 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-03-11 00:11:31,797 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2021-03-11 00:11:31,937 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2021-03-11 00:11:32,067 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:32,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834825901] [2021-03-11 00:11:32,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864949231] [2021-03-11 00:11:32,067 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 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 [2021-03-11 00:11:32,090 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:11:32,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:11:32,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:11:32,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:11:32,697 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-11 00:11:33,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:33,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:33,498 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-03-11 00:11:33,498 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 31 [2021-03-11 00:11:33,502 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:33,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:33,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:33,579 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-03-11 00:11:33,579 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 28 [2021-03-11 00:11:33,584 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:33,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:33,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:33,667 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-03-11 00:11:33,667 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 35 [2021-03-11 00:11:33,680 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:33,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:33,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:33,751 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-03-11 00:11:33,751 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 26 [2021-03-11 00:11:33,756 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:33,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:33,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:33,804 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:11:33,804 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-03-11 00:11:33,806 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:33,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:33,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:33,884 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-03-11 00:11:33,884 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 25 [2021-03-11 00:11:33,888 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:33,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:33,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:33,978 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-03-11 00:11:33,978 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2021-03-11 00:11:33,991 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:34,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:34,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:34,068 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-03-11 00:11:34,069 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 26 [2021-03-11 00:11:34,074 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:34,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:34,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:34,151 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:34,151 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-03-11 00:11:34,174 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:34,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:34,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:34,260 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-03-11 00:11:34,260 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-03-11 00:11:34,273 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:34,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:34,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:34,348 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-03-11 00:11:34,348 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 25 [2021-03-11 00:11:34,353 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:34,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:34,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:34,403 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:11:34,403 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 1 [2021-03-11 00:11:34,405 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:34,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:34,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:34,470 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:11:34,470 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 1 [2021-03-11 00:11:34,473 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:34,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:34,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:34,539 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:11:34,540 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 1 [2021-03-11 00:11:34,544 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:34,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:34,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:34,603 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:11:34,604 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 1 [2021-03-11 00:11:34,607 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:34,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:34,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:11:34,644 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:11:34,644 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-03-11 00:11:34,646 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:34,991 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 26 [2021-03-11 00:11:34,992 INFO L628 ElimStorePlain]: treesize reduction 138, result has 43.9 percent of original size [2021-03-11 00:11:34,995 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:11:34,995 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:761, output treesize:90 [2021-03-11 00:11:35,153 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-03-11 00:11:35,282 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:35,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:11:35,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-03-11 00:11:35,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18625690] [2021-03-11 00:11:35,282 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:11:35,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:35,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:11:35,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:11:35,283 INFO L87 Difference]: Start difference. First operand 1843 states and 6271 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:36,017 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 36 [2021-03-11 00:11:36,313 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2021-03-11 00:11:36,463 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-11 00:11:36,777 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 36 [2021-03-11 00:11:36,955 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-11 00:11:37,366 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 40 [2021-03-11 00:11:37,720 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 44 [2021-03-11 00:11:38,103 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 37 [2021-03-11 00:11:38,384 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2021-03-11 00:11:39,266 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2021-03-11 00:11:39,643 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 44 [2021-03-11 00:11:40,159 WARN L205 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2021-03-11 00:11:40,536 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2021-03-11 00:11:40,817 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-11 00:11:41,666 WARN L205 SmtUtils]: Spent 518.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2021-03-11 00:11:42,022 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2021-03-11 00:11:42,433 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 57 [2021-03-11 00:11:42,643 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-03-11 00:11:43,170 WARN L205 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2021-03-11 00:11:43,640 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-03-11 00:11:44,029 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-03-11 00:11:44,553 WARN L205 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 38 [2021-03-11 00:11:44,876 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 25 [2021-03-11 00:11:45,422 WARN L205 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 41 [2021-03-11 00:11:45,809 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 38 [2021-03-11 00:11:45,972 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-03-11 00:11:46,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:46,310 INFO L93 Difference]: Finished difference Result 3849 states and 12222 transitions. [2021-03-11 00:11:46,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-11 00:11:46,312 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:11:46,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:46,320 INFO L225 Difference]: With dead ends: 3849 [2021-03-11 00:11:46,320 INFO L226 Difference]: Without dead ends: 3792 [2021-03-11 00:11:46,321 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 11388.6ms TimeCoverageRelationStatistics Valid=649, Invalid=2657, Unknown=0, NotChecked=0, Total=3306 [2021-03-11 00:11:46,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3792 states. [2021-03-11 00:11:46,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3792 to 1871. [2021-03-11 00:11:46,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1871 states, 1870 states have (on average 3.4085561497326204) internal successors, (6374), 1870 states have internal predecessors, (6374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:46,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 6374 transitions. [2021-03-11 00:11:46,369 INFO L78 Accepts]: Start accepts. Automaton has 1871 states and 6374 transitions. Word has length 26 [2021-03-11 00:11:46,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:46,370 INFO L480 AbstractCegarLoop]: Abstraction has 1871 states and 6374 transitions. [2021-03-11 00:11:46,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:46,370 INFO L276 IsEmpty]: Start isEmpty. Operand 1871 states and 6374 transitions. [2021-03-11 00:11:46,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:11:46,373 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:46,373 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:11:46,573 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1745,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:46,573 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:46,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:46,574 INFO L82 PathProgramCache]: Analyzing trace with hash 2079051698, now seen corresponding path program 27 times [2021-03-11 00:11:46,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:46,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936668101] [2021-03-11 00:11:46,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:46,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:47,223 WARN L205 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 49 [2021-03-11 00:11:47,775 WARN L205 SmtUtils]: Spent 527.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2021-03-11 00:11:48,258 WARN L205 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2021-03-11 00:11:48,479 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2021-03-11 00:11:48,693 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2021-03-11 00:11:48,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:48,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936668101] [2021-03-11 00:11:48,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813198725] [2021-03-11 00:11:48,796 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 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 [2021-03-11 00:11:48,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:11:48,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:11:48,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:11:48,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:11:49,390 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-11 00:11:50,094 WARN L205 SmtUtils]: Spent 488.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-03-11 00:11:50,835 WARN L205 SmtUtils]: Spent 567.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-03-11 00:11:51,212 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:51,212 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-03-11 00:11:51,220 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:51,673 WARN L205 SmtUtils]: Spent 452.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-03-11 00:11:51,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:51,745 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:11:51,746 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-03-11 00:11:51,750 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:52,195 WARN L205 SmtUtils]: Spent 444.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-03-11 00:11:52,196 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:52,258 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:11:52,258 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-03-11 00:11:52,269 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:52,727 WARN L205 SmtUtils]: Spent 456.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2021-03-11 00:11:52,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:52,777 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:52,778 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-03-11 00:11:52,782 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:53,223 WARN L205 SmtUtils]: Spent 440.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2021-03-11 00:11:53,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:53,272 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:53,273 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-03-11 00:11:53,304 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:53,712 WARN L205 SmtUtils]: Spent 408.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-03-11 00:11:53,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:53,775 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:11:53,776 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-03-11 00:11:53,789 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:54,196 WARN L205 SmtUtils]: Spent 406.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-03-11 00:11:54,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:54,252 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:11:54,253 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-03-11 00:11:54,257 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:54,670 WARN L205 SmtUtils]: Spent 412.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-03-11 00:11:54,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:54,727 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:11:54,727 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-03-11 00:11:54,732 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:11:55,153 WARN L205 SmtUtils]: Spent 420.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-03-11 00:11:55,154 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:11:55,185 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:11:55,186 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:365, output treesize:376 [2021-03-11 00:11:56,211 WARN L205 SmtUtils]: Spent 946.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-03-11 00:11:56,517 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 20 [2021-03-11 00:11:56,564 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:56,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:11:56,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-03-11 00:11:56,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142367710] [2021-03-11 00:11:56,565 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:11:56,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:56,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:11:56,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:11:56,565 INFO L87 Difference]: Start difference. First operand 1871 states and 6374 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:56,777 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 25 [2021-03-11 00:11:57,033 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 33 [2021-03-11 00:11:57,263 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 33 [2021-03-11 00:11:57,581 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 34 [2021-03-11 00:11:58,004 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 45 [2021-03-11 00:11:58,283 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-03-11 00:11:58,920 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 46 [2021-03-11 00:11:59,183 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-03-11 00:11:59,897 WARN L205 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2021-03-11 00:12:00,099 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-11 00:12:00,781 WARN L205 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-03-11 00:12:01,801 WARN L205 SmtUtils]: Spent 816.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2021-03-11 00:12:02,557 WARN L205 SmtUtils]: Spent 537.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-03-11 00:12:03,386 WARN L205 SmtUtils]: Spent 737.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2021-03-11 00:12:05,603 WARN L205 SmtUtils]: Spent 1.96 s on a formula simplification. DAG size of input: 97 DAG size of output: 84 [2021-03-11 00:12:06,891 WARN L205 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 120 DAG size of output: 111 [2021-03-11 00:12:08,657 WARN L205 SmtUtils]: Spent 1.64 s on a formula simplification. DAG size of input: 109 DAG size of output: 104 [2021-03-11 00:12:11,945 WARN L205 SmtUtils]: Spent 2.77 s on a formula simplification. DAG size of input: 123 DAG size of output: 109 [2021-03-11 00:12:14,091 WARN L205 SmtUtils]: Spent 1.93 s on a formula simplification. DAG size of input: 153 DAG size of output: 139 [2021-03-11 00:12:15,426 WARN L205 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 139 DAG size of output: 77 [2021-03-11 00:12:15,876 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-11 00:12:16,296 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-11 00:12:17,916 WARN L205 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 69 DAG size of output: 46 [2021-03-11 00:12:18,961 WARN L205 SmtUtils]: Spent 729.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 33 [2021-03-11 00:12:19,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:12:19,530 INFO L93 Difference]: Finished difference Result 2616 states and 8514 transitions. [2021-03-11 00:12:19,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-11 00:12:19,533 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:12:19,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:12:19,538 INFO L225 Difference]: With dead ends: 2616 [2021-03-11 00:12:19,538 INFO L226 Difference]: Without dead ends: 2571 [2021-03-11 00:12:19,538 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 24462.8ms TimeCoverageRelationStatistics Valid=312, Invalid=1758, Unknown=0, NotChecked=0, Total=2070 [2021-03-11 00:12:19,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2571 states. [2021-03-11 00:12:19,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2571 to 1887. [2021-03-11 00:12:19,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1887 states, 1886 states have (on average 3.4056203605514317) internal successors, (6423), 1886 states have internal predecessors, (6423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:19,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1887 states to 1887 states and 6423 transitions. [2021-03-11 00:12:19,575 INFO L78 Accepts]: Start accepts. Automaton has 1887 states and 6423 transitions. Word has length 26 [2021-03-11 00:12:19,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:12:19,575 INFO L480 AbstractCegarLoop]: Abstraction has 1887 states and 6423 transitions. [2021-03-11 00:12:19,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:19,575 INFO L276 IsEmpty]: Start isEmpty. Operand 1887 states and 6423 transitions. [2021-03-11 00:12:19,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:12:19,579 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:12:19,579 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:12:19,779 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1846 [2021-03-11 00:12:19,779 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:12:19,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:12:19,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1795376066, now seen corresponding path program 28 times [2021-03-11 00:12:19,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:12:19,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135232197] [2021-03-11 00:12:19,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:12:19,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:20,353 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2021-03-11 00:12:20,699 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-03-11 00:12:20,944 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-03-11 00:12:21,151 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-03-11 00:12:21,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:21,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135232197] [2021-03-11 00:12:21,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980716772] [2021-03-11 00:12:21,378 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 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 [2021-03-11 00:12:21,399 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:12:21,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:12:21,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:12:21,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:12:22,048 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-11 00:12:22,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:22,150 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:12:22,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:12:22,153 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:22,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:22,182 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:12:22,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:12:22,185 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:22,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:22,230 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:12:22,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-03-11 00:12:22,235 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:22,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:22,282 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:12:22,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-03-11 00:12:22,286 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:22,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:22,329 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:12:22,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-03-11 00:12:22,344 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:22,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:22,377 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:12:22,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-03-11 00:12:22,380 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:22,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:22,426 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:12:22,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-03-11 00:12:22,436 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:22,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:22,467 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:12:22,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:12:22,470 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:22,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:22,512 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:12:22,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-03-11 00:12:22,525 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:22,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:22,554 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:12:22,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-03-11 00:12:22,557 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:22,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:22,588 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:12:22,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-03-11 00:12:22,590 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:22,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:22,630 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:12:22,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-03-11 00:12:22,636 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:22,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:22,675 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:12:22,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-03-11 00:12:22,680 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:22,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:22,707 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:12:22,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-03-11 00:12:22,729 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:22,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:22,765 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:12:22,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-03-11 00:12:22,771 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:22,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:22,787 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:12:22,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:12:22,789 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:22,967 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-11 00:12:22,967 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:12:22,969 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:12:22,969 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:737, output treesize:229 [2021-03-11 00:12:23,231 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-11 00:12:23,673 WARN L205 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2021-03-11 00:12:23,868 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2021-03-11 00:12:23,925 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:23,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:12:23,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-03-11 00:12:23,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574360732] [2021-03-11 00:12:23,926 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:12:23,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:12:23,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:12:23,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:12:23,927 INFO L87 Difference]: Start difference. First operand 1887 states and 6423 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:24,287 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 29 [2021-03-11 00:12:24,662 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-03-11 00:12:24,844 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-03-11 00:12:25,098 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 35 [2021-03-11 00:12:25,321 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-03-11 00:12:25,758 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 39 [2021-03-11 00:12:26,259 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-03-11 00:12:26,415 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-11 00:12:27,104 WARN L205 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-03-11 00:12:27,708 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-03-11 00:12:29,091 WARN L205 SmtUtils]: Spent 682.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 47 [2021-03-11 00:12:29,917 WARN L205 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2021-03-11 00:12:30,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:12:30,463 INFO L93 Difference]: Finished difference Result 2525 states and 8371 transitions. [2021-03-11 00:12:30,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-11 00:12:30,466 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:12:30,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:12:30,471 INFO L225 Difference]: With dead ends: 2525 [2021-03-11 00:12:30,472 INFO L226 Difference]: Without dead ends: 2479 [2021-03-11 00:12:30,472 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 7027.5ms TimeCoverageRelationStatistics Valid=240, Invalid=950, Unknown=0, NotChecked=0, Total=1190 [2021-03-11 00:12:30,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2479 states. [2021-03-11 00:12:30,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2479 to 1905. [2021-03-11 00:12:30,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1905 states, 1904 states have (on average 3.409138655462185) internal successors, (6491), 1904 states have internal predecessors, (6491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:30,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1905 states to 1905 states and 6491 transitions. [2021-03-11 00:12:30,509 INFO L78 Accepts]: Start accepts. Automaton has 1905 states and 6491 transitions. Word has length 26 [2021-03-11 00:12:30,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:12:30,509 INFO L480 AbstractCegarLoop]: Abstraction has 1905 states and 6491 transitions. [2021-03-11 00:12:30,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:30,509 INFO L276 IsEmpty]: Start isEmpty. Operand 1905 states and 6491 transitions. [2021-03-11 00:12:30,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:12:30,513 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:12:30,513 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:12:30,713 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1874,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:30,713 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:12:30,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:12:30,714 INFO L82 PathProgramCache]: Analyzing trace with hash 2031976096, now seen corresponding path program 29 times [2021-03-11 00:12:30,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:12:30,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216464293] [2021-03-11 00:12:30,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:12:30,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:31,333 WARN L205 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-03-11 00:12:31,704 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-03-11 00:12:32,049 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-03-11 00:12:32,312 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-03-11 00:12:32,518 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 17 [2021-03-11 00:12:32,725 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 13 [2021-03-11 00:12:32,727 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:32,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216464293] [2021-03-11 00:12:32,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707321547] [2021-03-11 00:12:32,727 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 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 [2021-03-11 00:12:32,750 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-11 00:12:32,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:12:32,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:12:32,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:12:33,444 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-11 00:12:33,958 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-03-11 00:12:34,795 WARN L205 SmtUtils]: Spent 661.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-03-11 00:12:34,947 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_208, v_prenex_209, v_prenex_214], 3=[v_prenex_217, A, v_prenex_210, v_prenex_213, v_prenex_216]} [2021-03-11 00:12:34,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:35,005 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:12:35,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-03-11 00:12:35,010 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:35,537 WARN L205 SmtUtils]: Spent 526.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2021-03-11 00:12:35,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:12:35,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:35,577 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:12:35,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-03-11 00:12:35,583 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:36,109 WARN L205 SmtUtils]: Spent 525.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2021-03-11 00:12:36,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:12:36,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:36,154 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:12:36,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-03-11 00:12:36,163 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:36,664 WARN L205 SmtUtils]: Spent 501.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-03-11 00:12:36,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:12:36,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:36,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:36,710 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-03-11 00:12:36,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 22 [2021-03-11 00:12:36,715 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:37,220 WARN L205 SmtUtils]: Spent 503.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2021-03-11 00:12:37,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:12:37,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:37,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:37,265 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-03-11 00:12:37,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 19 [2021-03-11 00:12:37,272 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:37,760 WARN L205 SmtUtils]: Spent 488.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-03-11 00:12:37,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:12:37,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:37,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:37,805 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-03-11 00:12:37,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2021-03-11 00:12:37,812 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:38,297 WARN L205 SmtUtils]: Spent 485.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-03-11 00:12:38,299 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:12:38,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:38,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:38,332 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:12:38,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-03-11 00:12:38,347 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:38,798 WARN L205 SmtUtils]: Spent 450.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-03-11 00:12:38,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:12:38,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:38,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:12:38,841 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:12:38,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-03-11 00:12:38,854 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:12:39,280 WARN L205 SmtUtils]: Spent 425.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-03-11 00:12:39,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:12:39,304 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:12:39,305 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:383, output treesize:212 [2021-03-11 00:12:40,091 WARN L205 SmtUtils]: Spent 685.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-03-11 00:12:40,417 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 21 [2021-03-11 00:12:40,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:40,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:12:40,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-11 00:12:40,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293142330] [2021-03-11 00:12:40,495 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:12:40,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:12:40,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:12:40,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:12:40,496 INFO L87 Difference]: Start difference. First operand 1905 states and 6491 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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) [2021-03-11 00:12:40,736 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 25 [2021-03-11 00:12:41,127 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 28 [2021-03-11 00:12:41,455 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2021-03-11 00:12:42,284 WARN L205 SmtUtils]: Spent 668.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2021-03-11 00:12:42,550 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 36 [2021-03-11 00:12:43,159 WARN L205 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 45 [2021-03-11 00:12:43,458 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-03-11 00:12:44,255 WARN L205 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 43 [2021-03-11 00:12:44,828 WARN L205 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 43 [2021-03-11 00:12:45,024 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-11 00:12:45,755 WARN L205 SmtUtils]: Spent 614.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2021-03-11 00:12:45,952 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-03-11 00:12:46,354 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-03-11 00:12:48,173 WARN L205 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 78 DAG size of output: 53 [2021-03-11 00:12:49,715 WARN L205 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 76 DAG size of output: 52 [2021-03-11 00:12:50,773 WARN L205 SmtUtils]: Spent 846.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2021-03-11 00:12:51,973 WARN L205 SmtUtils]: Spent 758.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-03-11 00:12:53,974 WARN L205 SmtUtils]: Spent 1.63 s on a formula simplification. DAG size of input: 86 DAG size of output: 79 [2021-03-11 00:12:54,555 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-03-11 00:12:55,776 WARN L205 SmtUtils]: Spent 850.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2021-03-11 00:12:56,196 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 32 [2021-03-11 00:12:56,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:12:56,410 INFO L93 Difference]: Finished difference Result 2754 states and 9026 transitions. [2021-03-11 00:12:56,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-11 00:12:56,413 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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) Word has length 26 [2021-03-11 00:12:56,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:12:56,419 INFO L225 Difference]: With dead ends: 2754 [2021-03-11 00:12:56,419 INFO L226 Difference]: Without dead ends: 2720 [2021-03-11 00:12:56,419 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 17689.7ms TimeCoverageRelationStatistics Valid=328, Invalid=1478, Unknown=0, NotChecked=0, Total=1806 [2021-03-11 00:12:56,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2720 states. [2021-03-11 00:12:56,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2720 to 1898. [2021-03-11 00:12:56,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1898 states, 1897 states have (on average 3.4059040590405902) internal successors, (6461), 1897 states have internal predecessors, (6461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:56,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1898 states to 1898 states and 6461 transitions. [2021-03-11 00:12:56,459 INFO L78 Accepts]: Start accepts. Automaton has 1898 states and 6461 transitions. Word has length 26 [2021-03-11 00:12:56,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:12:56,459 INFO L480 AbstractCegarLoop]: Abstraction has 1898 states and 6461 transitions. [2021-03-11 00:12:56,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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) [2021-03-11 00:12:56,459 INFO L276 IsEmpty]: Start isEmpty. Operand 1898 states and 6461 transitions. [2021-03-11 00:12:56,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:12:56,463 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:12:56,463 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:12:56,663 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1890,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:56,664 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:12:56,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:12:56,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1102392532, now seen corresponding path program 48 times [2021-03-11 00:12:56,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:12:56,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659068315] [2021-03-11 00:12:56,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:12:56,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:57,180 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2021-03-11 00:12:57,477 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2021-03-11 00:12:57,738 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 34 [2021-03-11 00:12:57,954 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 27 [2021-03-11 00:12:58,175 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 29 [2021-03-11 00:12:58,344 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 21 [2021-03-11 00:12:58,500 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2021-03-11 00:12:58,504 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:58,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659068315] [2021-03-11 00:12:58,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388644157] [2021-03-11 00:12:58,504 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 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 [2021-03-11 00:12:58,527 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-11 00:12:58,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:12:58,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:12:58,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:12:59,397 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-03-11 00:13:00,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:00,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:00,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:00,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:00,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:00,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:00,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2021-03-11 00:13:00,562 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:00,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:00,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:00,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:00,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:00,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:00,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:00,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-03-11 00:13:00,604 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:00,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:00,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:00,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:00,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:00,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:00,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:00,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-03-11 00:13:00,645 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:00,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:00,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:00,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:00,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:00,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:00,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:00,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 16 [2021-03-11 00:13:00,677 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:00,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:00,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:00,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:00,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:00,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:00,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:00,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2021-03-11 00:13:00,711 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:00,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:00,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:00,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:00,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:00,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:00,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:00,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2021-03-11 00:13:00,762 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:00,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:00,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:00,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:00,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:00,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:00,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:00,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2021-03-11 00:13:00,797 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:00,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:00,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:00,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:00,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:00,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:00,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:00,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2021-03-11 00:13:00,836 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:00,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:00,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:00,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:00,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:00,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:00,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:00,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 13 [2021-03-11 00:13:00,878 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:00,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:00,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:00,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:00,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:00,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:00,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:00,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 13 [2021-03-11 00:13:00,918 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:00,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:00,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:00,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:00,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:00,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:00,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:00,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 16 [2021-03-11 00:13:00,955 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:00,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:00,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:00,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:00,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:00,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:00,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:00,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 13 [2021-03-11 00:13:00,992 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:01,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:01,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:01,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:01,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:01,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:01,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:01,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 16 [2021-03-11 00:13:01,033 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:01,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:01,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:01,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:01,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:01,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:01,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:01,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 19 [2021-03-11 00:13:01,074 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:01,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:01,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:01,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:01,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:01,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:01,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:01,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2021-03-11 00:13:01,117 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:01,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:01,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:01,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:01,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:01,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 19 [2021-03-11 00:13:01,140 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:01,282 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2021-03-11 00:13:01,284 INFO L628 ElimStorePlain]: treesize reduction 38, result has 49.3 percent of original size [2021-03-11 00:13:01,286 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-11 00:13:01,287 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:27 [2021-03-11 00:13:01,426 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:13:01,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:13:01,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-03-11 00:13:01,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117322157] [2021-03-11 00:13:01,426 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:13:01,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:13:01,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:13:01,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:13:01,427 INFO L87 Difference]: Start difference. First operand 1898 states and 6461 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:01,967 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 27 [2021-03-11 00:13:02,237 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 30 [2021-03-11 00:13:02,485 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 32 [2021-03-11 00:13:02,854 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 38 [2021-03-11 00:13:03,250 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 31 [2021-03-11 00:13:03,662 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 41 [2021-03-11 00:13:04,036 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 40 [2021-03-11 00:13:04,559 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 33 [2021-03-11 00:13:04,970 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 40 [2021-03-11 00:13:05,333 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 35 [2021-03-11 00:13:05,643 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 41 [2021-03-11 00:13:06,020 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-03-11 00:13:06,533 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 42 [2021-03-11 00:13:06,911 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 46 [2021-03-11 00:13:07,232 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 33 [2021-03-11 00:13:07,912 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-11 00:13:08,514 WARN L205 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-03-11 00:13:08,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:13:08,899 INFO L93 Difference]: Finished difference Result 2380 states and 7875 transitions. [2021-03-11 00:13:08,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:13:08,903 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:13:08,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:13:08,908 INFO L225 Difference]: With dead ends: 2380 [2021-03-11 00:13:08,908 INFO L226 Difference]: Without dead ends: 2358 [2021-03-11 00:13:08,908 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 8157.7ms TimeCoverageRelationStatistics Valid=290, Invalid=1270, Unknown=0, NotChecked=0, Total=1560 [2021-03-11 00:13:08,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2358 states. [2021-03-11 00:13:08,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2358 to 1890. [2021-03-11 00:13:08,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1890 states, 1889 states have (on average 3.4033880359978825) internal successors, (6429), 1889 states have internal predecessors, (6429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:08,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1890 states to 1890 states and 6429 transitions. [2021-03-11 00:13:08,944 INFO L78 Accepts]: Start accepts. Automaton has 1890 states and 6429 transitions. Word has length 26 [2021-03-11 00:13:08,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:13:08,944 INFO L480 AbstractCegarLoop]: Abstraction has 1890 states and 6429 transitions. [2021-03-11 00:13:08,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:08,944 INFO L276 IsEmpty]: Start isEmpty. Operand 1890 states and 6429 transitions. [2021-03-11 00:13:08,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:13:08,948 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:13:08,948 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:13:09,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1907 [2021-03-11 00:13:09,149 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:13:09,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:13:09,149 INFO L82 PathProgramCache]: Analyzing trace with hash 2027886398, now seen corresponding path program 49 times [2021-03-11 00:13:09,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:13:09,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099710988] [2021-03-11 00:13:09,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:13:09,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:13:09,728 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 36 [2021-03-11 00:13:10,070 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2021-03-11 00:13:10,357 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 32 [2021-03-11 00:13:10,602 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 25 [2021-03-11 00:13:10,822 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2021-03-11 00:13:11,025 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:13:11,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099710988] [2021-03-11 00:13:11,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594680757] [2021-03-11 00:13:11,026 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 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 [2021-03-11 00:13:11,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:13:11,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-11 00:13:11,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:13:12,254 WARN L205 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2021-03-11 00:13:12,464 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_221], 6=[v_prenex_219, v_prenex_223]} [2021-03-11 00:13:12,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:12,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:12,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:12,485 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 29 treesize of output 13 [2021-03-11 00:13:12,489 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:12,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:12,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:12,505 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 13 [2021-03-11 00:13:12,510 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:12,937 WARN L205 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2021-03-11 00:13:12,938 INFO L628 ElimStorePlain]: treesize reduction 170, result has 42.4 percent of original size [2021-03-11 00:13:12,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:12,950 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 15 treesize of output 7 [2021-03-11 00:13:12,957 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:13,126 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-03-11 00:13:13,128 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:13:13,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:13,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:13,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:13,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:13,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2021-03-11 00:13:13,163 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:13,331 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-11 00:13:13,333 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:13:13,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:13,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:13,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:13:13,350 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 29 treesize of output 13 [2021-03-11 00:13:13,354 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:13,498 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-03-11 00:13:13,499 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:13:13,509 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-11 00:13:13,509 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:365, output treesize:43 [2021-03-11 00:13:13,755 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:13:13,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:13:13,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-03-11 00:13:13,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698797177] [2021-03-11 00:13:13,756 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:13:13,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:13:13,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:13:13,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:13:13,757 INFO L87 Difference]: Start difference. First operand 1890 states and 6429 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:13,993 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 20 [2021-03-11 00:13:14,140 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 20 [2021-03-11 00:13:14,325 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 24 [2021-03-11 00:13:14,473 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 23 [2021-03-11 00:13:14,743 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 27 [2021-03-11 00:13:14,972 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 30 [2021-03-11 00:13:15,215 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 31 [2021-03-11 00:13:15,518 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 28 [2021-03-11 00:13:15,765 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 26 [2021-03-11 00:13:16,105 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2021-03-11 00:13:16,402 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 35 [2021-03-11 00:13:16,753 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2021-03-11 00:13:17,448 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 32 [2021-03-11 00:13:17,870 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 35 [2021-03-11 00:13:18,295 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 37 [2021-03-11 00:13:18,617 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 34 [2021-03-11 00:13:19,169 WARN L205 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-03-11 00:13:19,625 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2021-03-11 00:13:20,107 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2021-03-11 00:13:20,663 WARN L205 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 42 [2021-03-11 00:13:21,346 WARN L205 SmtUtils]: Spent 498.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-03-11 00:13:22,014 WARN L205 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 43 [2021-03-11 00:13:22,752 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-11 00:13:23,514 WARN L205 SmtUtils]: Spent 662.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2021-03-11 00:13:24,014 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 25 [2021-03-11 00:13:24,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:13:24,138 INFO L93 Difference]: Finished difference Result 2577 states and 8513 transitions. [2021-03-11 00:13:24,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-11 00:13:24,141 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:13:24,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:13:24,146 INFO L225 Difference]: With dead ends: 2577 [2021-03-11 00:13:24,147 INFO L226 Difference]: Without dead ends: 2562 [2021-03-11 00:13:24,147 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 720 ImplicationChecksByTransitivity, 10662.4ms TimeCoverageRelationStatistics Valid=476, Invalid=1876, Unknown=0, NotChecked=0, Total=2352 [2021-03-11 00:13:24,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2562 states. [2021-03-11 00:13:24,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2562 to 1890. [2021-03-11 00:13:24,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1890 states, 1889 states have (on average 3.4033880359978825) internal successors, (6429), 1889 states have internal predecessors, (6429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:24,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1890 states to 1890 states and 6429 transitions. [2021-03-11 00:13:24,185 INFO L78 Accepts]: Start accepts. Automaton has 1890 states and 6429 transitions. Word has length 26 [2021-03-11 00:13:24,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:13:24,185 INFO L480 AbstractCegarLoop]: Abstraction has 1890 states and 6429 transitions. [2021-03-11 00:13:24,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:24,185 INFO L276 IsEmpty]: Start isEmpty. Operand 1890 states and 6429 transitions. [2021-03-11 00:13:24,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:13:24,189 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:13:24,189 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:13:24,389 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2013 [2021-03-11 00:13:24,390 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:13:24,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:13:24,390 INFO L82 PathProgramCache]: Analyzing trace with hash 849981858, now seen corresponding path program 50 times [2021-03-11 00:13:24,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:13:24,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028119263] [2021-03-11 00:13:24,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:13:24,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:13:24,821 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-03-11 00:13:25,047 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-03-11 00:13:25,318 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 21 [2021-03-11 00:13:25,655 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 27 [2021-03-11 00:13:25,932 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-03-11 00:13:26,203 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-03-11 00:13:26,461 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:13:26,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028119263] [2021-03-11 00:13:26,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754269267] [2021-03-11 00:13:26,461 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 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 [2021-03-11 00:13:26,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:13:26,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:13:26,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-11 00:13:26,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:13:27,146 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-11 00:13:27,403 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-11 00:13:28,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:28,948 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2021-03-11 00:13:28,949 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-03-11 00:13:28,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 52 [2021-03-11 00:13:28,996 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:29,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:29,176 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 16 [2021-03-11 00:13:29,178 INFO L354 Elim1Store]: treesize reduction 20, result has 55.6 percent of original size [2021-03-11 00:13:29,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 40 [2021-03-11 00:13:29,186 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:29,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:29,417 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-03-11 00:13:29,419 INFO L354 Elim1Store]: treesize reduction 12, result has 73.3 percent of original size [2021-03-11 00:13:29,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 51 [2021-03-11 00:13:29,431 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:29,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:29,688 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-03-11 00:13:29,689 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-03-11 00:13:29,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 55 [2021-03-11 00:13:29,710 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:29,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:29,910 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 20 [2021-03-11 00:13:29,912 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-03-11 00:13:29,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 47 [2021-03-11 00:13:29,922 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:29,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:30,128 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2021-03-11 00:13:30,129 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-03-11 00:13:30,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 44 [2021-03-11 00:13:30,159 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:30,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:30,395 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-03-11 00:13:30,396 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-03-11 00:13:30,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 52 [2021-03-11 00:13:30,442 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:30,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:30,661 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-03-11 00:13:30,662 INFO L354 Elim1Store]: treesize reduction 12, result has 73.3 percent of original size [2021-03-11 00:13:30,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 51 [2021-03-11 00:13:30,678 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:30,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:30,846 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:13:30,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 57 [2021-03-11 00:13:30,902 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:30,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:31,163 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-03-11 00:13:31,164 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-03-11 00:13:31,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 55 [2021-03-11 00:13:31,186 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:31,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:31,374 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-03-11 00:13:31,376 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:13:31,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 63 [2021-03-11 00:13:31,425 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:31,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:31,669 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2021-03-11 00:13:31,670 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-03-11 00:13:31,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 44 [2021-03-11 00:13:31,699 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:31,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:31,782 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-03-11 00:13:31,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 1 [2021-03-11 00:13:31,787 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:31,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:31,886 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-03-11 00:13:31,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 1 [2021-03-11 00:13:31,891 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:31,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:32,079 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 15 [2021-03-11 00:13:32,081 INFO L354 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2021-03-11 00:13:32,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 37 [2021-03-11 00:13:32,087 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:32,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:13:32,141 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-03-11 00:13:32,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 32 treesize of output 1 [2021-03-11 00:13:32,145 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:13:35,565 WARN L205 SmtUtils]: Spent 3.42 s on a formula simplification. DAG size of input: 79 DAG size of output: 46 [2021-03-11 00:13:35,566 INFO L628 ElimStorePlain]: treesize reduction 385, result has 48.4 percent of original size [2021-03-11 00:13:35,576 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-03-11 00:13:35,577 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:945, output treesize:402 [2021-03-11 00:13:36,848 WARN L205 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2021-03-11 00:13:37,172 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-03-11 00:13:37,352 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:13:37,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:13:37,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-03-11 00:13:37,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692982328] [2021-03-11 00:13:37,353 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-11 00:13:37,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:13:37,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-11 00:13:37,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-03-11 00:13:37,353 INFO L87 Difference]: Start difference. First operand 1890 states and 6429 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:37,622 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 24 [2021-03-11 00:13:37,800 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 24 [2021-03-11 00:13:38,108 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 29 [2021-03-11 00:13:38,574 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2021-03-11 00:13:38,981 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2021-03-11 00:13:39,289 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 27 [2021-03-11 00:13:39,493 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-11 00:13:40,145 WARN L205 SmtUtils]: Spent 529.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 37 [2021-03-11 00:13:41,002 WARN L205 SmtUtils]: Spent 747.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 48 [2021-03-11 00:13:41,444 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2021-03-11 00:13:42,100 WARN L205 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2021-03-11 00:13:42,394 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 41 [2021-03-11 00:13:43,733 WARN L205 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2021-03-11 00:13:44,047 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2021-03-11 00:13:44,498 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-03-11 00:13:44,929 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2021-03-11 00:13:46,094 WARN L205 SmtUtils]: Spent 892.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2021-03-11 00:13:47,264 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2021-03-11 00:13:47,513 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-03-11 00:13:49,013 WARN L205 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2021-03-11 00:13:49,576 WARN L205 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2021-03-11 00:13:50,072 WARN L205 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2021-03-11 00:13:50,633 WARN L205 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-03-11 00:13:51,295 WARN L205 SmtUtils]: Spent 596.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2021-03-11 00:13:51,978 WARN L205 SmtUtils]: Spent 601.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2021-03-11 00:13:52,589 WARN L205 SmtUtils]: Spent 528.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-03-11 00:13:53,159 WARN L205 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-03-11 00:13:53,777 WARN L205 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-03-11 00:13:55,064 WARN L205 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 71 DAG size of output: 49 [2021-03-11 00:13:56,344 WARN L205 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2021-03-11 00:13:57,385 WARN L205 SmtUtils]: Spent 687.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 47 [2021-03-11 00:13:58,228 WARN L205 SmtUtils]: Spent 687.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 48 [2021-03-11 00:13:59,000 WARN L205 SmtUtils]: Spent 695.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 53 [2021-03-11 00:13:59,615 WARN L205 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2021-03-11 00:14:00,275 WARN L205 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-03-11 00:14:01,392 WARN L205 SmtUtils]: Spent 763.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2021-03-11 00:14:02,692 WARN L205 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2021-03-11 00:14:03,020 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-03-11 00:14:03,392 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2021-03-11 00:14:03,685 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-03-11 00:14:03,928 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2021-03-11 00:14:04,710 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2021-03-11 00:14:05,168 WARN L205 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2021-03-11 00:14:05,767 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 26 [2021-03-11 00:14:06,021 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 26 [2021-03-11 00:14:06,353 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 35 [2021-03-11 00:14:06,670 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 35 [2021-03-11 00:14:06,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:06,803 INFO L93 Difference]: Finished difference Result 3267 states and 10417 transitions. [2021-03-11 00:14:06,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-03-11 00:14:06,805 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:14:06,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:06,809 INFO L225 Difference]: With dead ends: 3267 [2021-03-11 00:14:06,809 INFO L226 Difference]: Without dead ends: 3226 [2021-03-11 00:14:06,810 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1657 ImplicationChecksByTransitivity, 30099.8ms TimeCoverageRelationStatistics Valid=871, Invalid=4531, Unknown=0, NotChecked=0, Total=5402 [2021-03-11 00:14:06,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3226 states. [2021-03-11 00:14:06,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3226 to 1912. [2021-03-11 00:14:06,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1912 states, 1911 states have (on average 3.3966509680795394) internal successors, (6491), 1911 states have internal predecessors, (6491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:06,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1912 states to 1912 states and 6491 transitions. [2021-03-11 00:14:06,839 INFO L78 Accepts]: Start accepts. Automaton has 1912 states and 6491 transitions. Word has length 26 [2021-03-11 00:14:06,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:06,839 INFO L480 AbstractCegarLoop]: Abstraction has 1912 states and 6491 transitions. [2021-03-11 00:14:06,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:06,839 INFO L276 IsEmpty]: Start isEmpty. Operand 1912 states and 6491 transitions. [2021-03-11 00:14:06,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:14:06,841 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:06,841 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:14:07,043 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2027,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:07,043 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:07,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:07,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1044384706, now seen corresponding path program 51 times [2021-03-11 00:14:07,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:07,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125204434] [2021-03-11 00:14:07,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:07,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:07,426 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 31 [2021-03-11 00:14:07,624 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 34 [2021-03-11 00:14:07,982 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-03-11 00:14:08,322 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:08,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125204434] [2021-03-11 00:14:08,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923469911] [2021-03-11 00:14:08,322 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 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 [2021-03-11 00:14:08,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-11 00:14:08,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:14:08,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:14:08,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:09,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:09,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:09,590 INFO L354 Elim1Store]: treesize reduction 14, result has 65.9 percent of original size [2021-03-11 00:14:09,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 45 [2021-03-11 00:14:09,600 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:09,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:09,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:09,674 INFO L354 Elim1Store]: treesize reduction 31, result has 24.4 percent of original size [2021-03-11 00:14:09,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 28 [2021-03-11 00:14:09,676 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:09,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:09,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:09,744 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-03-11 00:14:09,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 25 [2021-03-11 00:14:09,747 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:09,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:09,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:09,837 INFO L354 Elim1Store]: treesize reduction 18, result has 56.1 percent of original size [2021-03-11 00:14:09,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 38 [2021-03-11 00:14:09,848 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:09,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:09,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:09,925 INFO L354 Elim1Store]: treesize reduction 31, result has 24.4 percent of original size [2021-03-11 00:14:09,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 30 treesize of output 25 [2021-03-11 00:14:09,929 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:09,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:09,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:10,001 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-03-11 00:14:10,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 25 [2021-03-11 00:14:10,005 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:10,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:10,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:10,089 INFO L354 Elim1Store]: treesize reduction 18, result has 56.1 percent of original size [2021-03-11 00:14:10,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 38 [2021-03-11 00:14:10,099 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:10,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:10,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:10,146 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-03-11 00:14:10,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 1 [2021-03-11 00:14:10,148 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:10,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:10,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:10,191 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-03-11 00:14:10,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 1 [2021-03-11 00:14:10,194 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:10,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:10,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:10,237 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-03-11 00:14:10,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 1 [2021-03-11 00:14:10,239 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:10,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:10,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:10,283 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-03-11 00:14:10,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 1 [2021-03-11 00:14:10,285 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:10,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:10,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:10,328 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-03-11 00:14:10,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 1 [2021-03-11 00:14:10,330 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:10,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:10,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:10,371 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-03-11 00:14:10,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 1 [2021-03-11 00:14:10,373 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:10,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:10,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:10,448 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:14:10,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 53 [2021-03-11 00:14:10,481 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:10,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:10,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:10,529 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-03-11 00:14:10,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 1 [2021-03-11 00:14:10,531 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:10,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:10,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:10,577 INFO L354 Elim1Store]: treesize reduction 31, result has 24.4 percent of original size [2021-03-11 00:14:10,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 25 [2021-03-11 00:14:10,580 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:10,888 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-03-11 00:14:10,889 INFO L628 ElimStorePlain]: treesize reduction 159, result has 50.0 percent of original size [2021-03-11 00:14:10,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:14:10,892 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:953, output treesize:180 [2021-03-11 00:14:11,091 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-11 00:14:11,383 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 27 [2021-03-11 00:14:11,503 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:11,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:11,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-03-11 00:14:11,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413393544] [2021-03-11 00:14:11,504 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-11 00:14:11,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:11,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-11 00:14:11,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-03-11 00:14:11,504 INFO L87 Difference]: Start difference. First operand 1912 states and 6491 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:11,974 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 28 [2021-03-11 00:14:12,360 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2021-03-11 00:14:12,743 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 35 [2021-03-11 00:14:13,016 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 35 [2021-03-11 00:14:13,445 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 40 [2021-03-11 00:14:13,697 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 41 [2021-03-11 00:14:13,965 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 33 [2021-03-11 00:14:14,354 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-03-11 00:14:15,009 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 43 [2021-03-11 00:14:15,448 WARN L205 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2021-03-11 00:14:15,896 WARN L205 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2021-03-11 00:14:16,256 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2021-03-11 00:14:16,540 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2021-03-11 00:14:16,835 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2021-03-11 00:14:17,269 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 44 [2021-03-11 00:14:17,441 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-03-11 00:14:17,709 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2021-03-11 00:14:18,205 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 38 [2021-03-11 00:14:18,441 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2021-03-11 00:14:18,828 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2021-03-11 00:14:19,060 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-11 00:14:19,528 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2021-03-11 00:14:19,956 WARN L205 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2021-03-11 00:14:20,514 WARN L205 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 32 [2021-03-11 00:14:20,888 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-03-11 00:14:21,156 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 29 [2021-03-11 00:14:21,899 WARN L205 SmtUtils]: Spent 681.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 46 [2021-03-11 00:14:22,363 WARN L205 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 46 [2021-03-11 00:14:22,687 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 34 [2021-03-11 00:14:22,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:22,949 INFO L93 Difference]: Finished difference Result 3131 states and 10142 transitions. [2021-03-11 00:14:22,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-03-11 00:14:22,951 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:14:22,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:22,956 INFO L225 Difference]: With dead ends: 3131 [2021-03-11 00:14:22,956 INFO L226 Difference]: Without dead ends: 3075 [2021-03-11 00:14:22,956 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1145 ImplicationChecksByTransitivity, 11951.3ms TimeCoverageRelationStatistics Valid=663, Invalid=3243, Unknown=0, NotChecked=0, Total=3906 [2021-03-11 00:14:22,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3075 states. [2021-03-11 00:14:22,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3075 to 1900. [2021-03-11 00:14:22,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1900 states, 1899 states have (on average 3.3933649289099526) internal successors, (6444), 1899 states have internal predecessors, (6444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:22,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1900 states to 1900 states and 6444 transitions. [2021-03-11 00:14:22,990 INFO L78 Accepts]: Start accepts. Automaton has 1900 states and 6444 transitions. Word has length 26 [2021-03-11 00:14:22,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:22,990 INFO L480 AbstractCegarLoop]: Abstraction has 1900 states and 6444 transitions. [2021-03-11 00:14:22,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:22,990 INFO L276 IsEmpty]: Start isEmpty. Operand 1900 states and 6444 transitions. [2021-03-11 00:14:22,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:14:22,993 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:22,993 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:14:23,193 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2193,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:23,193 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:23,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:23,194 INFO L82 PathProgramCache]: Analyzing trace with hash -696255298, now seen corresponding path program 52 times [2021-03-11 00:14:23,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:23,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990193497] [2021-03-11 00:14:23,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:23,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:23,502 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-03-11 00:14:23,675 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-03-11 00:14:23,942 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 27 [2021-03-11 00:14:24,094 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 29 [2021-03-11 00:14:24,274 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:24,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990193497] [2021-03-11 00:14:24,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855692788] [2021-03-11 00:14:24,275 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 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 [2021-03-11 00:14:24,296 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:14:24,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:14:24,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-11 00:14:24,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:25,126 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-03-11 00:14:25,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:25,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:25,750 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:14:25,751 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 47 [2021-03-11 00:14:25,763 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:25,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:25,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:25,826 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-03-11 00:14:25,826 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 35 [2021-03-11 00:14:25,835 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:27,399 WARN L205 SmtUtils]: Spent 1.56 s on a formula simplification. DAG size of input: 164 DAG size of output: 153 [2021-03-11 00:14:27,400 INFO L628 ElimStorePlain]: treesize reduction 40, result has 94.9 percent of original size [2021-03-11 00:14:27,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:27,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:27,474 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:14:27,474 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 47 [2021-03-11 00:14:27,486 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:27,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:27,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:27,517 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:14:27,517 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 1 [2021-03-11 00:14:27,519 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:28,269 WARN L205 SmtUtils]: Spent 749.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2021-03-11 00:14:28,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:14:28,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:28,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:28,346 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-03-11 00:14:28,347 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 35 [2021-03-11 00:14:28,350 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:28,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:28,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:28,404 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-03-11 00:14:28,404 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 28 [2021-03-11 00:14:28,408 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:29,080 WARN L205 SmtUtils]: Spent 671.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2021-03-11 00:14:29,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:14:29,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:29,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:29,158 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-03-11 00:14:29,158 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-03-11 00:14:29,169 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:29,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:29,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:29,199 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:14:29,199 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 1 [2021-03-11 00:14:29,201 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:29,805 WARN L205 SmtUtils]: Spent 603.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2021-03-11 00:14:29,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:14:29,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:29,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:29,890 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-03-11 00:14:29,890 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2021-03-11 00:14:29,901 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:29,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:29,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:29,992 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-03-11 00:14:29,992 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 43 [2021-03-11 00:14:30,002 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:30,676 WARN L205 SmtUtils]: Spent 673.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-03-11 00:14:30,677 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:14:30,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:30,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:30,766 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-03-11 00:14:30,766 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 35 [2021-03-11 00:14:30,773 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:30,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:30,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:30,837 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-03-11 00:14:30,837 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 28 [2021-03-11 00:14:30,841 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:31,429 WARN L205 SmtUtils]: Spent 587.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-03-11 00:14:31,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:14:31,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:31,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:31,497 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:14:31,498 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 41 [2021-03-11 00:14:31,517 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:31,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:31,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:31,570 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-03-11 00:14:31,570 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 26 [2021-03-11 00:14:31,575 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:32,113 WARN L205 SmtUtils]: Spent 537.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-03-11 00:14:32,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:14:32,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:32,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:32,200 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-03-11 00:14:32,200 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 35 [2021-03-11 00:14:32,211 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:32,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:32,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:32,241 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-03-11 00:14:32,241 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 1 [2021-03-11 00:14:32,244 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:32,722 WARN L205 SmtUtils]: Spent 478.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-03-11 00:14:32,723 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:14:32,744 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 13 xjuncts. [2021-03-11 00:14:32,744 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:801, output treesize:348 [2021-03-11 00:14:33,226 WARN L205 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 24 [2021-03-11 00:14:33,344 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:33,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:33,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-03-11 00:14:33,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668154014] [2021-03-11 00:14:33,345 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:14:33,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:33,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:14:33,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:14:33,345 INFO L87 Difference]: Start difference. First operand 1900 states and 6444 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:33,584 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 28 [2021-03-11 00:14:33,794 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 37 [2021-03-11 00:14:34,095 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-03-11 00:14:34,332 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2021-03-11 00:14:34,484 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-03-11 00:14:34,796 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2021-03-11 00:14:35,066 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 44 [2021-03-11 00:14:35,687 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2021-03-11 00:14:37,524 WARN L205 SmtUtils]: Spent 847.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2021-03-11 00:14:47,888 WARN L205 SmtUtils]: Spent 10.12 s on a formula simplification. DAG size of input: 79 DAG size of output: 72 [2021-03-11 00:14:48,189 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-11 00:14:48,548 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 22 [2021-03-11 00:14:49,007 WARN L205 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2021-03-11 00:14:49,387 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-03-11 00:14:49,778 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 31 [2021-03-11 00:14:49,999 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 27 [2021-03-11 00:14:50,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:50,331 INFO L93 Difference]: Finished difference Result 2531 states and 8249 transitions. [2021-03-11 00:14:50,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-11 00:14:50,334 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:14:50,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:50,337 INFO L225 Difference]: With dead ends: 2531 [2021-03-11 00:14:50,337 INFO L226 Difference]: Without dead ends: 2486 [2021-03-11 00:14:50,338 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 16998.2ms TimeCoverageRelationStatistics Valid=346, Invalid=1634, Unknown=0, NotChecked=0, Total=1980 [2021-03-11 00:14:50,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2486 states. [2021-03-11 00:14:50,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2486 to 1911. [2021-03-11 00:14:50,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1911 states, 1910 states have (on average 3.399476439790576) internal successors, (6493), 1910 states have internal predecessors, (6493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:50,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1911 states to 1911 states and 6493 transitions. [2021-03-11 00:14:50,362 INFO L78 Accepts]: Start accepts. Automaton has 1911 states and 6493 transitions. Word has length 26 [2021-03-11 00:14:50,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:50,363 INFO L480 AbstractCegarLoop]: Abstraction has 1911 states and 6493 transitions. [2021-03-11 00:14:50,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:50,363 INFO L276 IsEmpty]: Start isEmpty. Operand 1911 states and 6493 transitions. [2021-03-11 00:14:50,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:14:50,365 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:50,365 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:14:50,565 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2323,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:50,565 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:50,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:50,566 INFO L82 PathProgramCache]: Analyzing trace with hash -538930356, now seen corresponding path program 53 times [2021-03-11 00:14:50,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:50,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164202685] [2021-03-11 00:14:50,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:50,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:50,999 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2021-03-11 00:14:51,207 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 24 [2021-03-11 00:14:51,440 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2021-03-11 00:14:51,600 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 29 [2021-03-11 00:14:51,916 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:51,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164202685] [2021-03-11 00:14:51,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448890994] [2021-03-11 00:14:51,917 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 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 [2021-03-11 00:14:51,950 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-11 00:14:51,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:14:51,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-11 00:14:51,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:52,542 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-11 00:14:52,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:52,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:52,749 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:14:52,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 53 [2021-03-11 00:14:52,776 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:52,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:52,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:52,870 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:14:52,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 59 [2021-03-11 00:14:52,889 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:52,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:52,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:52,981 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-03-11 00:14:52,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 40 [2021-03-11 00:14:52,990 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:53,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:53,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:53,065 INFO L354 Elim1Store]: treesize reduction 23, result has 43.9 percent of original size [2021-03-11 00:14:53,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 36 [2021-03-11 00:14:53,068 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:53,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:53,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:53,163 INFO L354 Elim1Store]: treesize reduction 24, result has 41.5 percent of original size [2021-03-11 00:14:53,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 32 [2021-03-11 00:14:53,168 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:53,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:53,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:53,257 INFO L354 Elim1Store]: treesize reduction 33, result has 19.5 percent of original size [2021-03-11 00:14:53,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 23 [2021-03-11 00:14:53,261 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:53,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:53,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:53,318 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-03-11 00:14:53,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 1 [2021-03-11 00:14:53,320 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:53,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:53,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:53,407 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-03-11 00:14:53,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 30 [2021-03-11 00:14:53,411 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:53,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:53,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:53,476 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-03-11 00:14:53,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 1 [2021-03-11 00:14:53,479 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:53,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:53,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:53,570 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-03-11 00:14:53,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 30 [2021-03-11 00:14:53,574 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:53,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:53,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:53,631 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-03-11 00:14:53,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 1 [2021-03-11 00:14:53,634 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:53,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:53,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:53,747 INFO L354 Elim1Store]: treesize reduction 20, result has 51.2 percent of original size [2021-03-11 00:14:53,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 36 [2021-03-11 00:14:53,761 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:53,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:53,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:53,817 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-03-11 00:14:53,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 1 [2021-03-11 00:14:53,820 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:53,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:53,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:53,935 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-03-11 00:14:53,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 27 [2021-03-11 00:14:53,942 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:53,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:53,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:54,011 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-03-11 00:14:54,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 1 [2021-03-11 00:14:54,013 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:54,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:54,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:14:54,046 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-03-11 00:14:54,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 1 [2021-03-11 00:14:54,048 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:14:54,404 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 29 [2021-03-11 00:14:54,405 INFO L628 ElimStorePlain]: treesize reduction 230, result has 32.2 percent of original size [2021-03-11 00:14:54,407 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-11 00:14:54,407 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:865, output treesize:109 [2021-03-11 00:14:54,601 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-03-11 00:14:54,788 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-11 00:14:54,953 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:54,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:54,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-03-11 00:14:54,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778031579] [2021-03-11 00:14:54,954 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-11 00:14:54,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:54,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-11 00:14:54,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:14:54,954 INFO L87 Difference]: Start difference. First operand 1911 states and 6493 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:55,187 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 28 [2021-03-11 00:14:55,374 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 32 [2021-03-11 00:14:55,621 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 37 [2021-03-11 00:14:55,986 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 38 [2021-03-11 00:14:56,460 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-03-11 00:14:56,763 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 36 [2021-03-11 00:14:57,105 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 42 [2021-03-11 00:14:57,295 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2021-03-11 00:14:57,622 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2021-03-11 00:14:57,927 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 40 [2021-03-11 00:14:58,213 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 40 [2021-03-11 00:14:58,586 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2021-03-11 00:14:59,063 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 42 [2021-03-11 00:14:59,309 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 49 [2021-03-11 00:14:59,574 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 39 [2021-03-11 00:14:59,862 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 46 [2021-03-11 00:15:00,208 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2021-03-11 00:15:00,548 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-03-11 00:15:01,110 WARN L205 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 60 [2021-03-11 00:15:01,435 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 50 [2021-03-11 00:15:01,926 WARN L205 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 45 [2021-03-11 00:15:02,409 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 54 [2021-03-11 00:15:02,701 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 41 [2021-03-11 00:15:03,485 WARN L205 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 60 [2021-03-11 00:15:04,375 WARN L205 SmtUtils]: Spent 768.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 66 [2021-03-11 00:15:05,180 WARN L205 SmtUtils]: Spent 711.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 63 [2021-03-11 00:15:05,894 WARN L205 SmtUtils]: Spent 665.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 61 [2021-03-11 00:15:06,749 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-03-11 00:15:07,631 WARN L205 SmtUtils]: Spent 729.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 63 [2021-03-11 00:15:08,103 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 63 [2021-03-11 00:15:08,833 WARN L205 SmtUtils]: Spent 675.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 61 [2021-03-11 00:15:09,612 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2021-03-11 00:15:09,930 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 28 [2021-03-11 00:15:10,436 WARN L205 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2021-03-11 00:15:11,515 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 34 [2021-03-11 00:15:11,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:15:11,620 INFO L93 Difference]: Finished difference Result 3133 states and 9939 transitions. [2021-03-11 00:15:11,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-11 00:15:11,623 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:15:11,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:15:11,627 INFO L225 Difference]: With dead ends: 3133 [2021-03-11 00:15:11,627 INFO L226 Difference]: Without dead ends: 3095 [2021-03-11 00:15:11,628 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 15531.8ms TimeCoverageRelationStatistics Valid=642, Invalid=2898, Unknown=0, NotChecked=0, Total=3540 [2021-03-11 00:15:11,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3095 states. [2021-03-11 00:15:11,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3095 to 1918. [2021-03-11 00:15:11,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1918 states, 1917 states have (on average 3.4042775169535733) internal successors, (6526), 1917 states have internal predecessors, (6526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:11,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1918 states to 1918 states and 6526 transitions. [2021-03-11 00:15:11,656 INFO L78 Accepts]: Start accepts. Automaton has 1918 states and 6526 transitions. Word has length 26 [2021-03-11 00:15:11,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:15:11,656 INFO L480 AbstractCegarLoop]: Abstraction has 1918 states and 6526 transitions. [2021-03-11 00:15:11,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:11,656 INFO L276 IsEmpty]: Start isEmpty. Operand 1918 states and 6526 transitions. [2021-03-11 00:15:11,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:15:11,659 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:15:11,659 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:15:11,859 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2391,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:15:11,860 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:15:11,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:15:11,860 INFO L82 PathProgramCache]: Analyzing trace with hash 871796194, now seen corresponding path program 30 times [2021-03-11 00:15:11,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:15:11,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203413854] [2021-03-11 00:15:11,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:15:11,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:15:12,294 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 32 [2021-03-11 00:15:12,508 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2021-03-11 00:15:12,652 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-03-11 00:15:12,791 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-03-11 00:15:12,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:12,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203413854] [2021-03-11 00:15:12,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946798497] [2021-03-11 00:15:12,879 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 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 [2021-03-11 00:15:12,901 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:15:12,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:15:12,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:15:12,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:15:13,519 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-03-11 00:15:14,139 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-03-11 00:15:14,341 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-03-11 00:15:15,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:15,161 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:15:15,161 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-03-11 00:15:15,165 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:15,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:15,228 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:15:15,228 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-03-11 00:15:15,233 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:15,788 WARN L205 SmtUtils]: Spent 555.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-03-11 00:15:15,789 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:15:15,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:15,850 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:15:15,850 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-03-11 00:15:15,856 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:15,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:15,920 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:15:15,920 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-03-11 00:15:15,932 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:16,366 WARN L205 SmtUtils]: Spent 433.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-03-11 00:15:16,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:15:16,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:16,451 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:15:16,451 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-03-11 00:15:16,465 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:16,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:16,544 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:15:16,544 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-03-11 00:15:16,549 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:17,056 WARN L205 SmtUtils]: Spent 506.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-03-11 00:15:17,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:15:17,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:17,128 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:15:17,128 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-03-11 00:15:17,134 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:17,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:17,182 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:15:17,182 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-03-11 00:15:17,205 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:17,683 WARN L205 SmtUtils]: Spent 477.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-03-11 00:15:17,684 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:15:17,733 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:15:17,733 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:357, output treesize:334 [2021-03-11 00:15:18,480 WARN L205 SmtUtils]: Spent 658.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2021-03-11 00:15:18,781 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 20 [2021-03-11 00:15:18,811 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:18,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:15:18,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-11 00:15:18,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346418096] [2021-03-11 00:15:18,811 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:15:18,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:15:18,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:15:18,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:15:18,812 INFO L87 Difference]: Start difference. First operand 1918 states and 6526 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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) [2021-03-11 00:15:19,186 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 29 [2021-03-11 00:15:19,853 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-03-11 00:15:20,549 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-11 00:15:21,099 WARN L205 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 31 [2021-03-11 00:15:21,287 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-11 00:15:21,755 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2021-03-11 00:15:22,641 WARN L205 SmtUtils]: Spent 572.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2021-03-11 00:15:23,790 WARN L205 SmtUtils]: Spent 868.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 47 [2021-03-11 00:15:25,500 WARN L205 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 111 DAG size of output: 70 [2021-03-11 00:15:25,781 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-03-11 00:15:26,544 WARN L205 SmtUtils]: Spent 543.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2021-03-11 00:15:27,269 WARN L205 SmtUtils]: Spent 406.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-03-11 00:15:27,906 WARN L205 SmtUtils]: Spent 526.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 87 [2021-03-11 00:15:28,557 WARN L205 SmtUtils]: Spent 498.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2021-03-11 00:15:29,658 WARN L205 SmtUtils]: Spent 997.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2021-03-11 00:15:30,391 WARN L205 SmtUtils]: Spent 448.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-03-11 00:15:31,355 WARN L205 SmtUtils]: Spent 756.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 89 [2021-03-11 00:15:32,518 WARN L205 SmtUtils]: Spent 924.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 77 [2021-03-11 00:15:33,923 WARN L205 SmtUtils]: Spent 574.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 31 [2021-03-11 00:15:34,783 WARN L205 SmtUtils]: Spent 732.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 42 [2021-03-11 00:15:35,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:15:35,066 INFO L93 Difference]: Finished difference Result 2567 states and 8413 transitions. [2021-03-11 00:15:35,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-11 00:15:35,069 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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) Word has length 26 [2021-03-11 00:15:35,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:15:35,073 INFO L225 Difference]: With dead ends: 2567 [2021-03-11 00:15:35,073 INFO L226 Difference]: Without dead ends: 2537 [2021-03-11 00:15:35,073 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 15375.0ms TimeCoverageRelationStatistics Valid=275, Invalid=1795, Unknown=0, NotChecked=0, Total=2070 [2021-03-11 00:15:35,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2537 states. [2021-03-11 00:15:35,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2537 to 1920. [2021-03-11 00:15:35,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1920 states, 1919 states have (on average 3.4048983845753) internal successors, (6534), 1919 states have internal predecessors, (6534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:35,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1920 states to 1920 states and 6534 transitions. [2021-03-11 00:15:35,098 INFO L78 Accepts]: Start accepts. Automaton has 1920 states and 6534 transitions. Word has length 26 [2021-03-11 00:15:35,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:15:35,098 INFO L480 AbstractCegarLoop]: Abstraction has 1920 states and 6534 transitions. [2021-03-11 00:15:35,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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) [2021-03-11 00:15:35,098 INFO L276 IsEmpty]: Start isEmpty. Operand 1920 states and 6534 transitions. [2021-03-11 00:15:35,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:15:35,101 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:15:35,101 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:15:35,302 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2428,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:15:35,302 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:15:35,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:15:35,302 INFO L82 PathProgramCache]: Analyzing trace with hash -589649742, now seen corresponding path program 31 times [2021-03-11 00:15:35,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:15:35,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927423480] [2021-03-11 00:15:35,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:15:35,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:15:35,980 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 34 [2021-03-11 00:15:36,527 WARN L205 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-03-11 00:15:36,903 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-03-11 00:15:37,180 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 22 [2021-03-11 00:15:37,358 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 15 [2021-03-11 00:15:37,374 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:37,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927423480] [2021-03-11 00:15:37,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967342669] [2021-03-11 00:15:37,374 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 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 [2021-03-11 00:15:37,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:15:37,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:15:37,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:15:38,025 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-11 00:15:38,384 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-03-11 00:15:39,291 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 60 [2021-03-11 00:15:39,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:15:39,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:39,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:15:39,475 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 33 treesize of output 19 [2021-03-11 00:15:39,479 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:39,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:15:39,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:39,493 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 28 treesize of output 16 [2021-03-11 00:15:39,497 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:40,004 WARN L205 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-03-11 00:15:40,005 INFO L628 ElimStorePlain]: treesize reduction 55, result has 68.4 percent of original size [2021-03-11 00:15:40,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:15:40,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:40,018 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 28 treesize of output 16 [2021-03-11 00:15:40,022 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:40,215 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-11 00:15:40,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:15:40,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:40,227 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 21 treesize of output 13 [2021-03-11 00:15:40,232 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:40,417 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-11 00:15:40,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:15:40,424 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:15:40,424 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 9 variables, input treesize:215, output treesize:51 [2021-03-11 00:15:40,591 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2021-03-11 00:15:40,651 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:40,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:15:40,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-11 00:15:40,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059585568] [2021-03-11 00:15:40,652 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:15:40,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:15:40,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:15:40,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:15:40,652 INFO L87 Difference]: Start difference. First operand 1920 states and 6534 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:40,852 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 28 [2021-03-11 00:15:41,454 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2021-03-11 00:15:41,843 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2021-03-11 00:15:42,779 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 40 [2021-03-11 00:15:42,935 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-03-11 00:15:43,412 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2021-03-11 00:15:43,807 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-03-11 00:15:44,796 WARN L205 SmtUtils]: Spent 720.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2021-03-11 00:15:45,258 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-03-11 00:15:45,443 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-11 00:15:45,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:15:45,585 INFO L93 Difference]: Finished difference Result 2316 states and 7767 transitions. [2021-03-11 00:15:45,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-11 00:15:45,587 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:15:45,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:15:45,591 INFO L225 Difference]: With dead ends: 2316 [2021-03-11 00:15:45,591 INFO L226 Difference]: Without dead ends: 2301 [2021-03-11 00:15:45,591 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 7049.1ms TimeCoverageRelationStatistics Valid=177, Invalid=753, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:15:45,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2301 states. [2021-03-11 00:15:45,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2301 to 1912. [2021-03-11 00:15:45,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1912 states, 1911 states have (on average 3.4081632653061225) internal successors, (6513), 1911 states have internal predecessors, (6513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:45,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1912 states to 1912 states and 6513 transitions. [2021-03-11 00:15:45,615 INFO L78 Accepts]: Start accepts. Automaton has 1912 states and 6513 transitions. Word has length 26 [2021-03-11 00:15:45,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:15:45,615 INFO L480 AbstractCegarLoop]: Abstraction has 1912 states and 6513 transitions. [2021-03-11 00:15:45,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:45,615 INFO L276 IsEmpty]: Start isEmpty. Operand 1912 states and 6513 transitions. [2021-03-11 00:15:45,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:15:45,618 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:15:45,619 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:15:45,835 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2494 [2021-03-11 00:15:45,835 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:15:45,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:15:45,835 INFO L82 PathProgramCache]: Analyzing trace with hash 224636922, now seen corresponding path program 32 times [2021-03-11 00:15:45,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:15:45,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499940298] [2021-03-11 00:15:45,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:15:45,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:15:46,439 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-03-11 00:15:46,640 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-03-11 00:15:46,820 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-03-11 00:15:47,055 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2021-03-11 00:15:47,200 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 12 [2021-03-11 00:15:47,203 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:47,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499940298] [2021-03-11 00:15:47,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421109038] [2021-03-11 00:15:47,204 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 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 [2021-03-11 00:15:47,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:15:47,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:15:47,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:15:47,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:15:47,746 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-11 00:15:47,982 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-03-11 00:15:48,211 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-11 00:15:48,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:15:48,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:48,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:15:48,389 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 20 [2021-03-11 00:15:48,394 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:48,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:15:48,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:48,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:15:48,413 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 26 [2021-03-11 00:15:48,417 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:48,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:15:48,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:48,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:15:48,436 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 45 treesize of output 23 [2021-03-11 00:15:48,440 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:48,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:15:48,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:48,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:15:48,460 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 40 treesize of output 20 [2021-03-11 00:15:48,464 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:48,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:15:48,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:48,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:15:48,483 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 50 treesize of output 26 [2021-03-11 00:15:48,487 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:48,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:15:48,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:48,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:15:48,509 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 20 [2021-03-11 00:15:48,514 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:48,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:15:48,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:48,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:15:48,533 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 41 treesize of output 23 [2021-03-11 00:15:48,537 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:48,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:15:48,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:48,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:15:48,561 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 29 treesize of output 17 [2021-03-11 00:15:48,567 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:48,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:15:48,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:48,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:15:48,588 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 39 treesize of output 23 [2021-03-11 00:15:48,593 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:48,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:15:48,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:48,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:15:48,613 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 45 treesize of output 23 [2021-03-11 00:15:48,618 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:48,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:15:48,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:48,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:15:48,639 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 43 treesize of output 23 [2021-03-11 00:15:48,643 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:48,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:15:48,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:48,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:15:48,664 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 52 treesize of output 26 [2021-03-11 00:15:48,668 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:48,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:15:48,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:48,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:15:48,688 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 47 treesize of output 23 [2021-03-11 00:15:48,692 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:48,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:15:48,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:48,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:15:48,711 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 20 [2021-03-11 00:15:48,716 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:48,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:15:48,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:48,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:15:48,735 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 20 [2021-03-11 00:15:48,740 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:48,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:15:48,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:15:48,752 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 41 treesize of output 23 [2021-03-11 00:15:48,756 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:15:49,274 WARN L205 SmtUtils]: Spent 518.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 29 [2021-03-11 00:15:49,275 INFO L628 ElimStorePlain]: treesize reduction 343, result has 25.3 percent of original size [2021-03-11 00:15:49,278 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:15:49,278 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:929, output treesize:116 [2021-03-11 00:15:49,512 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-03-11 00:15:49,688 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:49,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:15:49,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-03-11 00:15:49,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948859104] [2021-03-11 00:15:49,688 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:15:49,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:15:49,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:15:49,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:15:49,689 INFO L87 Difference]: Start difference. First operand 1912 states and 6513 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:49,922 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 28 [2021-03-11 00:15:50,638 WARN L205 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2021-03-11 00:15:51,144 WARN L205 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-03-11 00:15:51,852 WARN L205 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 40 [2021-03-11 00:15:52,024 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-11 00:15:52,726 WARN L205 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-03-11 00:15:53,480 WARN L205 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 57 [2021-03-11 00:15:53,699 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-03-11 00:15:54,350 WARN L205 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 58 [2021-03-11 00:15:54,844 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-03-11 00:15:55,473 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 24 [2021-03-11 00:15:55,885 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-11 00:15:56,840 WARN L205 SmtUtils]: Spent 615.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 44 [2021-03-11 00:15:57,173 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-03-11 00:15:57,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:15:57,379 INFO L93 Difference]: Finished difference Result 2750 states and 9029 transitions. [2021-03-11 00:15:57,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-11 00:15:57,383 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:15:57,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:15:57,388 INFO L225 Difference]: With dead ends: 2750 [2021-03-11 00:15:57,388 INFO L226 Difference]: Without dead ends: 2714 [2021-03-11 00:15:57,388 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 7976.1ms TimeCoverageRelationStatistics Valid=229, Invalid=893, Unknown=0, NotChecked=0, Total=1122 [2021-03-11 00:15:57,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2714 states. [2021-03-11 00:15:57,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2714 to 1938. [2021-03-11 00:15:57,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1938 states, 1937 states have (on average 3.4021683014971607) internal successors, (6590), 1937 states have internal predecessors, (6590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:57,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1938 states to 1938 states and 6590 transitions. [2021-03-11 00:15:57,428 INFO L78 Accepts]: Start accepts. Automaton has 1938 states and 6590 transitions. Word has length 26 [2021-03-11 00:15:57,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:15:57,428 INFO L480 AbstractCegarLoop]: Abstraction has 1938 states and 6590 transitions. [2021-03-11 00:15:57,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:57,428 INFO L276 IsEmpty]: Start isEmpty. Operand 1938 states and 6590 transitions. [2021-03-11 00:15:57,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:15:57,431 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:15:57,431 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:15:57,651 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2514,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:15:57,651 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:15:57,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:15:57,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1013178648, now seen corresponding path program 33 times [2021-03-11 00:15:57,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:15:57,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856102193] [2021-03-11 00:15:57,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:15:57,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:15:58,194 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 33 [2021-03-11 00:15:58,558 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-03-11 00:15:58,802 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2021-03-11 00:15:59,023 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:59,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856102193] [2021-03-11 00:15:59,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295100878] [2021-03-11 00:15:59,023 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 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 [2021-03-11 00:15:59,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-11 00:15:59,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:15:59,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:15:59,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:15:59,803 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-11 00:16:00,164 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-03-11 00:16:00,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:00,590 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:16:00,590 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-03-11 00:16:00,620 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:00,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:00,697 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:16:00,698 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-03-11 00:16:00,710 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:01,909 WARN L205 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 92 DAG size of output: 88 [2021-03-11 00:16:01,909 INFO L628 ElimStorePlain]: treesize reduction 17, result has 95.0 percent of original size [2021-03-11 00:16:01,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:01,977 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:16:01,977 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-03-11 00:16:01,983 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:02,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:02,073 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:16:02,073 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-03-11 00:16:02,079 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:02,716 WARN L205 SmtUtils]: Spent 635.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-03-11 00:16:02,717 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:16:02,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:02,817 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:16:02,817 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-03-11 00:16:02,821 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:02,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:02,897 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:16:02,897 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-03-11 00:16:02,903 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:03,537 WARN L205 SmtUtils]: Spent 633.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-03-11 00:16:03,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:16:03,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:03,627 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:16:03,627 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-03-11 00:16:03,642 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:03,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:03,700 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:16:03,700 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-03-11 00:16:03,721 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:04,256 WARN L205 SmtUtils]: Spent 534.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-03-11 00:16:04,257 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:16:04,303 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:16:04,304 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:357, output treesize:292 [2021-03-11 00:16:05,377 WARN L205 SmtUtils]: Spent 994.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2021-03-11 00:16:05,764 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 21 [2021-03-11 00:16:05,824 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:16:05,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:16:05,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-03-11 00:16:05,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977242710] [2021-03-11 00:16:05,825 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:16:05,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:16:05,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:16:05,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:16:05,825 INFO L87 Difference]: Start difference. First operand 1938 states and 6590 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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) [2021-03-11 00:16:06,377 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 20 [2021-03-11 00:16:06,764 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 39 [2021-03-11 00:16:07,475 WARN L205 SmtUtils]: Spent 518.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 41 [2021-03-11 00:16:08,728 WARN L205 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 89 DAG size of output: 74 [2021-03-11 00:16:10,463 WARN L205 SmtUtils]: Spent 1.53 s on a formula simplification. DAG size of input: 87 DAG size of output: 66 [2021-03-11 00:16:11,204 WARN L205 SmtUtils]: Spent 611.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 47 [2021-03-11 00:16:12,088 WARN L205 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 72 [2021-03-11 00:16:13,096 WARN L205 SmtUtils]: Spent 757.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2021-03-11 00:16:13,746 WARN L205 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 70 [2021-03-11 00:16:14,809 WARN L205 SmtUtils]: Spent 857.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2021-03-11 00:16:15,297 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 31 [2021-03-11 00:16:15,895 WARN L205 SmtUtils]: Spent 525.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 40 [2021-03-11 00:16:16,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:16:16,025 INFO L93 Difference]: Finished difference Result 2529 states and 8394 transitions. [2021-03-11 00:16:16,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-11 00:16:16,027 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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) Word has length 26 [2021-03-11 00:16:16,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:16:16,031 INFO L225 Difference]: With dead ends: 2529 [2021-03-11 00:16:16,031 INFO L226 Difference]: Without dead ends: 2514 [2021-03-11 00:16:16,031 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 12104.1ms TimeCoverageRelationStatistics Valid=210, Invalid=846, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:16:16,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-03-11 00:16:16,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 1937. [2021-03-11 00:16:16,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1937 states, 1936 states have (on average 3.4008264462809916) internal successors, (6584), 1936 states have internal predecessors, (6584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:16:16,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1937 states to 1937 states and 6584 transitions. [2021-03-11 00:16:16,054 INFO L78 Accepts]: Start accepts. Automaton has 1937 states and 6584 transitions. Word has length 26 [2021-03-11 00:16:16,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:16:16,054 INFO L480 AbstractCegarLoop]: Abstraction has 1937 states and 6584 transitions. [2021-03-11 00:16:16,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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) [2021-03-11 00:16:16,054 INFO L276 IsEmpty]: Start isEmpty. Operand 1937 states and 6584 transitions. [2021-03-11 00:16:16,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:16:16,056 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:16:16,056 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:16:16,259 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2532 [2021-03-11 00:16:16,259 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:16:16,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:16:16,259 INFO L82 PathProgramCache]: Analyzing trace with hash -964138634, now seen corresponding path program 34 times [2021-03-11 00:16:16,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:16:16,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492290805] [2021-03-11 00:16:16,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:16:16,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:16:16,745 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2021-03-11 00:16:17,237 WARN L205 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2021-03-11 00:16:17,421 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-03-11 00:16:17,623 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2021-03-11 00:16:17,697 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:16:17,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492290805] [2021-03-11 00:16:17,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088306958] [2021-03-11 00:16:17,698 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 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 [2021-03-11 00:16:17,717 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:16:17,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:16:17,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:16:17,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:16:18,220 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-11 00:16:18,905 WARN L205 SmtUtils]: Spent 431.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-03-11 00:16:19,840 WARN L205 SmtUtils]: Spent 561.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 68 [2021-03-11 00:16:20,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:16:20,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:20,169 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 28 treesize of output 16 [2021-03-11 00:16:20,173 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:20,818 WARN L205 SmtUtils]: Spent 644.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2021-03-11 00:16:20,819 INFO L628 ElimStorePlain]: treesize reduction 62, result has 72.6 percent of original size [2021-03-11 00:16:20,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:20,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-03-11 00:16:20,841 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:21,080 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-03-11 00:16:21,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:16:21,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:16:21,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:21,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:16:21,100 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 21 treesize of output 13 [2021-03-11 00:16:21,104 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:21,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:16:21,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:21,117 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 28 treesize of output 16 [2021-03-11 00:16:21,120 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:21,276 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-03-11 00:16:21,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:16:21,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:16:21,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:21,287 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 28 treesize of output 16 [2021-03-11 00:16:21,290 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:21,501 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-11 00:16:21,502 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:16:21,511 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:16:21,511 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 12 variables, input treesize:247, output treesize:51 [2021-03-11 00:16:21,703 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2021-03-11 00:16:21,780 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:16:21,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:16:21,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-11 00:16:21,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794957761] [2021-03-11 00:16:21,781 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:16:21,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:16:21,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:16:21,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:16:21,781 INFO L87 Difference]: Start difference. First operand 1937 states and 6584 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:16:22,132 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 28 [2021-03-11 00:16:22,436 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-03-11 00:16:23,077 WARN L205 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2021-03-11 00:16:23,599 WARN L205 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2021-03-11 00:16:24,205 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-11 00:16:24,935 WARN L205 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 41 [2021-03-11 00:16:25,201 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2021-03-11 00:16:25,782 WARN L205 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 35 [2021-03-11 00:16:26,352 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 31 [2021-03-11 00:16:26,765 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-03-11 00:16:28,753 WARN L205 SmtUtils]: Spent 1.67 s on a formula simplification. DAG size of input: 146 DAG size of output: 126 [2021-03-11 00:16:29,687 WARN L205 SmtUtils]: Spent 766.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2021-03-11 00:16:30,863 WARN L205 SmtUtils]: Spent 585.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-03-11 00:16:32,359 WARN L205 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 157 DAG size of output: 122 [2021-03-11 00:16:33,018 WARN L205 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-03-11 00:16:33,663 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-03-11 00:16:33,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:16:33,764 INFO L93 Difference]: Finished difference Result 2833 states and 9241 transitions. [2021-03-11 00:16:33,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-11 00:16:33,768 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:16:33,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:16:33,772 INFO L225 Difference]: With dead ends: 2833 [2021-03-11 00:16:33,772 INFO L226 Difference]: Without dead ends: 2788 [2021-03-11 00:16:33,773 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 12432.4ms TimeCoverageRelationStatistics Valid=247, Invalid=1013, Unknown=0, NotChecked=0, Total=1260 [2021-03-11 00:16:33,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2788 states. [2021-03-11 00:16:33,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2788 to 1948. [2021-03-11 00:16:33,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1948 states, 1947 states have (on average 3.403697996918336) internal successors, (6627), 1947 states have internal predecessors, (6627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:16:33,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1948 states to 1948 states and 6627 transitions. [2021-03-11 00:16:33,799 INFO L78 Accepts]: Start accepts. Automaton has 1948 states and 6627 transitions. Word has length 26 [2021-03-11 00:16:33,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:16:33,799 INFO L480 AbstractCegarLoop]: Abstraction has 1948 states and 6627 transitions. [2021-03-11 00:16:33,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:16:33,799 INFO L276 IsEmpty]: Start isEmpty. Operand 1948 states and 6627 transitions. [2021-03-11 00:16:33,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:16:33,801 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:16:33,802 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:16:34,002 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2574 [2021-03-11 00:16:34,002 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:16:34,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:16:34,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1713295882, now seen corresponding path program 35 times [2021-03-11 00:16:34,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:16:34,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468535050] [2021-03-11 00:16:34,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:16:34,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:16:34,630 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-03-11 00:16:34,978 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2021-03-11 00:16:35,244 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2021-03-11 00:16:35,497 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:16:35,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468535050] [2021-03-11 00:16:35,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106467765] [2021-03-11 00:16:35,498 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 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 [2021-03-11 00:16:35,518 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:16:35,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:16:35,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:16:35,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:16:36,043 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-11 00:16:36,241 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-11 00:16:36,914 WARN L205 SmtUtils]: Spent 539.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-03-11 00:16:37,035 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_305, A, v_prenex_293, v_prenex_295, v_prenex_297, v_prenex_301], 3=[v_prenex_299, v_prenex_303]} [2021-03-11 00:16:37,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:37,080 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:16:37,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-03-11 00:16:37,088 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:37,493 WARN L205 SmtUtils]: Spent 404.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-03-11 00:16:37,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:16:37,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:37,526 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:16:37,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-03-11 00:16:37,530 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:37,988 WARN L205 SmtUtils]: Spent 457.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-03-11 00:16:37,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:16:38,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:38,034 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:16:38,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-03-11 00:16:38,041 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:38,586 WARN L205 SmtUtils]: Spent 544.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-03-11 00:16:38,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:16:38,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:38,630 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:16:38,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-03-11 00:16:38,649 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:39,164 WARN L205 SmtUtils]: Spent 514.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-03-11 00:16:39,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:16:39,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:39,209 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:16:39,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-03-11 00:16:39,215 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:39,737 WARN L205 SmtUtils]: Spent 522.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-03-11 00:16:39,739 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:16:39,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:39,779 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:16:39,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-03-11 00:16:39,789 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:40,308 WARN L205 SmtUtils]: Spent 518.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-03-11 00:16:40,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:16:40,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:40,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:40,357 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-03-11 00:16:40,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2021-03-11 00:16:40,364 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:40,849 WARN L205 SmtUtils]: Spent 483.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-03-11 00:16:40,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:16:40,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:40,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:40,893 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:16:40,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-03-11 00:16:40,910 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:41,368 WARN L205 SmtUtils]: Spent 457.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2021-03-11 00:16:41,369 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:16:41,387 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:16:41,387 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:317, output treesize:184 [2021-03-11 00:16:41,891 WARN L205 SmtUtils]: Spent 382.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-11 00:16:42,258 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 20 [2021-03-11 00:16:42,352 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:16:42,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:16:42,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-11 00:16:42,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402261971] [2021-03-11 00:16:42,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:16:42,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:16:42,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:16:42,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:16:42,353 INFO L87 Difference]: Start difference. First operand 1948 states and 6627 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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) [2021-03-11 00:16:42,746 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 29 [2021-03-11 00:16:43,014 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-11 00:16:43,472 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 29 [2021-03-11 00:16:43,960 WARN L205 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 38 [2021-03-11 00:16:44,352 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2021-03-11 00:16:44,600 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-11 00:16:45,297 WARN L205 SmtUtils]: Spent 498.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-03-11 00:16:46,035 WARN L205 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 48 [2021-03-11 00:16:46,299 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-11 00:16:46,874 WARN L205 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 46 [2021-03-11 00:16:47,653 WARN L205 SmtUtils]: Spent 597.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-03-11 00:16:49,153 WARN L205 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-03-11 00:16:51,531 WARN L205 SmtUtils]: Spent 2.28 s on a formula simplification. DAG size of input: 84 DAG size of output: 58 [2021-03-11 00:16:52,120 WARN L205 SmtUtils]: Spent 413.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2021-03-11 00:16:53,054 WARN L205 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 31 [2021-03-11 00:16:53,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:16:53,547 INFO L93 Difference]: Finished difference Result 2625 states and 8640 transitions. [2021-03-11 00:16:53,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-11 00:16:53,551 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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) Word has length 26 [2021-03-11 00:16:53,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:16:53,555 INFO L225 Difference]: With dead ends: 2625 [2021-03-11 00:16:53,556 INFO L226 Difference]: Without dead ends: 2595 [2021-03-11 00:16:53,556 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 12724.2ms TimeCoverageRelationStatistics Valid=261, Invalid=1145, Unknown=0, NotChecked=0, Total=1406 [2021-03-11 00:16:53,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2595 states. [2021-03-11 00:16:53,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2595 to 1935. [2021-03-11 00:16:53,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1935 states, 1934 states have (on average 3.4012409513960704) internal successors, (6578), 1934 states have internal predecessors, (6578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:16:53,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1935 states to 1935 states and 6578 transitions. [2021-03-11 00:16:53,582 INFO L78 Accepts]: Start accepts. Automaton has 1935 states and 6578 transitions. Word has length 26 [2021-03-11 00:16:53,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:16:53,583 INFO L480 AbstractCegarLoop]: Abstraction has 1935 states and 6578 transitions. [2021-03-11 00:16:53,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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) [2021-03-11 00:16:53,583 INFO L276 IsEmpty]: Start isEmpty. Operand 1935 states and 6578 transitions. [2021-03-11 00:16:53,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:16:53,585 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:16:53,585 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:16:53,785 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2587,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:16:53,786 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:16:53,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:16:53,786 INFO L82 PathProgramCache]: Analyzing trace with hash 663462910, now seen corresponding path program 36 times [2021-03-11 00:16:53,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:16:53,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242612571] [2021-03-11 00:16:53,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:16:53,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:16:54,265 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 29 [2021-03-11 00:16:54,553 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 24 [2021-03-11 00:16:54,819 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2021-03-11 00:16:55,073 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2021-03-11 00:16:55,220 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 12 [2021-03-11 00:16:55,223 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:16:55,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242612571] [2021-03-11 00:16:55,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424461751] [2021-03-11 00:16:55,224 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 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 [2021-03-11 00:16:55,244 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:16:55,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:16:55,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:16:55,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:16:55,869 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-03-11 00:16:56,287 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-11 00:16:57,142 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-03-11 00:16:58,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:58,281 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:16:58,281 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-03-11 00:16:58,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:58,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:58,367 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:16:58,367 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-03-11 00:16:58,378 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:59,145 WARN L205 SmtUtils]: Spent 766.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-03-11 00:16:59,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:16:59,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:59,229 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:16:59,229 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-03-11 00:16:59,263 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:16:59,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:16:59,345 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:16:59,345 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-03-11 00:16:59,352 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:00,062 WARN L205 SmtUtils]: Spent 709.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-03-11 00:17:00,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:17:00,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:17:00,149 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:17:00,149 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-03-11 00:17:00,154 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:00,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:17:00,232 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:17:00,232 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-03-11 00:17:00,239 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:00,951 WARN L205 SmtUtils]: Spent 711.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-03-11 00:17:00,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:17:00,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:17:01,066 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:17:01,067 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-03-11 00:17:01,085 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:01,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:17:01,182 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:17:01,182 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-03-11 00:17:01,189 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:01,872 WARN L205 SmtUtils]: Spent 682.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-03-11 00:17:01,873 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:17:01,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:17:01,944 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:365, output treesize:365 [2021-03-11 00:17:03,229 WARN L205 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2021-03-11 00:17:03,633 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 21 [2021-03-11 00:17:03,675 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:17:03,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:17:03,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-11 00:17:03,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998343537] [2021-03-11 00:17:03,675 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:17:03,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:17:03,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:17:03,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:17:03,676 INFO L87 Difference]: Start difference. First operand 1935 states and 6578 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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) [2021-03-11 00:17:04,101 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 26 [2021-03-11 00:17:04,798 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 32 [2021-03-11 00:17:05,271 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2021-03-11 00:17:05,950 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 32 [2021-03-11 00:17:06,175 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-03-11 00:17:06,587 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2021-03-11 00:17:07,138 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-03-11 00:17:07,451 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-11 00:17:08,164 WARN L205 SmtUtils]: Spent 619.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2021-03-11 00:17:08,568 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2021-03-11 00:17:09,356 WARN L205 SmtUtils]: Spent 617.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 41 [2021-03-11 00:17:09,945 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-11 00:17:10,666 WARN L205 SmtUtils]: Spent 629.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 40 [2021-03-11 00:17:12,352 WARN L205 SmtUtils]: Spent 1.57 s on a formula simplification. DAG size of input: 75 DAG size of output: 74 [2021-03-11 00:17:13,233 WARN L205 SmtUtils]: Spent 718.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2021-03-11 00:17:14,266 WARN L205 SmtUtils]: Spent 587.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 61 [2021-03-11 00:17:15,236 WARN L205 SmtUtils]: Spent 765.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2021-03-11 00:17:16,209 WARN L205 SmtUtils]: Spent 771.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 70 [2021-03-11 00:17:17,477 WARN L205 SmtUtils]: Spent 776.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 67 [2021-03-11 00:17:19,271 WARN L205 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 66 DAG size of output: 39 [2021-03-11 00:17:19,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:17:19,491 INFO L93 Difference]: Finished difference Result 2627 states and 8594 transitions. [2021-03-11 00:17:19,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-11 00:17:19,495 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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) Word has length 26 [2021-03-11 00:17:19,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:17:19,500 INFO L225 Difference]: With dead ends: 2627 [2021-03-11 00:17:19,500 INFO L226 Difference]: Without dead ends: 2587 [2021-03-11 00:17:19,500 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 16715.9ms TimeCoverageRelationStatistics Valid=303, Invalid=1767, Unknown=0, NotChecked=0, Total=2070 [2021-03-11 00:17:19,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2587 states. [2021-03-11 00:17:19,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2587 to 1944. [2021-03-11 00:17:19,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1944 states, 1943 states have (on average 3.4040144107050954) internal successors, (6614), 1943 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) [2021-03-11 00:17:19,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1944 states to 1944 states and 6614 transitions. [2021-03-11 00:17:19,533 INFO L78 Accepts]: Start accepts. Automaton has 1944 states and 6614 transitions. Word has length 26 [2021-03-11 00:17:19,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:17:19,533 INFO L480 AbstractCegarLoop]: Abstraction has 1944 states and 6614 transitions. [2021-03-11 00:17:19,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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) [2021-03-11 00:17:19,534 INFO L276 IsEmpty]: Start isEmpty. Operand 1944 states and 6614 transitions. [2021-03-11 00:17:19,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:17:19,538 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:17:19,538 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:17:19,751 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2602,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:17:19,751 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:17:19,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:17:19,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1571862210, now seen corresponding path program 37 times [2021-03-11 00:17:19,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:17:19,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776013454] [2021-03-11 00:17:19,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:17:19,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:17:20,365 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 31 [2021-03-11 00:17:20,582 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-03-11 00:17:20,794 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2021-03-11 00:17:20,942 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 17 [2021-03-11 00:17:21,081 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:17:21,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776013454] [2021-03-11 00:17:21,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338510716] [2021-03-11 00:17:21,082 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 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 [2021-03-11 00:17:21,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:17:21,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:17:21,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:17:21,686 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-03-11 00:17:21,974 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-11 00:17:22,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:17:22,456 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:17:22,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-03-11 00:17:22,462 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:22,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:17:22,522 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:17:22,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-03-11 00:17:22,530 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:22,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:17:22,599 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:17:22,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-03-11 00:17:22,619 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:22,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:17:22,679 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:17:22,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 20 [2021-03-11 00:17:22,686 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:22,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:17:22,727 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:17:22,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:17:22,731 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:22,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:17:22,773 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:17:22,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 19 [2021-03-11 00:17:22,778 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:22,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:17:22,818 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:17:22,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:17:22,823 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:22,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:17:22,864 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:17:22,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2021-03-11 00:17:22,869 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:22,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:17:22,929 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:17:22,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-03-11 00:17:22,938 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:22,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:17:22,995 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:17:22,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-03-11 00:17:23,006 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:23,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:17:23,048 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:17:23,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-03-11 00:17:23,053 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:23,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:17:23,109 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:17:23,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-03-11 00:17:23,119 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:23,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:17:23,163 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:17:23,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-03-11 00:17:23,168 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:23,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:17:23,220 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:17:23,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-03-11 00:17:23,240 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:23,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:17:23,280 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:17:23,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-03-11 00:17:23,285 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:23,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:17:23,308 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-03-11 00:17:23,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-03-11 00:17:23,313 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:23,736 WARN L205 SmtUtils]: Spent 423.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-11 00:17:23,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:17:23,749 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:17:23,749 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:689, output treesize:174 [2021-03-11 00:17:24,208 WARN L205 SmtUtils]: Spent 384.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-11 00:17:24,614 WARN L205 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 20 [2021-03-11 00:17:24,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:17:24,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:17:24,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:17:24,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477551955] [2021-03-11 00:17:24,719 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:17:24,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:17:24,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:17:24,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:17:24,720 INFO L87 Difference]: Start difference. First operand 1944 states and 6614 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:17:24,937 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 25 [2021-03-11 00:17:25,505 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 32 [2021-03-11 00:17:25,722 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 21 [2021-03-11 00:17:26,311 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-11 00:17:26,655 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-03-11 00:17:27,056 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-11 00:17:27,733 WARN L205 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-03-11 00:17:28,475 WARN L205 SmtUtils]: Spent 403.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-11 00:17:29,590 WARN L205 SmtUtils]: Spent 976.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2021-03-11 00:17:30,255 WARN L205 SmtUtils]: Spent 590.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-03-11 00:17:30,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:17:30,567 INFO L93 Difference]: Finished difference Result 2697 states and 8928 transitions. [2021-03-11 00:17:30,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-11 00:17:30,571 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:17:30,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:17:30,576 INFO L225 Difference]: With dead ends: 2697 [2021-03-11 00:17:30,576 INFO L226 Difference]: Without dead ends: 2672 [2021-03-11 00:17:30,576 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 7226.3ms TimeCoverageRelationStatistics Valid=228, Invalid=828, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:17:30,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2672 states. [2021-03-11 00:17:30,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2672 to 1935. [2021-03-11 00:17:30,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1935 states, 1934 states have (on average 3.4012409513960704) internal successors, (6578), 1934 states have internal predecessors, (6578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:17:30,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1935 states to 1935 states and 6578 transitions. [2021-03-11 00:17:30,605 INFO L78 Accepts]: Start accepts. Automaton has 1935 states and 6578 transitions. Word has length 26 [2021-03-11 00:17:30,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:17:30,605 INFO L480 AbstractCegarLoop]: Abstraction has 1935 states and 6578 transitions. [2021-03-11 00:17:30,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:17:30,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1935 states and 6578 transitions. [2021-03-11 00:17:30,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:17:30,608 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:17:30,608 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:17:30,808 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2672 [2021-03-11 00:17:30,808 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:17:30,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:17:30,808 INFO L82 PathProgramCache]: Analyzing trace with hash 794427266, now seen corresponding path program 38 times [2021-03-11 00:17:30,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:17:30,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210996279] [2021-03-11 00:17:30,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:17:30,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:17:31,450 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 33 [2021-03-11 00:17:31,666 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 23 [2021-03-11 00:17:31,832 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 14 [2021-03-11 00:17:32,042 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2021-03-11 00:17:32,175 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 12 [2021-03-11 00:17:32,179 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:17:32,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210996279] [2021-03-11 00:17:32,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366801586] [2021-03-11 00:17:32,180 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 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 [2021-03-11 00:17:32,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:17:32,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:17:32,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-11 00:17:32,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:17:32,883 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-03-11 00:17:33,266 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-11 00:17:34,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:17:34,143 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:17:34,144 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-03-11 00:17:34,149 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:34,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:17:34,204 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:17:34,205 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-03-11 00:17:34,229 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:34,745 WARN L205 SmtUtils]: Spent 516.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-03-11 00:17:34,747 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:17:34,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:17:34,832 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:17:34,832 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-03-11 00:17:34,855 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:34,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:17:34,945 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:17:34,945 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-03-11 00:17:34,952 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:36,296 WARN L205 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2021-03-11 00:17:36,297 INFO L628 ElimStorePlain]: treesize reduction 9, result has 97.0 percent of original size [2021-03-11 00:17:36,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:17:36,413 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:17:36,413 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-03-11 00:17:36,432 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:36,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:17:36,529 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:17:36,530 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-03-11 00:17:36,536 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:37,006 WARN L205 SmtUtils]: Spent 469.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-03-11 00:17:37,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:17:37,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:17:37,061 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:17:37,061 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-03-11 00:17:37,071 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:37,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:17:37,144 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:17:37,144 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-03-11 00:17:37,150 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:38,436 WARN L205 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2021-03-11 00:17:38,438 INFO L628 ElimStorePlain]: treesize reduction 9, result has 96.5 percent of original size [2021-03-11 00:17:38,497 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:17:38,497 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:349, output treesize:253 [2021-03-11 00:17:39,608 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-03-11 00:17:40,030 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 20 [2021-03-11 00:17:40,116 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:17:40,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:17:40,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-03-11 00:17:40,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088955481] [2021-03-11 00:17:40,117 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:17:40,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:17:40,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:17:40,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:17:40,117 INFO L87 Difference]: Start difference. First operand 1935 states and 6578 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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) [2021-03-11 00:17:40,711 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 33 [2021-03-11 00:17:41,011 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2021-03-11 00:17:41,581 WARN L205 SmtUtils]: Spent 515.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-11 00:17:42,105 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-03-11 00:17:42,707 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-11 00:17:43,504 WARN L205 SmtUtils]: Spent 684.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-03-11 00:17:44,334 WARN L205 SmtUtils]: Spent 545.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 30 [2021-03-11 00:17:44,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:17:44,543 INFO L93 Difference]: Finished difference Result 2142 states and 7177 transitions. [2021-03-11 00:17:44,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-11 00:17:44,548 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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) Word has length 26 [2021-03-11 00:17:44,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:17:44,551 INFO L225 Difference]: With dead ends: 2142 [2021-03-11 00:17:44,551 INFO L226 Difference]: Without dead ends: 2117 [2021-03-11 00:17:44,552 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 6732.5ms TimeCoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2021-03-11 00:17:44,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2117 states. [2021-03-11 00:17:44,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2117 to 1917. [2021-03-11 00:17:44,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1917 states, 1916 states have (on average 3.405010438413361) internal successors, (6524), 1916 states have internal predecessors, (6524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:17:44,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1917 states to 1917 states and 6524 transitions. [2021-03-11 00:17:44,578 INFO L78 Accepts]: Start accepts. Automaton has 1917 states and 6524 transitions. Word has length 26 [2021-03-11 00:17:44,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:17:44,579 INFO L480 AbstractCegarLoop]: Abstraction has 1917 states and 6524 transitions. [2021-03-11 00:17:44,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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) [2021-03-11 00:17:44,579 INFO L276 IsEmpty]: Start isEmpty. Operand 1917 states and 6524 transitions. [2021-03-11 00:17:44,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:17:44,581 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:17:44,581 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:17:44,782 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2709,92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:17:44,782 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:17:44,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:17:44,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1247883966, now seen corresponding path program 39 times [2021-03-11 00:17:44,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:17:44,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469335060] [2021-03-11 00:17:44,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:17:44,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:17:45,337 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2021-03-11 00:17:45,650 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2021-03-11 00:17:45,819 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 17 [2021-03-11 00:17:45,937 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:17:45,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469335060] [2021-03-11 00:17:45,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496857022] [2021-03-11 00:17:45,937 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 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 [2021-03-11 00:17:45,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:17:45,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:17:45,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-11 00:17:45,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:17:46,651 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-11 00:17:47,340 WARN L205 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2021-03-11 00:17:47,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:17:47,979 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:17:47,980 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-03-11 00:17:47,986 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:48,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:17:48,057 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:17:48,057 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-03-11 00:17:48,082 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:49,660 WARN L205 SmtUtils]: Spent 1.58 s on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2021-03-11 00:17:49,662 INFO L628 ElimStorePlain]: treesize reduction 12, result has 96.7 percent of original size [2021-03-11 00:17:49,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:17:49,770 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:17:49,770 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-03-11 00:17:49,779 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:49,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:17:49,853 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:17:49,853 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-03-11 00:17:49,882 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:50,615 WARN L205 SmtUtils]: Spent 732.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-03-11 00:17:50,616 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:17:50,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:17:50,743 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:17:50,743 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 31 [2021-03-11 00:17:50,749 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:50,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:17:50,824 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:17:50,824 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-03-11 00:17:50,840 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:52,207 WARN L205 SmtUtils]: Spent 1.37 s on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2021-03-11 00:17:52,208 INFO L628 ElimStorePlain]: treesize reduction 8, result has 97.4 percent of original size [2021-03-11 00:17:52,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:17:52,323 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:17:52,323 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-03-11 00:17:52,343 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:52,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:17:52,446 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:17:52,446 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-03-11 00:17:52,453 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:17:53,123 WARN L205 SmtUtils]: Spent 668.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-03-11 00:17:53,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:17:53,195 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:17:53,195 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:381, output treesize:277 [2021-03-11 00:17:54,163 WARN L205 SmtUtils]: Spent 873.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2021-03-11 00:17:54,426 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 21 [2021-03-11 00:17:54,539 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:17:54,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:17:54,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-11 00:17:54,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009998860] [2021-03-11 00:17:54,540 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:17:54,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:17:54,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:17:54,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:17:54,540 INFO L87 Difference]: Start difference. First operand 1917 states and 6524 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:17:56,096 WARN L205 SmtUtils]: Spent 747.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 41 [2021-03-11 00:17:56,986 WARN L205 SmtUtils]: Spent 800.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 41 [2021-03-11 00:17:57,624 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-11 00:17:57,963 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-03-11 00:17:58,779 WARN L205 SmtUtils]: Spent 467.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-03-11 00:17:58,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:17:58,997 INFO L93 Difference]: Finished difference Result 2427 states and 8111 transitions. [2021-03-11 00:17:59,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-11 00:17:59,002 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:17:59,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:17:59,006 INFO L225 Difference]: With dead ends: 2427 [2021-03-11 00:17:59,007 INFO L226 Difference]: Without dead ends: 2402 [2021-03-11 00:17:59,007 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 6541.5ms TimeCoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2021-03-11 00:17:59,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2402 states. [2021-03-11 00:17:59,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2402 to 1906. [2021-03-11 00:17:59,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1906 states, 1905 states have (on average 3.4031496062992126) internal successors, (6483), 1905 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) [2021-03-11 00:17:59,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1906 states to 1906 states and 6483 transitions. [2021-03-11 00:17:59,034 INFO L78 Accepts]: Start accepts. Automaton has 1906 states and 6483 transitions. Word has length 26 [2021-03-11 00:17:59,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:17:59,034 INFO L480 AbstractCegarLoop]: Abstraction has 1906 states and 6483 transitions. [2021-03-11 00:17:59,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:17:59,034 INFO L276 IsEmpty]: Start isEmpty. Operand 1906 states and 6483 transitions. [2021-03-11 00:17:59,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:17:59,037 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:17:59,037 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:17:59,237 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2767,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:17:59,237 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:17:59,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:17:59,238 INFO L82 PathProgramCache]: Analyzing trace with hash 518793590, now seen corresponding path program 40 times [2021-03-11 00:17:59,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:17:59,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373216852] [2021-03-11 00:17:59,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:17:59,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:17:59,824 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 30 [2021-03-11 00:18:00,163 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 28 [2021-03-11 00:18:00,581 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 32 [2021-03-11 00:18:00,928 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 27 [2021-03-11 00:18:00,989 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:18:00,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373216852] [2021-03-11 00:18:00,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114268269] [2021-03-11 00:18:00,990 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 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 [2021-03-11 00:18:01,009 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:18:01,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:18:01,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:18:01,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:18:01,620 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-11 00:18:02,701 WARN L205 SmtUtils]: Spent 598.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-03-11 00:18:03,936 WARN L205 SmtUtils]: Spent 567.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 67 [2021-03-11 00:18:04,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:18:04,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:18:04,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:18:04,496 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 33 treesize of output 19 [2021-03-11 00:18:04,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:18:04,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:18:04,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:18:04,519 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 28 treesize of output 16 [2021-03-11 00:18:04,524 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:18:05,205 WARN L205 SmtUtils]: Spent 680.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-03-11 00:18:05,206 INFO L628 ElimStorePlain]: treesize reduction 55, result has 68.4 percent of original size [2021-03-11 00:18:05,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:18:05,221 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 21 treesize of output 13 [2021-03-11 00:18:05,228 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:18:05,517 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-03-11 00:18:05,518 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:18:05,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:18:05,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:18:05,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-11 00:18:05,539 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 28 treesize of output 16 [2021-03-11 00:18:05,545 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:18:05,800 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-11 00:18:05,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:18:05,809 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-11 00:18:05,810 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 9 variables, input treesize:215, output treesize:51 [2021-03-11 00:18:06,034 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2021-03-11 00:18:06,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:18:06,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:18:06,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:18:06,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738502080] [2021-03-11 00:18:06,106 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:18:06,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:18:06,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:18:06,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:18:06,106 INFO L87 Difference]: Start difference. First operand 1906 states and 6483 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:18:06,403 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 28 [2021-03-11 00:18:06,756 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-03-11 00:18:07,068 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-03-11 00:18:08,046 WARN L205 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2021-03-11 00:18:08,263 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-11 00:18:08,771 WARN L205 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2021-03-11 00:18:09,209 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2021-03-11 00:18:09,860 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-11 00:18:10,867 WARN L205 SmtUtils]: Spent 618.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-03-11 00:18:13,278 WARN L205 SmtUtils]: Spent 2.18 s on a formula simplification. DAG size of input: 116 DAG size of output: 95 [2021-03-11 00:18:14,129 WARN L205 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 35 [2021-03-11 00:18:14,877 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-11 00:18:14,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:18:14,975 INFO L93 Difference]: Finished difference Result 2670 states and 8741 transitions. [2021-03-11 00:18:14,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-11 00:18:14,980 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-11 00:18:14,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:18:14,984 INFO L225 Difference]: With dead ends: 2670 [2021-03-11 00:18:14,984 INFO L226 Difference]: Without dead ends: 2625 [2021-03-11 00:18:14,984 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 10603.9ms TimeCoverageRelationStatistics Valid=214, Invalid=908, Unknown=0, NotChecked=0, Total=1122 [2021-03-11 00:18:14,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2625 states. [2021-03-11 00:18:15,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2625 to 1911. [2021-03-11 00:18:15,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1911 states, 1910 states have (on average 3.4078534031413614) internal successors, (6509), 1910 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) [2021-03-11 00:18:15,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1911 states to 1911 states and 6509 transitions. [2021-03-11 00:18:15,016 INFO L78 Accepts]: Start accepts. Automaton has 1911 states and 6509 transitions. Word has length 26 [2021-03-11 00:18:15,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:18:15,016 INFO L480 AbstractCegarLoop]: Abstraction has 1911 states and 6509 transitions. [2021-03-11 00:18:15,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:18:15,016 INFO L276 IsEmpty]: Start isEmpty. Operand 1911 states and 6509 transitions. [2021-03-11 00:18:15,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:18:15,019 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:18:15,019 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:18:15,219 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2824 [2021-03-11 00:18:15,219 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:18:15,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:18:15,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1098739190, now seen corresponding path program 41 times [2021-03-11 00:18:15,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:18:15,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823909925] [2021-03-11 00:18:15,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:18:15,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:18:16,151 WARN L205 SmtUtils]: Spent 565.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 35 [2021-03-11 00:18:16,695 WARN L205 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-03-11 00:18:16,960 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-03-11 00:18:17,200 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:18:17,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823909925] [2021-03-11 00:18:17,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53265444] [2021-03-11 00:18:17,200 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 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 [2021-03-11 00:18:17,221 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:18:17,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:18:17,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-11 00:18:17,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:18:18,161 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-03-11 00:18:19,377 WARN L205 SmtUtils]: Spent 762.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-03-11 00:18:19,595 INFO L446 ElimStorePlain]: Different costs {2=[A, v_prenex_366, v_prenex_369, v_prenex_359], 3=[v_prenex_360, v_prenex_361, v_prenex_363, v_prenex_364]} [2021-03-11 00:18:19,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:18:19,647 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:18:19,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-03-11 00:18:19,653 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:18:20,313 WARN L205 SmtUtils]: Spent 659.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-03-11 00:18:20,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:18:20,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:18:20,368 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:18:20,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 27 [2021-03-11 00:18:20,380 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:18:21,049 WARN L205 SmtUtils]: Spent 668.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-03-11 00:18:21,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:18:21,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:18:21,106 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 00:18:21,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-03-11 00:18:21,115 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:18:21,735 WARN L205 SmtUtils]: Spent 619.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-03-11 00:18:21,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:18:21,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:18:21,785 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:18:21,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-03-11 00:18:21,792 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:18:22,357 WARN L205 SmtUtils]: Spent 564.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-03-11 00:18:22,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:18:22,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:18:22,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:18:22,397 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:18:22,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-03-11 00:18:22,410 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:18:22,827 WARN L205 SmtUtils]: Spent 416.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-03-11 00:18:22,828 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:18:22,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:18:22,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:18:22,871 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-03-11 00:18:22,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 19 [2021-03-11 00:18:22,877 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:18:23,288 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-03-11 00:18:23,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:18:23,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:18:23,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:18:23,348 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-03-11 00:18:23,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 22 [2021-03-11 00:18:23,355 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:18:23,938 WARN L205 SmtUtils]: Spent 581.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-03-11 00:18:23,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:18:23,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:18:23,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:18:23,990 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:18:23,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-03-11 00:18:24,013 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:18:24,579 WARN L205 SmtUtils]: Spent 565.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2021-03-11 00:18:24,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:18:24,600 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:18:24,600 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:329, output treesize:194 [2021-03-11 00:18:25,169 WARN L205 SmtUtils]: Spent 453.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-03-11 00:18:25,592 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 21 [2021-03-11 00:18:25,709 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:18:25,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:18:25,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-11 00:18:25,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092682731] [2021-03-11 00:18:25,710 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:18:25,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:18:25,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:18:25,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:18:25,710 INFO L87 Difference]: Start difference. First operand 1911 states and 6509 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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) [2021-03-11 00:18:26,032 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 25 [2021-03-11 00:18:26,393 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-11 00:18:26,919 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2021-03-11 00:18:27,741 WARN L205 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 32 [2021-03-11 00:18:28,438 WARN L205 SmtUtils]: Spent 581.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2021-03-11 00:18:29,325 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-11 00:18:30,607 WARN L205 SmtUtils]: Spent 841.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-03-11 00:18:32,714 WARN L205 SmtUtils]: Spent 1.82 s on a formula simplification. DAG size of input: 94 DAG size of output: 89 [2021-03-11 00:18:33,409 WARN L205 SmtUtils]: Spent 487.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-11 00:18:34,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:18:34,122 INFO L93 Difference]: Finished difference Result 2475 states and 8242 transitions. [2021-03-11 00:18:34,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-11 00:18:34,127 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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) Word has length 26 [2021-03-11 00:18:34,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:18:34,131 INFO L225 Difference]: With dead ends: 2475 [2021-03-11 00:18:34,131 INFO L226 Difference]: Without dead ends: 2456 [2021-03-11 00:18:34,131 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 10841.0ms TimeCoverageRelationStatistics Valid=199, Invalid=793, Unknown=0, NotChecked=0, Total=992 [2021-03-11 00:18:34,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2456 states. [2021-03-11 00:18:34,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2456 to 1892. [2021-03-11 00:18:34,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1892 states, 1891 states have (on average 3.401374933897409) internal successors, (6432), 1891 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) [2021-03-11 00:18:34,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1892 states to 1892 states and 6432 transitions. [2021-03-11 00:18:34,159 INFO L78 Accepts]: Start accepts. Automaton has 1892 states and 6432 transitions. Word has length 26 [2021-03-11 00:18:34,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:18:34,160 INFO L480 AbstractCegarLoop]: Abstraction has 1892 states and 6432 transitions. [2021-03-11 00:18:34,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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) [2021-03-11 00:18:34,160 INFO L276 IsEmpty]: Start isEmpty. Operand 1892 states and 6432 transitions. [2021-03-11 00:18:34,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:18:34,162 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:18:34,162 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:18:34,362 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2836,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:18:34,363 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:18:34,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:18:34,363 INFO L82 PathProgramCache]: Analyzing trace with hash 305289786, now seen corresponding path program 42 times [2021-03-11 00:18:34,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:18:34,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990897494] [2021-03-11 00:18:34,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:18:34,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:18:34,841 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2021-03-11 00:18:35,082 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2021-03-11 00:18:35,376 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 26 [2021-03-11 00:18:35,642 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2021-03-11 00:18:35,858 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 12 [2021-03-11 00:18:35,862 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:18:35,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990897494] [2021-03-11 00:18:35,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587904074] [2021-03-11 00:18:35,862 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 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 [2021-03-11 00:18:35,884 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:18:35,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:18:35,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:18:35,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:18:36,456 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-03-11 00:18:36,665 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-03-11 00:18:37,091 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-03-11 00:18:38,017 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-03-11 00:18:39,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:18:39,302 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:18:39,302 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2021-03-11 00:18:39,309 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-11 00:18:39,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:18:39,392 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:18:39,393 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-03-11 00:18:39,399 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-11 00:18:40,243 WARN L205 SmtUtils]: Spent 843.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-03-11 00:18:40,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:18:40,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:18:40,380 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:18:40,380 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 25 [2021-03-11 00:18:40,399 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-11 00:18:40,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:18:40,511 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:18:40,511 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 28 [2021-03-11 00:18:40,519 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-11 00:18:41,373 WARN L205 SmtUtils]: Spent 853.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-03-11 00:18:41,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:18:41,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:18:41,473 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:18:41,473 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2021-03-11 00:18:41,501 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-11 00:18:41,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:18:41,601 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-03-11 00:18:41,602 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-03-11 00:18:41,610 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-11 00:18:42,399 WARN L205 SmtUtils]: Spent 788.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-03-11 00:18:42,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:18:42,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:18:42,523 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-03-11 00:18:42,523 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2021-03-11 00:18:42,544 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-11 00:18:42,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-11 00:18:42,617 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:18:42,618 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2021-03-11 00:18:42,628 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-11 00:18:43,349 WARN L205 SmtUtils]: Spent 720.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-03-11 00:18:43,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 00:18:43,426 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-11 00:18:43,426 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:349, output treesize:329 [2021-03-11 00:18:44,745 WARN L205 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-03-11 00:18:45,214 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 20 [2021-03-11 00:18:45,262 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:18:45,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:18:45,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-11 00:18:45,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423404935] [2021-03-11 00:18:45,262 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:18:45,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:18:45,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:18:45,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:18:45,263 INFO L87 Difference]: Start difference. First operand 1892 states and 6432 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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) [2021-03-11 00:18:45,831 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 26 [2021-03-11 00:18:46,366 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2021-03-11 00:18:46,537 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-03-11 00:18:47,241 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 33 [2021-03-11 00:18:47,684 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-03-11 00:18:48,242 WARN L205 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 35 [2021-03-11 00:18:49,287 WARN L205 SmtUtils]: Spent 833.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2021-03-11 00:18:50,451 WARN L205 SmtUtils]: Spent 822.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-03-11 00:18:51,547 WARN L205 SmtUtils]: Spent 931.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 73 [2021-03-11 00:18:52,777 WARN L205 SmtUtils]: Spent 886.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 68 [2021-03-11 00:18:53,409 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-11 00:18:54,157 WARN L205 SmtUtils]: Spent 647.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-03-11 00:18:55,638 WARN L205 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 55 DAG size of output: 30 [2021-03-11 00:18:56,309 WARN L205 SmtUtils]: Spent 528.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-03-11 00:18:58,426 WARN L205 SmtUtils]: Spent 1.87 s on a formula simplification. DAG size of input: 73 DAG size of output: 45 [2021-03-11 00:18:58,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:18:58,562 INFO L93 Difference]: Finished difference Result 2514 states and 8295 transitions. [2021-03-11 00:18:58,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-11 00:18:58,567 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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) Word has length 26 [2021-03-11 00:18:58,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:18:58,571 INFO L225 Difference]: With dead ends: 2514 [2021-03-11 00:18:58,571 INFO L226 Difference]: Without dead ends: 2484 [2021-03-11 00:18:58,571 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 15646.1ms TimeCoverageRelationStatistics Valid=229, Invalid=1177, Unknown=0, NotChecked=0, Total=1406 [2021-03-11 00:18:58,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2484 states. [2021-03-11 00:18:58,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2484 to 1937. [2021-03-11 00:18:58,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1937 states, 1936 states have (on average 3.396694214876033) internal successors, (6576), 1936 states have internal predecessors, (6576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:18:58,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1937 states to 1937 states and 6576 transitions. [2021-03-11 00:18:58,599 INFO L78 Accepts]: Start accepts. Automaton has 1937 states and 6576 transitions. Word has length 26 [2021-03-11 00:18:58,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:18:58,599 INFO L480 AbstractCegarLoop]: Abstraction has 1937 states and 6576 transitions. [2021-03-11 00:18:58,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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) [2021-03-11 00:18:58,599 INFO L276 IsEmpty]: Start isEmpty. Operand 1937 states and 6576 transitions. [2021-03-11 00:18:58,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-11 00:18:58,601 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:18:58,601 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:18:58,802 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2852 [2021-03-11 00:18:58,802 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:18:58,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:18:58,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1930035334, now seen corresponding path program 43 times [2021-03-11 00:18:58,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:18:58,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041221573] [2021-03-11 00:18:58,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:18:58,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:18:59,374 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2021-03-11 00:18:59,661 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 25 [2021-03-11 00:18:59,850 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-03-11 00:19:00,017 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 16 [2021-03-11 00:19:00,173 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 12 [2021-03-11 00:19:00,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:00,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041221573] [2021-03-11 00:19:00,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464263407] [2021-03-11 00:19:00,178 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 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 [2021-03-11 00:19:00,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:19:00,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-11 00:19:00,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:19:00,631 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-03-11 00:19:00,968 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 44 Received shutdown request... [2021-03-11 00:19:01,951 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2916 [2021-03-11 00:19:01,951 WARN L545 AbstractCegarLoop]: Verification canceled [2021-03-11 00:19:01,955 WARN L224 ceAbstractionStarter]: Timeout [2021-03-11 00:19:01,955 INFO L202 PluginConnector]: Adding new model min-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.03 12:19:01 BasicIcfg [2021-03-11 00:19:01,955 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-11 00:19:01,956 INFO L168 Benchmark]: Toolchain (without parser) took 789529.80 ms. Allocated memory was 255.9 MB in the beginning and 717.2 MB in the end (delta: 461.4 MB). Free memory was 236.2 MB in the beginning and 344.2 MB in the end (delta: -107.9 MB). Peak memory consumption was 354.2 MB. Max. memory is 16.0 GB. [2021-03-11 00:19:01,956 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.24 ms. Allocated memory is still 255.9 MB. Free memory was 237.4 MB in the beginning and 237.2 MB in the end (delta: 185.6 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 00:19:01,956 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.52 ms. Allocated memory is still 255.9 MB. Free memory was 235.7 MB in the beginning and 234.1 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 00:19:01,956 INFO L168 Benchmark]: Boogie Preprocessor took 21.08 ms. Allocated memory is still 255.9 MB. Free memory was 234.1 MB in the beginning and 233.2 MB in the end (delta: 983.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 00:19:01,956 INFO L168 Benchmark]: RCFGBuilder took 287.35 ms. Allocated memory is still 255.9 MB. Free memory was 233.2 MB in the beginning and 235.0 MB in the end (delta: -1.8 MB). Peak memory consumption was 17.5 MB. Max. memory is 16.0 GB. [2021-03-11 00:19:01,956 INFO L168 Benchmark]: TraceAbstraction took 789182.90 ms. Allocated memory was 255.9 MB in the beginning and 717.2 MB in the end (delta: 461.4 MB). Free memory was 235.0 MB in the beginning and 344.2 MB in the end (delta: -109.2 MB). Peak memory consumption was 351.4 MB. Max. memory is 16.0 GB. [2021-03-11 00:19:01,957 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 0.24 ms. Allocated memory is still 255.9 MB. Free memory was 237.4 MB in the beginning and 237.2 MB in the end (delta: 185.6 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 28.52 ms. Allocated memory is still 255.9 MB. Free memory was 235.7 MB in the beginning and 234.1 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 21.08 ms. Allocated memory is still 255.9 MB. Free memory was 234.1 MB in the beginning and 233.2 MB in the end (delta: 983.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 287.35 ms. Allocated memory is still 255.9 MB. Free memory was 233.2 MB in the beginning and 235.0 MB in the end (delta: -1.8 MB). Peak memory consumption was 17.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 789182.90 ms. Allocated memory was 255.9 MB in the beginning and 717.2 MB in the end (delta: 461.4 MB). Free memory was 235.0 MB in the beginning and 344.2 MB in the end (delta: -109.2 MB). Peak memory consumption was 351.4 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 66]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 66). Cancelled while BasicCegarLoop was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing forward predicates,while QuantifierPusher was running 1 iterations of DualJunctionQuantifierElimination. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 789078.6ms, OverallIterations: 99, TraceHistogramMax: 2, EmptinessCheckTime: 303.4ms, AutomataDifference: 477562.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 45.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 4087 SDtfs, 20133 SDslu, 30909 SDs, 0 SdLazy, 56255 SolverSat, 3362 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 58502.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5225 GetRequests, 1774 SyntacticMatches, 96 SemanticMatches, 3355 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40380 ImplicationChecksByTransitivity, 512784.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1948occurred in iteration=90, InterpolantAutomatonStates: 2619, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 3189.8ms AutomataMinimizationTime, 98 MinimizatonAttempts, 74116 StatesRemovedByMinimization, 98 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 395.0ms SsaConstructionTime, 1431.7ms SatisfiabilityAnalysisTime, 281011.7ms InterpolantComputationTime, 4830 NumberOfCodeBlocks, 4830 NumberOfCodeBlocksAsserted, 307 NumberOfCheckSat, 4637 ConstructedInterpolants, 135 QuantifiedInterpolants, 147333 SizeOfPredicates, 546 NumberOfNonLiveVariables, 6250 ConjunctsInSsa, 1865 ConjunctsInUnsatCore, 193 InterpolantComputations, 3 PerfectInterpolantSequences, 107/1102 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